// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License.  You may obtain a copy
// of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
// License for the specific language governing permissions and limitations under
// the License.

// Used by replication test
if (typeof window == 'undefined' || !window) {
  CouchDB.host = "127.0.0.1:5984";
  CouchDB.inBrowser = false;
} else {
  CouchDB.host = window.location.host;
  CouchDB.inBrowser = true;
}

var tests = {

  // Do some basic tests.
  basics: function(debug) {
    var result = JSON.parse(CouchDB.request("GET", "/").responseText);
    T(result.couchdb == "Welcome"); 
    
    var db = new CouchDB("test_suite_db");
    db.deleteDb();

    // bug COUCHDB-100: DELETE on non-existent DB returns 500 instead of 404
    db.deleteDb();
    
    db.createDb();

    // PUT on existing DB should return 409 instead of 500
    xhr = CouchDB.request("PUT", "/test_suite_db/");
    T(xhr.status == 409);
    if (debug) debugger;

    // Get the database info, check the db_name
    T(db.info().db_name == "test_suite_db");

    // Get the database info, check the doc_count
    T(db.info().doc_count == 0);

    // create a document and save it to the database
    var doc = {_id:"0",a:1,b:1};
    var result = db.save(doc);

    T(result.ok==true); // return object has an ok member with a value true
    T(result.id); // the _id of the document is set.
    T(result.rev); // the revision id of the document is set.

    // Verify the input doc is now set with the doc id and rev
    // (for caller convenience).
    T(doc._id == result.id && doc._rev == result.rev);

    var id = result.id; // save off the id for later

    // make sure the revs_info status is good
    var doc = db.open(id, {revs_info:true});
    T(doc._revs_info[0].status == "available");

    // Create some more documents.
    // Notice the use of the ok member on the return result.
    T(db.save({_id:"1",a:2,b:4}).ok);
    T(db.save({_id:"2",a:3,b:9}).ok);
    T(db.save({_id:"3",a:4,b:16}).ok);

    // Check the database doc count
    T(db.info().doc_count == 4);

    // Test a simple map functions

    // create a map function that selects all documents whose "a" member
    // has a value of 4, and then returns the document's b value.
    var mapFunction = function(doc){
      if (doc.a==4)
        emit(null, doc.b);
    };

    results = db.query(mapFunction);

    // verify only one document found and the result value (doc.b).
    T(results.total_rows == 1 && results.rows[0].value == 16);

    // reopen document we saved earlier
    existingDoc = db.open(id);

    T(existingDoc.a==1);

    //modify and save
    existingDoc.a=4;
    db.save(existingDoc);

    // redo the map query
    results = db.query(mapFunction);

    // the modified document should now be in the results.
    T(results.total_rows == 2);

    // write 2 more documents
    T(db.save({a:3,b:9}).ok);
    T(db.save({a:4,b:16}).ok);

    results = db.query(mapFunction);

    // 1 more document should now be in the result.
    T(results.total_rows == 3);
    T(db.info().doc_count == 6);

    var reduceFunction = function(keys, values){
      return sum(values);
    };

    results = db.query(mapFunction, reduceFunction);

    T(results.rows[0].value == 33);

    // delete a document
    T(db.deleteDoc(existingDoc).ok);

    // make sure we can't open the doc
    T(db.open(existingDoc._id) == null);

    results = db.query(mapFunction);

    // 1 less document should now be in the results.
    T(results.total_rows == 2);
    T(db.info().doc_count == 5);

    // make sure we can still open the old rev of the deleted doc
    T(db.open(existingDoc._id, {rev: existingDoc._rev}) != null);
    
    // make sure restart works
    T(db.ensureFullCommit().ok);
    restartServer();
    
    // make sure we can still open
    T(db.open(existingDoc._id, {rev: existingDoc._rev}) != null);
  },
  
  delayed_commits: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
    
    // By default, couchdb doesn't fully commit documents to disk right away,
    // it waits about a second to batch the full commit flush along with any 
    // other updates. If it crashes or is restarted you may lose the most
    // recent commits.
    
    T(db.save({_id:"1",a:2,b:4}).ok);
    T(db.open("1") != null);
    
    restartServer();
    
    T(db.open("1") == null); // lost the update.
    // note if we waited > 1 sec before the restart, the doc would likely
    // commit.
    
    
    // Retry the same thing but with full commits on.
    
    var db2 = new CouchDB("test_suite_db", {"X-Couch-Full-Commit":"true"});
    
    T(db2.save({_id:"1",a:2,b:4}).ok);
    T(db2.open("1") != null);
    
    restartServer();
    
    T(db2.open("1") != null);
    
    // You can update but without committing immediately, and then ensure
    // everything is commited in the last step.
    
    T(db.save({_id:"2",a:2,b:4}).ok);
    T(db.open("2") != null);
    T(db.ensureFullCommit().ok);
    restartServer();
    
    T(db.open("2") != null);
    
    // However, it's possible even when flushed, that the server crashed between
    // the update and the commit, and you don't want to check to make sure
    // every doc you updated actually made it to disk. So record the instance
    // start time of the database before the updates and then check it again
    // after the flush (the instance start time is returned by the flush
    // operation). if they are the same, we know everything was updated
    // safely.
    
    // First try it with a crash.
    
    var instanceStartTime = db.info().instance_start_time;
    
    T(db.save({_id:"3",a:2,b:4}).ok);
    T(db.open("3") != null);
    
    restartServer();
    
    var commitResult = db.ensureFullCommit();
    T(commitResult.ok && commitResult.instance_start_time != instanceStartTime);
    // start times don't match, meaning the server lost our change
    
    T(db.open("3") == null); // yup lost it
    
    // retry with no server restart
    
    var instanceStartTime = db.info().instance_start_time;
    
    T(db.save({_id:"4",a:2,b:4}).ok);
    T(db.open("4") != null);
    
    var commitResult = db.ensureFullCommit();
    T(commitResult.ok && commitResult.instance_start_time == instanceStartTime);
    // Successful commit, start times match!
    
    restartServer();
    
    T(db.open("4") != null);
    
  },
  
  all_docs: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
    
    // Create some more documents.
    // Notice the use of the ok member on the return result.
    T(db.save({_id:"0",a:1,b:1}).ok);
    T(db.save({_id:"3",a:4,b:16}).ok);
    T(db.save({_id:"1",a:2,b:4}).ok);
    T(db.save({_id:"2",a:3,b:9}).ok);

    // Check the all docs
    var results = db.allDocs();
    var rows = results.rows;

    T(results.total_rows == results.rows.length);

    for(var i=0; i < rows.length; i++) {
      T(rows[i].id >= "0" && rows[i].id <= "4");
    }
    
    // Check _all_docs with descending=true
    var desc = db.allDocs({descending:true});
    T(desc.total_rows == desc.rows.length);
 
    // Check _all_docs offset
    var all = db.allDocs({startkey:"2"});
    T(all.offset == 2);
    
    // check that the docs show up in the seq view in the order they were created
    var all_seq = db.allDocsBySeq();
    var ids = ["0","3","1","2"];
    for (var i=0; i < all_seq.rows.length; i++) {
      var row = all_seq.rows[i];
      T(row.id == ids[i]);
    };
    
    // it should work in reverse as well
    all_seq = db.allDocsBySeq({descending:true});
    ids = ["2","1","3","0"];
    for (var i=0; i < all_seq.rows.length; i++) {
      var row = all_seq.rows[i];
      T(row.id == ids[i]);
    };
    
    // check that deletions also show up right
    var doc1 = db.open("1");
    var deleted = db.deleteDoc(doc1);
    T(deleted.ok);
    all_seq = db.allDocsBySeq();
    
    // the deletion should make doc id 1 have the last seq num
    T(all_seq.rows.length == 4);
    T(all_seq.rows[3].id == "1");
    T(all_seq.rows[3].value.deleted);

    // is this a bug?
    // T(all_seq.rows.length == all_seq.total_rows);
    
    // do an update
    var doc2 = db.open("3");
    doc2.updated = "totally";
    db.save(doc2);
    all_seq = db.allDocsBySeq();
    
    // the update should make doc id 3 have the last seq num
    T(all_seq.rows.length == 4);
    T(all_seq.rows[3].id == "3");

    // ok now lets see what happens with include docs
    all_seq = db.allDocsBySeq({include_docs: true});
    T(all_seq.rows.length == 4);
    T(all_seq.rows[3].id == "3");
    T(all_seq.rows[3].doc.updated == "totally");

    // and on the deleted one, no doc
    T(all_seq.rows[2].value.deleted);
    T(!all_seq.rows[2].doc);
    
    // test the all docs collates sanely
    db.save({_id: "Z", foo: "Z"});
    db.save({_id: "a", foo: "a"});

    var rows = db.allDocs({startkey: "Z", endkey: "Z"}).rows;
    T(rows.length == 1);
  },
  
  // Do some edit conflict detection tests
  conflicts: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    // create a doc and save
    var doc = {_id:"foo",a:1,b:1};
    T(db.save(doc).ok);

    // reopen
    var doc2 = db.open(doc._id);

    // ensure the revisions are the same
    T(doc._id == doc2._id && doc._rev == doc2._rev);

    // edit the documents.
    doc.a = 2;
    doc2.a = 3;

    // save one document
    T(db.save(doc).ok);

    // save the other document
    try {
      db.save(doc2);  // this should generate a conflict exception
      T("no save conflict 1" && false); // we shouldn't hit here
    } catch (e) {
      T(e.error == "conflict");
    }

    // Now clear out the _rev member and save. This indicates this document is
    // new, not based on an existing revision.
    doc2._rev = undefined;
    try {
      db.save(doc2); // this should generate a conflict exception
      T("no save conflict 2" && false); // we shouldn't hit here
    } catch (e) {
      T(e.error == "conflict");
    }

    // Now delete the document from the database
    T(db.deleteDoc(doc).ok);

    T(db.save(doc2).ok);  // we can save a new document over a deletion without
                          // knowing the deletion rev.
  },

  recreate_doc: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    // First create a new document with the ID "foo", and delete it again
    var doc = {_id: "foo", a: "bar", b: 42};
    T(db.save(doc).ok);
    T(db.deleteDoc(doc).ok);

    // Now create a new document with the same ID, save it, and then modify it
    // This should work fine, but currently results in a conflict error, at
    // least "sometimes"
    for (var i = 0; i < 10; i++) {
      doc = {_id: "foo"};
      T(db.save(doc).ok);
      doc = db.open("foo");
      doc.a = "baz";
      try {
        T(db.save(doc).ok);
      } finally {
        // And now, we can't even delete the document anymore :/
        T(db.deleteDoc(doc).rev != undefined);
      }
    }
  },

  copy_move_doc: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    // copy a doc
    T(db.save({_id:"doc_to_be_copied",v:1}).ok);
    var xhr = CouchDB.request("COPY", "/test_suite_db/doc_to_be_copied", {
      headers: {"Destination":"doc_that_was_copied"}
    });

    T(xhr.status == 201);
    T(db.open("doc_that_was_copied").v == 1);

    // move a doc

    // test error condition
    var xhr = CouchDB.request("MOVE", "/test_suite_db/doc_to_be_copied", {
      headers: {"Destination":"doc_that_was_moved"}
    });
    T(xhr.status == 400); // bad request, MOVE requires source rev.

    var rev = db.open("doc_to_be_copied")._rev;
    var xhr = CouchDB.request("MOVE", "/test_suite_db/doc_to_be_copied?rev=" + rev, {
      headers: {"Destination":"doc_that_was_moved"}
    });

    T(xhr.status == 201);
    T(db.open("doc_that_was_moved").v == 1);
    T(db.open("doc_to_be_copied") == null);

    // COPY with existing target
    T(db.save({_id:"doc_to_be_copied",v:1}).ok);
    var doc = db.save({_id:"doc_to_be_overwritten",v:2});
    T(doc.ok);

    // error condition
    var xhr = CouchDB.request("COPY", "/test_suite_db/doc_to_be_copied", {
        headers: {"Destination":"doc_to_be_overwritten"}
    });
    T(xhr.status == 412); // conflict

    var rev = db.open("doc_to_be_overwritten")._rev;
    var xhr = CouchDB.request("COPY", "/test_suite_db/doc_to_be_copied", {
      headers: {"Destination":"doc_to_be_overwritten?rev=" + rev}
    });
    T(xhr.status == 201);

    var over = db.open("doc_to_be_overwritten");
    T(rev != over._rev);
    T(over.v == 1);
  },

  uuids: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
    
    // a single UUID without an explicit count
    var xhr = CouchDB.request("POST", "/_uuids");
    T(xhr.status == 200);
    var result = JSON.parse(xhr.responseText);
    T(result.uuids.length == 1);
    var first = result.uuids[0];

    // a single UUID with an explicit count
    xhr = CouchDB.request("POST", "/_uuids?count=1");
    T(xhr.status == 200);
    result = JSON.parse(xhr.responseText);
    T(result.uuids.length == 1);
    var second = result.uuids[0];
    T(first != second);

    // no collisions with 1,000 UUIDs
    xhr = CouchDB.request("POST", "/_uuids?count=1000");
    T(xhr.status == 200);
    result = JSON.parse(xhr.responseText);
    T( result.uuids.length == 1000 );
    var seen = {};
    for(var i in result.uuids) {
      var id = result.uuids[i];
      T(seen[id] === undefined);
      seen[id] = 1;
    }
    
    // check our library
  },
  
  bulk_docs: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var docs = makeDocs(5);

    // Create the docs
    var result = db.bulkSave(docs);
    T(result.ok);
    T(result.new_revs.length == 5);
    for (var i = 0; i < 5; i++) {
      T(result.new_revs[i].id == docs[i]._id);
      T(result.new_revs[i].rev);
      docs[i].string = docs[i].string + ".00";
    }

    // Update the docs
    result = db.bulkSave(docs);
    T(result.ok);
    T(result.new_revs.length == 5);
    for (i = 0; i < 5; i++) {
      T(result.new_revs[i].id == i.toString());
      docs[i]._deleted = true;
    }

    // Delete the docs
    result = db.bulkSave(docs);
    T(result.ok);
    T(result.new_revs.length == 5);
    for (i = 0; i < 5; i++) {
      T(db.open(docs[i]._id) == null);
    }
    
    // verify creating a document with no id returns a new id
    var req = CouchDB.request("POST", "/test_suite_db/_bulk_docs", {
      body: JSON.stringify({"docs": [{"foo":"bar"}]})
    });
    result = JSON.parse(req.responseText);
    
    T(result.new_revs[0].id != "");
    T(result.new_revs[0].rev != "");
  },

  // test saving a semi-large quanitity of documents and do some view queries.
  lots_of_docs: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    // keep number lowish for now to keep tests fasts. Crank up manually to
    // to really test.
    var numDocsToCreate = 500;

    for(var i=0; i < numDocsToCreate; i += 100) {
        var createNow = Math.min(numDocsToCreate - i, 100);
        var docs = makeDocs(i, i + createNow);
        T(db.bulkSave(docs).ok);
    }

    // query all documents, and return the doc.integer member as a key.
    results = db.query(function(doc){ emit(doc.integer, null) });

    T(results.total_rows == numDocsToCreate);

    // validate the keys are ordered ascending
    for(var i=0; i<numDocsToCreate; i++) {
      T(results.rows[i].key==i);
    }

    // do the query again, but with descending output
    results = db.query(function(doc){ emit(doc.integer, null) }, null, {
      descending: true
    });

    T(results.total_rows == numDocsToCreate);

    // validate the keys are ordered descending
    for(var i=0; i<numDocsToCreate; i++) {
      T(results.rows[numDocsToCreate-1-i].key==i);
    }

    // Check _all_docs with descending=true again (now that there are many docs)
    // this fails, see COUCHDB-109
    // var desc = db.allDocs({descending:true});
    // T(desc.total_rows == desc.rows.length);
  },

  reduce: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
    var numDocs = 500
    var docs = makeDocs(1,numDocs + 1);
    T(db.bulkSave(docs).ok);
    var summate = function(N) {return (N+1)*N/2;};

    var map = function (doc) {
        emit(doc.integer, doc.integer);
        emit(doc.integer, doc.integer)};
    var reduce = function (keys, values) { return sum(values); };
    var result = db.query(map, reduce);
    T(result.rows[0].value == 2*summate(numDocs));

    result = db.query(map, reduce, {startkey: 4, endkey: 4});
    T(result.rows[0].value == 8);

    result = db.query(map, reduce, {startkey: 4, endkey: 5});
    T(result.rows[0].value == 18);

    result = db.query(map, reduce, {startkey: 4, endkey: 6});
    T(result.rows[0].value == 30);

    result = db.query(map, reduce, {group:true, limit:3});
    T(result.rows[0].value == 2);
    T(result.rows[1].value == 4);
    T(result.rows[2].value == 6);

    for(var i=1; i<numDocs/2; i+=30) {
      result = db.query(map, reduce, {startkey: i, endkey: numDocs - i});
      T(result.rows[0].value == 2*(summate(numDocs-i) - summate(i-1)));
    }

    db.deleteDb();
    db.createDb();

    for(var i=1; i <= 5; i++) {

      for(var j=0; j < 10; j++) {
        // these docs are in the order of the keys collation, for clarity
        var docs = [];
        docs.push({keys:["a"]});
        docs.push({keys:["a"]});
        docs.push({keys:["a", "b"]});
        docs.push({keys:["a", "b"]});
        docs.push({keys:["a", "b", "c"]});
        docs.push({keys:["a", "b", "d"]});
        docs.push({keys:["a", "c", "d"]});
        docs.push({keys:["d"]});
        docs.push({keys:["d", "a"]});
        docs.push({keys:["d", "b"]});
        docs.push({keys:["d", "c"]});
        T(db.bulkSave(docs).ok);
        T(db.info().doc_count == ((i - 1) * 10 * 11) + ((j + 1) * 11));
      }

      map = function (doc) {emit(doc.keys, 1)};
      reduce = function (keys, values) { return sum(values); };

      var results = db.query(map, reduce, {group:true});

      //group by exact key match
      T(equals(results.rows[0], {key:["a"],value:20*i}));
      T(equals(results.rows[1], {key:["a","b"],value:20*i}));
      T(equals(results.rows[2], {key:["a", "b", "c"],value:10*i}));
      T(equals(results.rows[3], {key:["a", "b", "d"],value:10*i}));

      // test to make sure group reduce and limit params provide valid json
      var results = db.query(map, reduce, {group: true, limit: 2});
      T(equals(results.rows[0], {key: ["a"], value: 20*i}));
      T(equals(results.rows.length, 2));

      //group by the first element in the key array
      var results = db.query(map, reduce, {group_level:1});
      T(equals(results.rows[0], {key:["a"],value:70*i}));
      T(equals(results.rows[1], {key:["d"],value:40*i}));

      //group by the first 2 elements in the key array
      var results = db.query(map, reduce, {group_level:2});
      T(equals(results.rows[0], {key:["a"],value:20*i}));
      T(equals(results.rows[1], {key:["a","b"],value:40*i}));
      T(equals(results.rows[2], {key:["a","c"],value:10*i}));
      T(equals(results.rows[3], {key:["d"],value:10*i}));
      T(equals(results.rows[4], {key:["d","a"],value:10*i}));
      T(equals(results.rows[5], {key:["d","b"],value:10*i}));
      T(equals(results.rows[6], {key:["d","c"],value:10*i}));
    }

    // now test out more complex reductions that need to use the combine option.

    db.deleteDb();
    db.createDb();


    var map = function (doc) {emit(doc.val, doc.val)};
    var reduceCombine = function (keys, values, rereduce) {
        // This computes the standard deviation of the mapped results
        var stdDeviation=0.0;
        var count=0;
        var total=0.0;
        var sqrTotal=0.0;

        if (!rereduce) {
          // This is the reduce phase, we are reducing over emitted values from
          // the map functions.
          for(var i in values) {
            total = total + values[i];
            sqrTotal = sqrTotal + (values[i] * values[i]);
          }
          count = values.length;
        }
        else {
          // This is the rereduce phase, we are re-reducing previosuly
          // reduced values.
          for(var i in values) {
            count = count + values[i].count;
            total = total + values[i].total;
            sqrTotal = sqrTotal + values[i].sqrTotal;
          }
        }

        var variance =  (sqrTotal - ((total * total)/count)) / count;
        stdDeviation = Math.sqrt(variance);

        // the reduce result. It contains enough information to be rereduced
        // with other reduce results.
        return {"stdDeviation":stdDeviation,"count":count,
            "total":total,"sqrTotal":sqrTotal};
      };

      // Save a bunch a docs.

    for(var i=0; i < 10; i++) {
      var docs = [];
      docs.push({val:10});
      docs.push({val:20});
      docs.push({val:30});
      docs.push({val:40});
      docs.push({val:50});
      docs.push({val:60});
      docs.push({val:70});
      docs.push({val:80});
      docs.push({val:90});
      docs.push({val:100});
      T(db.bulkSave(docs).ok);
    }
    
    var results = db.query(map, reduceCombine);
    
    var difference = results.rows[0].value.stdDeviation - 28.722813232690143;
    // account for floating point rounding error
    T(Math.abs(difference) < 0.0000000001);
    
  },

  reduce_false: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var numDocs = 5;
    var docs = makeDocs(1,numDocs + 1);
    T(db.bulkSave(docs).ok);
    var summate = function(N) {return (N+1)*N/2;};

    var designDoc = {
      _id:"_design/test",
      language: "javascript",
      views: {
        summate: {map:"function (doc) {emit(doc.integer, doc.integer)};",
                  reduce:"function (keys, values) { return sum(values); };"},
      }
    };
    T(db.save(designDoc).ok);

    // Test that the reduce works
    var res = db.view('test/summate');
    T(res.rows.length == 1 && res.rows[0].value == summate(5));
    
    //Test that we get our docs back
    res = db.view('test/summate', {reduce: false});
    T(res.rows.length == 5);
    for(var i=0; i<5; i++)
    {
      T(res.rows[i].value == i+1);
    }
  },

  multiple_rows: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var nc = {_id:"NC", cities:["Charlotte", "Raleigh"]};
    var ma = {_id:"MA", cities:["Boston", "Lowell", "Worcester", "Cambridge", "Springfield"]};
    var fl = {_id:"FL", cities:["Miami", "Tampa", "Orlando", "Springfield"]};

    T(db.save(nc).ok);
    T(db.save(ma).ok);
    T(db.save(fl).ok);

    var generateListOfCitiesAndState = "function(doc) {" +
    " for (var i = 0; i < doc.cities.length; i++)" +
    "  emit(doc.cities[i] + \", \" + doc._id, null);" +
    "}";

    var results = db.query(generateListOfCitiesAndState);
    var rows = results.rows;

    T(rows[0].key == "Boston, MA");
    T(rows[1].key == "Cambridge, MA");
    T(rows[2].key == "Charlotte, NC");
    T(rows[3].key == "Lowell, MA");
    T(rows[4].key == "Miami, FL");
    T(rows[5].key == "Orlando, FL");
    T(rows[6].key == "Raleigh, NC");
    T(rows[7].key == "Springfield, FL");
    T(rows[8].key == "Springfield, MA");
    T(rows[9].key == "Tampa, FL");
    T(rows[10].key == "Worcester, MA");

    // add another city to NC
    nc.cities.push("Wilmington");
    T(db.save(nc).ok);

    var results = db.query(generateListOfCitiesAndState);
    var rows = results.rows;

    T(rows[0].key == "Boston, MA");
    T(rows[1].key == "Cambridge, MA");
    T(rows[2].key == "Charlotte, NC");
    T(rows[3].key == "Lowell, MA");
    T(rows[4].key == "Miami, FL");
    T(rows[5].key == "Orlando, FL");
    T(rows[6].key == "Raleigh, NC");
    T(rows[7].key == "Springfield, FL");
    T(rows[8].key == "Springfield, MA");
    T(rows[9].key == "Tampa, FL");
    T(rows[10].key == "Wilmington, NC");
    T(rows[11].key == "Worcester, MA");

    // now delete MA
    T(db.deleteDoc(ma).ok);

    var results = db.query(generateListOfCitiesAndState);
    var rows = results.rows;

    T(rows[0].key == "Charlotte, NC");
    T(rows[1].key == "Miami, FL");
    T(rows[2].key == "Orlando, FL");
    T(rows[3].key == "Raleigh, NC");
    T(rows[4].key == "Springfield, FL");
    T(rows[5].key == "Tampa, FL");
    T(rows[6].key == "Wilmington, NC");
  },

  large_docs: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var longtext = "0123456789\n";

    for (var i=0; i<10; i++) {
      longtext = longtext + longtext
    }
    T(db.save({"longtest":longtext}).ok);
    T(db.save({"longtest":longtext}).ok);
    T(db.save({"longtest":longtext}).ok);
    T(db.save({"longtest":longtext}).ok);

    // query all documents, and return the doc.foo member as a key.
    results = db.query(function(doc){
        emit(null, doc.longtest);
    });
  },

  utf8: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var texts = [];

    texts[0] = "1. Ascii: hello"
    texts[1] = "2. Russian: На берегу пустынных волн"
    texts[2] = "3. Math: ∮ E⋅da = Q,  n → ∞, ∑ f(i) = ∏ g(i),"
    texts[3] = "4. Geek: STARGΛ̊TE SG-1"
    texts[4] = "5. Braille: ⡌⠁⠧⠑ ⠼⠁⠒  ⡍⠜⠇⠑⠹⠰⠎ ⡣⠕⠌"

    // check that we can save a reload with full fidelity
    for (var i=0; i<texts.length; i++) {
      T(db.save({_id:i.toString(), text:texts[i]}).ok);
    }

    for (var i=0; i<texts.length; i++) {
      T(db.open(i.toString()).text == texts[i]);
    }

    // check that views and key collation don't blow up
    var rows = db.query(function(doc) { emit(null, doc.text) }).rows;
    for (var i=0; i<texts.length; i++) {
      T(rows[i].value == texts[i]);
    }
  },

  attachments: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var binAttDoc = {
      _id: "bin_doc",
      _attachments:{
        "foo.txt": {
          content_type:"text/plain",
          data: "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
        }
      }
    }

    var save_response = db.save(binAttDoc);
    T(save_response.ok);

    var xhr = CouchDB.request("GET", "/test_suite_db/bin_doc/foo.txt");
    T(xhr.responseText == "This is a base64 encoded text");
    T(xhr.getResponseHeader("Content-Type") == "text/plain");
    T(xhr.getResponseHeader("Etag") == save_response.rev);

    // empty attachment
    var binAttDoc2 = {
      _id: "bin_doc2",
      _attachments:{
        "foo.txt": {
          content_type:"text/plain",
          data: ""
        }
      }
    }

    T(db.save(binAttDoc2).ok);

    var xhr = CouchDB.request("GET", "/test_suite_db/bin_doc2/foo.txt");
    T(xhr.responseText.length == 0);
    T(xhr.getResponseHeader("Content-Type") == "text/plain");

    // test RESTful doc API

    var xhr = CouchDB.request("PUT", "/test_suite_db/bin_doc2/foo2.txt?rev=" + binAttDoc2._rev, {
      body:"This is no base64 encoded text",
      headers:{"Content-Type": "text/plain;charset=utf-8"}
    });
    T(xhr.status == 201);
    var rev = JSON.parse(xhr.responseText).rev;

    binAttDoc2 = db.open("bin_doc2");

    T(binAttDoc2._attachments["foo.txt"] !== undefined);
    T(binAttDoc2._attachments["foo2.txt"] !== undefined);
    T(binAttDoc2._attachments["foo2.txt"].content_type == "text/plain;charset=utf-8");
    T(binAttDoc2._attachments["foo2.txt"].length == 30);

    var xhr = CouchDB.request("GET", "/test_suite_db/bin_doc2/foo2.txt");
    T(xhr.responseText == "This is no base64 encoded text");
    T(xhr.getResponseHeader("Content-Type") == "text/plain;charset=utf-8");
    
    // test without rev, should fail
    var xhr = CouchDB.request("DELETE", "/test_suite_db/bin_doc2/foo2.txt");
    T(xhr.status == 412);

    // test with rev, should not fail
    var xhr = CouchDB.request("DELETE", "/test_suite_db/bin_doc2/foo2.txt?rev=" + rev);
    T(xhr.status == 200);
    
    
    // test binary data
    var bin_data = "JHAPDO*AU£PN ){(3u[d 93DQ9¡€])}    ææøo'∂ƒæ≤çæππ•¥∫¶®#†π¶®¥π€ª®˙π8np";
    var xhr = CouchDB.request("PUT", "/test_suite_db/bin_doc3/attachment.txt", {
      headers:{"Content-Type":"text/plain;charset=utf-8"},
      body:bin_data
    });
    T(xhr.status == 201);
    var rev = JSON.parse(xhr.responseText).rev;
    
    var xhr = CouchDB.request("GET", "/test_suite_db/bin_doc3/attachment.txt");
    T(xhr.responseText == bin_data);
    T(xhr.getResponseHeader("Content-Type") == "text/plain;charset=utf-8");
    
    var xhr = CouchDB.request("PUT", "/test_suite_db/bin_doc3/attachment.txt", {
      headers:{"Content-Type":"text/plain;charset=utf-8"},
      body:bin_data
    });
    T(xhr.status == 412);

    var xhr = CouchDB.request("PUT", "/test_suite_db/bin_doc3/attachment.txt?rev=" + rev, {
      headers:{"Content-Type":"text/plain;charset=utf-8"},
      body:bin_data
    });
    T(xhr.status == 201);
    var rev = JSON.parse(xhr.responseText).rev;

    var xhr = CouchDB.request("GET", "/test_suite_db/bin_doc3/attachment.txt");
    T(xhr.responseText == bin_data);
    T(xhr.getResponseHeader("Content-Type") == "text/plain;charset=utf-8");

    var xhr = CouchDB.request("GET", "/test_suite_db/bin_doc3/attachment.txt?rev=" + rev);
    T(xhr.responseText == bin_data);
    T(xhr.getResponseHeader("Content-Type") == "text/plain;charset=utf-8");

    var xhr = CouchDB.request("DELETE", "/test_suite_db/bin_doc3/attachment.txt?rev=" + rev);
    T(xhr.status == 200);
    
    var xhr = CouchDB.request("GET", "/test_suite_db/bin_doc3/attachment.txt?rev=" + rev);
    T(xhr.status == 404);

    // empty attachments
    var xhr = CouchDB.request("PUT", "/test_suite_db/bin_doc4/attachment.txt", {
      headers:{"Content-Type":"text/plain;charset=utf-8"},
      body:""
    });
    T(xhr.status == 201);
    var rev = JSON.parse(xhr.responseText).rev;

    var xhr = CouchDB.request("GET", "/test_suite_db/bin_doc4/attachment.txt");
    T(xhr.status == 200);
    T(xhr.responseText.length == 0);
    
    // overwrite previsously empty attachment
    var xhr = CouchDB.request("PUT", "/test_suite_db/bin_doc4/attachment.txt?rev=" + rev, {
      headers:{"Content-Type":"text/plain;charset=utf-8"},
      body:"This is a string"
    });
    T(xhr.status == 201);

    var xhr = CouchDB.request("GET", "/test_suite_db/bin_doc4/attachment.txt");
    T(xhr.status == 200);
    T(xhr.responseText == "This is a string");

  },

  attachment_paths : function(debug) {
    if (debug) debugger;
    var dbNames = ["test_suite_db", "test_suite_db/with_slashes"];
    for (var i=0; i < dbNames.length; i++) {
      var db = new CouchDB(dbNames[i]);
      var dbName = encodeURIComponent(dbNames[i]);
      db.deleteDb();
      db.createDb();

      // first just save a regular doc with an attachment that has a slash in the url.
      // (also gonna run an encoding check case)
      var binAttDoc = {
        _id: "bin_doc",
        _attachments:{
          "foo/bar.txt": {
            content_type:"text/plain",
            data: "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
          },
          "foo%2Fbaz.txt": {
            content_type:"text/plain",
            data: "V2UgbGlrZSBwZXJjZW50IHR3byBGLg=="
          }
        }
      }

      T(db.save(binAttDoc).ok);

      var xhr = CouchDB.request("GET", "/"+dbName+"/bin_doc/foo/bar.txt");
      T(xhr.responseText == "This is a base64 encoded text");
      T(xhr.getResponseHeader("Content-Type") == "text/plain");

      // lets try it with an escaped attachment id...
      // weird that it's at two urls
      var xhr = CouchDB.request("GET", "/"+dbName+"/bin_doc/foo%2Fbar.txt");
      T(xhr.status == 200); 
      // xhr.responseText == "This is a base64 encoded text"

      var xhr = CouchDB.request("GET", "/"+dbName+"/bin_doc/foo/baz.txt");
      T(xhr.status == 404);

      var xhr = CouchDB.request("GET", "/"+dbName+"/bin_doc/foo%252Fbaz.txt");
      T(xhr.status == 200); 
      T(xhr.responseText == "We like percent two F.");

      // require a _rev to PUT
      var xhr = CouchDB.request("PUT", "/"+dbName+"/bin_doc/foo/attachment.txt", {
        headers:{"Content-Type":"text/plain;charset=utf-8"},
        body:"Just some text"
      });
      T(xhr.status == 412);    

      var xhr = CouchDB.request("PUT", "/"+dbName+"/bin_doc/foo/bar2.txt?rev=" + binAttDoc._rev, {
        body:"This is no base64 encoded text",
        headers:{"Content-Type": "text/plain;charset=utf-8"}
      });
      T(xhr.status == 201);
      var rev = JSON.parse(xhr.responseText).rev;

      binAttDoc = db.open("bin_doc");

      T(binAttDoc._attachments["foo/bar.txt"] !== undefined);
      T(binAttDoc._attachments["foo%2Fbaz.txt"] !== undefined);
      T(binAttDoc._attachments["foo/bar2.txt"] !== undefined);
      T(binAttDoc._attachments["foo/bar2.txt"].content_type == "text/plain;charset=utf-8");
      T(binAttDoc._attachments["foo/bar2.txt"].length == 30);

      //// now repeat the while thing with a design doc
    
      // first just save a regular doc with an attachment that has a slash in the url.
      // (also gonna run an encoding check case)
      var binAttDoc = {
        _id: "_design/bin_doc",
        _attachments:{
          "foo/bar.txt": {
            content_type:"text/plain",
            data: "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
          },
          "foo%2Fbaz.txt": {
            content_type:"text/plain",
            data: "V2UgbGlrZSBwZXJjZW50IHR3byBGLg=="
          }
        }
      }

      T(db.save(binAttDoc).ok);

      var xhr = CouchDB.request("GET", "/"+dbName+"/_design%2Fbin_doc/foo/bar.txt");
      T(xhr.responseText == "This is a base64 encoded text");
      T(xhr.getResponseHeader("Content-Type") == "text/plain");

      // lets try it with an escaped attachment id...
      // weird that it's at two urls
      var xhr = CouchDB.request("GET", "/"+dbName+"/_design%2Fbin_doc/foo%2Fbar.txt");
      T(xhr.responseText == "This is a base64 encoded text");
      T(xhr.status == 200);

      // err, 3 urls
      var xhr = CouchDB.request("GET", "/"+dbName+"/_design/bin_doc/foo%2Fbar.txt");
      T(xhr.responseText == "This is a base64 encoded text");
      T(xhr.status == 200);

      // I mean um, 4 urls
      var xhr = CouchDB.request("GET", "/"+dbName+"/_design/bin_doc/foo/bar.txt");
      T(xhr.responseText == "This is a base64 encoded text");
      T(xhr.status == 200);

      var xhr = CouchDB.request("GET", "/"+dbName+"/_design%2Fbin_doc/foo/baz.txt");
      T(xhr.status == 404);

      var xhr = CouchDB.request("GET", "/"+dbName+"/_design%2Fbin_doc/foo%252Fbaz.txt");
      T(xhr.status == 200); 
      T(xhr.responseText == "We like percent two F.");

      // require a _rev to PUT
      var xhr = CouchDB.request("PUT", "/"+dbName+"/_design%2Fbin_doc/foo/attachment.txt", {
        headers:{"Content-Type":"text/plain;charset=utf-8"},
        body:"Just some text"
      });
      T(xhr.status == 412);    

      var xhr = CouchDB.request("PUT", "/"+dbName+"/_design%2Fbin_doc/foo/bar2.txt?rev=" + binAttDoc._rev, {
        body:"This is no base64 encoded text",
        headers:{"Content-Type": "text/plain;charset=utf-8"}
      });
      T(xhr.status == 201);
      var rev = JSON.parse(xhr.responseText).rev;

      binAttDoc = db.open("_design/bin_doc");

      T(binAttDoc._attachments["foo/bar.txt"] !== undefined);
      T(binAttDoc._attachments["foo/bar2.txt"] !== undefined);
      T(binAttDoc._attachments["foo/bar2.txt"].content_type == "text/plain;charset=utf-8");
      T(binAttDoc._attachments["foo/bar2.txt"].length == 30);
    }
  },

  attachment_views: function(debug) {

    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    // count attachments in a view

    db.bulkSave(makeDocs(0, 10));

    db.bulkSave(makeDocs(10, 20, {
      _attachments:{
        "foo.txt": {
          content_type:"text/plain",
          data: "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
        }
      }
    }));

    db.bulkSave(makeDocs(20, 30, {
      _attachments:{
        "foo.txt": {
          content_type:"text/plain",
          data: "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
        },
        "bar.txt": {
          content_type:"text/plain",
          data: "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
        }
      }
    }));

    db.bulkSave(makeDocs(30, 40, {
      _attachments:{
        "foo.txt": {
          content_type:"text/plain",
          data: "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
        },
        "bar.txt": {
          content_type:"text/plain",
          data: "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
        },
        "baz.txt": {
          content_type:"text/plain",
          data: "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
        }
      }
    }));

    var mapFunction = function(doc) {
      var count = 0;

      for(var idx in doc._attachments) {
        count = count + 1;
      }

      emit(parseInt(doc._id), count);
    }

    var reduceFunction = function(key, values) {
      return sum(values);
    }
    
    var result = db.query(mapFunction, reduceFunction);

    T(result.rows.length == 1);
    T(result.rows[0].value == 60);

    var result = db.query(mapFunction, reduceFunction, {
      startkey:10,
      endkey:19
    });

    T(result.rows.length == 1);
    T(result.rows[0].value == 10);

    var result = db.query(mapFunction, reduceFunction, {
      startkey:20,
      endkey:29
    });

    T(result.rows.length == 1);
    T(result.rows[0].value == 20);

  },

  design_paths : function(debug) {
    if (debug) debugger;
    var dbNames = ["test_suite_db", "test_suite_db/with_slashes"];
    for (var i=0; i < dbNames.length; i++) {
      var db = new CouchDB(dbNames[i]);
      var dbName = encodeURIComponent(dbNames[i]);
      db.deleteDb();
      db.createDb();
      
      // create a ddoc w bulk_docs
      db.bulkSave([{
        _id : "_design/test",
        views : {
          "testing" : {
            "map" : "function(){emit(1,1)}"
          }
        }
      }]);

      // ddoc is getable
      var xhr = CouchDB.request("GET", "/"+dbName+"/_design/test");
      var resp = JSON.parse(xhr.responseText);
      T(resp._id == "_design/test");

      // it's at 2 urls...
      var xhr = CouchDB.request("GET", "/"+dbName+"/_design%2Ftest");
      var resp = JSON.parse(xhr.responseText);
      T(resp._id == "_design/test");

      // ensure that views are addressable
      resp = db.view("test/testing")
      T(resp.total_rows == 0)

      // create a ddoc by putting to url with raw slash
      var xhr = CouchDB.request("PUT", "/"+dbName+"/_design/test2",{
        body : JSON.stringify({
          _id : "_design/test2",
          views : {
            "testing" : {
              "map" : "function(){emit(1,1)}"
            }
          }
        })
      });

      // ddoc is getable
      var xhr = CouchDB.request("GET", "/"+dbName+"/_design/test2");
      var resp = JSON.parse(xhr.responseText);
      T(resp._id == "_design/test2");

      // it's at 2 urls...
      var xhr = CouchDB.request("GET", "/"+dbName+"/_design%2Ftest2");
      var resp = JSON.parse(xhr.responseText);
      T(resp._id == "_design/test2");

      // ensure that views are addressable
      resp = db.view("test2/testing");
      T(resp.total_rows == 0);
    };
  },

  content_negotiation: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
    var xhr;

    xhr = CouchDB.request("GET", "/test_suite_db/");
    T(xhr.getResponseHeader("Content-Type") == "text/plain;charset=utf-8");

    xhr = CouchDB.request("GET", "/test_suite_db/", {
      headers: {"Accept": "text/html;text/plain;*/*"}
    });
    T(xhr.getResponseHeader("Content-Type") == "text/plain;charset=utf-8");

    xhr = CouchDB.request("GET", "/test_suite_db/", {
      headers: {"Accept": "application/json"}
    });
    T(xhr.getResponseHeader("Content-Type") == "application/json");
  },

  design_docs: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var numDocs = 500;

    function makebigstring(power) {
      var str = "a";
      while(power-- > 0) {
        str = str + str;
      }
      return str;
    }

    var designDoc = {
      _id:"_design/test", // turn off couch.js id escaping?
      language: "javascript",
      views: {
        all_docs_twice: {map: "function(doc) { emit(doc.integer, null); emit(doc.integer, null) }"},
        no_docs: {map: "function(doc) {}"},
        single_doc: {map: "function(doc) { if (doc._id == \"1\") { emit(1, null) }}"},
        summate: {map:"function (doc) {emit(doc.integer, doc.integer)};",
                  reduce:"function (keys, values) { return sum(values); };"},
        summate2: {map:"function (doc) {emit(doc.integer, doc.integer)};",
                  reduce:"function (keys, values) { return sum(values); };"},
        huge_src_and_results: {map: "function(doc) { if (doc._id == \"1\") { emit(\"" + makebigstring(16) + "\", null) }}",
                  reduce:"function (keys, values) { return \"" + makebigstring(16) + "\"; };"}
      }
    }
    T(db.save(designDoc).ok);

    T(db.bulkSave(makeDocs(1, numDocs + 1)).ok);

    // test that the _all_docs view returns correctly with keys
    var results = db.allDocs({startkey:"_design", endkey:"_design0"});
    T(results.rows.length == 1);

    for (var loop = 0; loop < 2; loop++) {
      var rows = db.view("test/all_docs_twice").rows;
      for (var i = 0; i < numDocs; i++) {
        T(rows[2*i].key == i+1);
        T(rows[(2*i)+1].key == i+1);
      }
      T(db.view("test/no_docs").total_rows == 0)
      T(db.view("test/single_doc").total_rows == 1)
      T(db.ensureFullCommit().ok);
      restartServer();
    };
    
    // test when language not specified, Javascript is implied
    var designDoc2 = {
      _id:"_design/test2",
      // language: "javascript", 
      views: {
        single_doc: {map: "function(doc) { if (doc._id == \"1\") { emit(1, null) }}"}
      }
    };
    
    T(db.save(designDoc2).ok);
    T(db.view("test2/single_doc").total_rows == 1);

    var summate = function(N) {return (N+1)*N/2;};
    var result = db.view("test/summate");
    T(result.rows[0].value == summate(numDocs));

    result = db.view("test/summate", {startkey:4,endkey:4});
    T(result.rows[0].value == 4);

    result = db.view("test/summate", {startkey:4,endkey:5});
    T(result.rows[0].value == 9);

    result = db.view("test/summate", {startkey:4,endkey:6});
    T(result.rows[0].value == 15);

    // Verify that a shared index (view def is an exact copy of "summate")
    // does not confuse the reduce stage
    result = db.view("test/summate2", {startkey:4,endkey:6});
    T(result.rows[0].value == 15);

    for(var i=1; i<numDocs/2; i+=30) {
      result = db.view("test/summate", {startkey:i,endkey:numDocs-i});
      T(result.rows[0].value == summate(numDocs-i) - summate(i-1));
    }

    T(db.deleteDoc(designDoc).ok);
    T(db.open(designDoc._id) == null);
    T(db.view("test/no_docs") == null);
    
    T(db.ensureFullCommit().ok);
    restartServer();
    T(db.open(designDoc._id) == null);
    T(db.view("test/no_docs") == null);
  },

  view_collation: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    // NOTE, the values are already in their correct sort order. Consider this
    // a specification of collation of json types.

    var values = []

    // special values sort before all other types
    values.push(null)
    values.push(false)
    values.push(true)

    // then numbers
    values.push(1)
    values.push(2)
    values.push(3.0)
    values.push(4)

    // then text, case sensitive
    values.push("a")
    values.push("A")
    values.push("aa")
    values.push("b")
    values.push("B")
    values.push("ba")
    values.push("bb")

    // then arrays. compared element by element until different.
    // Longer arrays sort after their prefixes
    values.push(["a"])
    values.push(["b"])
    values.push(["b","c"])
    values.push(["b","c", "a"])
    values.push(["b","d"])
    values.push(["b","d", "e"])

    // then object, compares each key value in the list until different.
    // larger objects sort after their subset objects.
    values.push({a:1})
    values.push({a:2})
    values.push({b:1})
    values.push({b:2})
    values.push({b:2, a:1}) // Member order does matter for collation.
                            // CouchDB preserves member order
                            // but doesn't require that clients will.
                            // (this test might fail if used with a js engine
                            // that doesn't preserve order)
    values.push({b:2, c:2})

    for (var i=0; i<values.length; i++) {
      db.save({_id:(i).toString(), foo:values[i]});
    }

    var queryFun = function(doc) { emit(doc.foo, null); }
    var rows = db.query(queryFun).rows;
    for (i=0; i<values.length; i++) {
      T(equals(rows[i].key, values[i]))
    }

    // everything has collated correctly. Now to check the descending output
    rows = db.query(queryFun, null, {descending: true}).rows
    for (i=0; i<values.length; i++) {
      T(equals(rows[i].key, values[values.length - 1 -i]))
    }

    // now check the key query args
    for (i=1; i<values.length; i++) {
      var queryOptions = {key:values[i]}
      rows = db.query(queryFun, null, queryOptions).rows;
      T(rows.length == 1 && equals(rows[0].key, values[i]))
    }
  },

  view_conflicts: function(debug) {
    var dbA = new CouchDB("test_suite_db_a");
    dbA.deleteDb();
    dbA.createDb();
    var dbB = new CouchDB("test_suite_db_b");
    dbB.deleteDb();
    dbB.createDb();
    if (debug) debugger;

    var docA = {_id: "foo", bar: 42};
    T(dbA.save(docA).ok);
    CouchDB.replicate(dbA.name, dbB.name);

    var docB = dbB.open("foo");
    docB.bar = 43;
    dbB.save(docB);
    docA.bar = 41;
    dbA.save(docA);
    CouchDB.replicate(dbA.name, dbB.name);

    var doc = dbB.open("foo", {conflicts: true});
    T(doc._conflicts.length == 1);
    var conflictRev = doc._conflicts[0];
    if (doc.bar == 41) { // A won
      T(conflictRev == docB._rev);
    } else { // B won
      T(doc.bar == 43);
      T(conflictRev == docA._rev);
    }

    var results = dbB.query(function(doc) {
      if (doc._conflicts) {
        emit(doc._id, doc._conflicts);
      }
    });
    T(results.rows[0].value[0] == conflictRev);
  },

  view_errors: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var doc = {integer: 1, string: "1", array: [1, 2, 3]};
    T(db.save(doc).ok);

    // emitting a key value that is undefined should result in that row not
    // being included in the view results
    var results = db.query(function(doc) {
      emit(doc.undef, null);
    });
    T(results.total_rows == 0);

    // if a view function throws an exception, its results are not included in
    // the view index, but the view does not itself raise an error
    var results = db.query(function(doc) {
      doc.undef(); // throws an error
    });
    T(results.total_rows == 0);

    // if a view function includes an undefined value in the emitted key or
    // value, an error is logged and the result is not included in the view
    // index, and the view itself does not raise an error
    var results = db.query(function(doc) {
      emit([doc._id, doc.undef], null);
    });
    T(results.total_rows == 0);
  },

  view_include_docs: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var docs = makeDocs(0, 100);
    T(db.bulkSave(docs).ok);

    var designDoc = {
      _id:"_design/test",
      language: "javascript",
      views: {
        all_docs: {
          map: "function(doc) { emit(doc.integer, doc.string) }"
        },
        with_prev: {
          map: "function(doc){if(doc.prev) emit(doc._id,{'_rev':doc.prev}); else emit(doc._id,{'_rev':doc._rev});}"
        },
        summate: {
          map:"function (doc) {emit(doc.integer, doc.integer)};",
          reduce:"function (keys, values) { return sum(values); };"
        }
      }
    }
    T(db.save(designDoc).ok);

    var resp = db.view('test/all_docs', {include_docs: true, limit: 2});
    T(resp.rows.length == 2);
    T(resp.rows[0].id == "0");
    T(resp.rows[0].doc._id == "0");
    T(resp.rows[1].id == "1");
    T(resp.rows[1].doc._id == "1");

    resp = db.view('test/all_docs', {include_docs: true}, [29, 74]);
    T(resp.rows.length == 2);
    T(resp.rows[0].doc._id == "29");
    T(resp.rows[1].doc.integer == 74);

    resp = db.allDocs({limit: 2, skip: 1, include_docs: true});
    T(resp.rows.length == 2);
    T(resp.rows[0].doc.integer == 1);
    T(resp.rows[1].doc.integer == 10);

    resp = db.allDocs({include_docs: true}, ['not_a_doc']);
    T(resp.rows.length == 1);
    T(!resp.rows[0].doc);

    resp = db.allDocs({include_docs: true}, ["1", "foo"]);
    T(resp.rows.length == 2);
    T(resp.rows[0].doc.integer == 1);
    T(!resp.rows[1].doc);

    resp = db.allDocs({include_docs: true, limit: 0});
    T(resp.rows.length == 0);

    // No reduce support
    try {
        resp = db.view('test/summate', {include_docs: true});
        alert(JSON.stringify(resp));
        T(0==1);
    } catch (e) {
        T(e.error == 'query_parse_error');
    }

    // Reduce support when reduce=false
    resp = db.view('test/summate', {reduce: false, include_docs: true});
    T(resp.rows.length == 100);

    // Check emitted _rev controls things
    resp = db.allDocs({include_docs: true}, ["0"]);
    var before = resp.rows[0].doc;
    var after = db.open("0");
    after.integer = 100
    after.prev = after._rev;
    db.save(after);
    after = db.open("0");
    T(after._rev != after.prev);
    T(after.integer == 100);

    // should emit the previous revision
    resp = db.view("test/with_prev", {include_docs: true}, ["0"]);
    T(resp.rows[0].doc._id == "0");
    T(resp.rows[0].doc._rev == before._rev);
    T(!resp.rows[0].doc.prev);
    T(resp.rows[0].doc.integer == 0);

    var xhr = CouchDB.request("POST", "/test_suite_db/_compact");
    T(xhr.status == 202)
    while (db.info().compact_running) {}

    resp = db.view("test/with_prev", {include_docs: true}, ["0", "23"]);
    T(resp.rows.length == 2);
    T(resp.rows[0].key == "0");
    T(resp.rows[0].id == "0");
    T(!resp.rows[0].doc);
    T(resp.rows[0].error == "missing");
    T(resp.rows[1].doc.integer == 23);
  },

  view_multi_key_all_docs: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var docs = makeDocs(0, 100);
    T(db.bulkSave(docs).ok);

    var keys = ["10","15","30","37","50"];
    var rows = db.allDocs({},keys).rows;
    T(rows.length == keys.length);
    for(var i=0; i<rows.length; i++)
      T(rows[i].id == keys[i]);

    rows = db.allDocs({limit: 1}, keys).rows;
    T(rows.length == 1);
    T(rows[0].id == keys[0]);

    rows = db.allDocs({skip: 2}, keys).rows;
    T(rows.length == 3);
    for(var i=0; i<rows.length; i++)
        T(rows[i].id == keys[i+2]);

    rows = db.allDocs({descending: "true"}, keys).rows;
    T(rows.length == keys.length);
    for(var i=0; i<rows.length; i++)
        T(rows[i].id == keys[keys.length-i-1]);

    rows = db.allDocs({descending: "true", skip: 3, limit:1}, keys).rows;
    T(rows.length == 1);
    T(rows[0].id == keys[1]);

    // Check we get invalid rows when the key doesn't exist
    rows = db.allDocs({}, [1, "i_dont_exist", "0"]).rows;
    T(rows.length == 3);
    T(rows[0].error == "not_found");
    T(!rows[0].id);
    T(rows[1].error == "not_found");
    T(!rows[1].id);
    T(rows[2].id == rows[2].key && rows[2].key == "0");
  },

  view_multi_key_design: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var docs = makeDocs(0, 100);
    T(db.bulkSave(docs).ok);

    var designDoc = {
      _id:"_design/test",
      language: "javascript",
      views: {
        all_docs: {
          map: "function(doc) { emit(doc.integer, doc.string) }"
        },
        multi_emit: {
          map: "function(doc) {for(var i = 0 ; i < 3 ; i++) { emit(i, doc.integer) ; } }"
        },
        summate: {
          map:"function (doc) {emit(doc.integer, doc.integer)};",
          reduce:"function (keys, values) { return sum(values); };"
        }
      }
    }
    T(db.save(designDoc).ok);

    // Test that missing keys work too
    var keys = [101,30,15,37,50]
    var reduce = db.view("test/summate",{group:true},keys).rows;
    T(reduce.length == keys.length-1); // 101 is missing
    for(var i=0; i<reduce.length; i++) {
      T(keys.indexOf(reduce[i].key) != -1);
      T(reduce[i].key == reduce[i].value);
    }

    // First, the goods:
    var keys = [10,15,30,37,50];
    var rows = db.view("test/all_docs",{},keys).rows;
    for(var i=0; i<rows.length; i++) {
      T(keys.indexOf(rows[i].key) != -1);
      T(rows[i].key == rows[i].value);
    }
    
    var reduce = db.view("test/summate",{group:true},keys).rows;
    T(reduce.length == keys.length);
    for(var i=0; i<reduce.length; i++) {
      T(keys.indexOf(reduce[i].key) != -1);
      T(reduce[i].key == reduce[i].value);
    }

    // Test that invalid parameter combinations get rejected
    var badargs = [{startkey:0}, {endkey:0}, {key: 0}, {group_level: 2}];
    for(var i in badargs)
    {
        try {
            db.view("test/all_docs",badargs[i],keys);
            T(0==1);
        } catch (e) {
            T(e.error == "query_parse_error");
        }
    }

    try {
        db.view("test/summate",{},keys);
        T(0==1);
    } catch (e) {
        T(e.error == "query_parse_error");
    }

    // Test that a map & reduce containing func support keys when reduce=false
    resp = db.view("test/summate", {reduce: false}, keys);
    T(resp.rows.length == 5);

    // Check that limiting by startkey_docid and endkey_docid get applied
    // as expected.
    var curr = db.view("test/multi_emit", {startkey_docid: 21, endkey_docid: 23}, [0, 2]).rows;
    var exp_key = [ 0,  0,  0,  2,  2,  2] ;
    var exp_val = [21, 22, 23, 21, 22, 23] ;
    T(curr.length == 6);
    for( var i = 0 ; i < 6 ; i++)
    {
        T(curr[i].key == exp_key[i]);
        T(curr[i].value == exp_val[i]);
    }

    // Check limit works
    curr = db.view("test/all_docs", {limit: 1}, keys).rows;
    T(curr.length == 1);
    T(curr[0].key == 10);

    // Check offset works
    curr = db.view("test/multi_emit", {skip: 1}, [0]).rows;
    T(curr.length == 99);
    T(curr[0].value == 1);

    // Check that dir works
    curr = db.view("test/multi_emit", {descending: "true"}, [1]).rows;
    T(curr.length == 100);
    T(curr[0].value == 99);
    T(curr[99].value == 0);

    // Check a couple combinations
    curr = db.view("test/multi_emit", {descending: "true", skip: 3, limit: 2}, [2]).rows;
    T(curr.length, 2);
    T(curr[0].value == 96);
    T(curr[1].value == 95);

    curr = db.view("test/multi_emit", {skip: 2, limit: 3, startkey_docid: "13"}, [0]).rows;
    T(curr.length == 3);
    T(curr[0].value == 15);
    T(curr[1].value == 16);
    T(curr[2].value == 17);

    curr = db.view("test/multi_emit",
            {skip: 1, limit: 5, startkey_docid: "25", endkey_docid: "27"}, [1]).rows;
    T(curr.length == 2);
    T(curr[0].value == 26);
    T(curr[1].value == 27);

    curr = db.view("test/multi_emit",
            {skip: 1, limit: 5, startkey_docid: "28", endkey_docid: "26", descending: "true"}, [1]).rows;
    T(curr.length == 2);
    T(curr[0].value == 27);
    T(curr[1].value == 26);
  },

  view_multi_key_temp: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var docs = makeDocs(0, 100);
    T(db.bulkSave(docs).ok);

    var queryFun = function(doc) { emit(doc.integer, doc.integer) };
    var reduceFun = function (keys, values) { return sum(values); };

    var keys = [10,15,30,37,50];
    var rows = db.query(queryFun, null, {}, keys).rows;
    for(var i=0; i<rows.length; i++) {
      T(keys.indexOf(rows[i].key) != -1);
      T(rows[i].key == rows[i].value);
    }
    
    var reduce = db.query(queryFun, reduceFun, {group:true}, keys).rows;
    for(var i=0; i<reduce.length; i++) {
      T(keys.indexOf(reduce[i].key) != -1);
      T(reduce[i].key == reduce[i].value);
    }
  },

  view_pagination: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var docs = makeDocs(0, 100);
    T(db.bulkSave(docs).ok);

    var queryFun = function(doc) { emit(doc.integer, null) };
    var i;

    // page through the view ascending
    for (i = 0; i < docs.length; i += 10) {
      var queryResults = db.query(queryFun, null, {
        startkey: i,
        startkey_docid: i,
        limit: 10
      });
      T(queryResults.rows.length == 10)
      T(queryResults.total_rows == docs.length)
      T(queryResults.offset == i)
      var j;
      for (j = 0; j < 10;j++) {
        T(queryResults.rows[j].key == i + j);
      }
    }

    // page through the view descending
    for (i = docs.length - 1; i >= 0; i -= 10) {
      var queryResults = db.query(queryFun, null, {
        startkey: i,
        startkey_docid: i,
        descending: true,
        limit: 10
      });
      T(queryResults.rows.length == 10)
      T(queryResults.total_rows == docs.length)
      T(queryResults.offset == docs.length - i - 1)
      var j;
      for (j = 0; j < 10; j++) {
        T(queryResults.rows[j].key == i - j);
      }
    }

    // ignore decending=false. CouchDB should just ignore that.
    for (i = 0; i < docs.length; i += 10) {
      var queryResults = db.query(queryFun, null, {
        startkey: i,
        startkey_docid: i,
        descending: false,
        limit: 10
      });
      T(queryResults.rows.length == 10)
      T(queryResults.total_rows == docs.length)
      T(queryResults.offset == i)
      var j;
      for (j = 0; j < 10;j++) {
        T(queryResults.rows[j].key == i + j);
      }
    }
    
    // test endkey_docid
    var queryResults = db.query(function(doc) { emit(null, null);}, null, {
      startkey: null,
      startkey_docid: 1,
      endkey: null,
      endkey_docid: 40
    });
    
    T(queryResults.rows.length == 35)
    T(queryResults.total_rows == docs.length)
    T(queryResults.offset == 1)
    T(queryResults.rows[0].id == "1");
    T(queryResults.rows[1].id == "10");
    T(queryResults.rows[2].id == "11");
    T(queryResults.rows[3].id == "12");
    T(queryResults.rows[4].id == "13");
    T(queryResults.rows[5].id == "14");
    T(queryResults.rows[6].id == "15");
    T(queryResults.rows[7].id == "16");
    T(queryResults.rows[8].id == "17");
    T(queryResults.rows[9].id == "18");
    T(queryResults.rows[10].id == "19");
    T(queryResults.rows[11].id == "2");
    T(queryResults.rows[12].id == "20");
    T(queryResults.rows[13].id == "21");
    T(queryResults.rows[14].id == "22");
    T(queryResults.rows[15].id == "23");
    T(queryResults.rows[16].id == "24");
    T(queryResults.rows[17].id == "25");
    T(queryResults.rows[18].id == "26");
    T(queryResults.rows[19].id == "27");
    T(queryResults.rows[20].id == "28");
    T(queryResults.rows[21].id == "29");
    T(queryResults.rows[22].id == "3");
    T(queryResults.rows[23].id == "30");
    T(queryResults.rows[24].id == "31");
    T(queryResults.rows[25].id == "32");
    T(queryResults.rows[26].id == "33");
    T(queryResults.rows[27].id == "34");
    T(queryResults.rows[28].id == "35");
    T(queryResults.rows[29].id == "36");
    T(queryResults.rows[30].id == "37");
    T(queryResults.rows[31].id == "38");
    T(queryResults.rows[32].id == "39");
    T(queryResults.rows[33].id == "4");
    T(queryResults.rows[34].id == "40");

  },

  view_sandboxing: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var doc = {integer: 1, string: "1", array: [1, 2, 3]};
    T(db.save(doc).ok);
/*
    // make sure that attempting to change the document throws an error
    var results = db.query(function(doc) {
      doc.integer = 2;
      emit(null, doc);
    });
    T(results.total_rows == 0);

    var results = db.query(function(doc) {
      doc.array[0] = 0;
      emit(null, doc);
    });
    T(results.total_rows == 0);
*/
    // make sure that a view cannot invoke interpreter internals such as the
    // garbage collector
    var results = db.query(function(doc) {
      gc();
      emit(null, doc);
    });
    T(results.total_rows == 0);

    // make sure that a view cannot access the map_funs array defined used by
    // the view server
    var results = db.query(function(doc) { map_funs.push(1); emit(null, doc) });
    T(results.total_rows == 0);

    // make sure that a view cannot access the map_results array defined used by
    // the view server
    var results = db.query(function(doc) { map_results.push(1); emit(null, doc) });
    T(results.total_rows == 0);
  },

  view_xml: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    db.save({content: "<doc><title id='xml'>Testing XML</title></doc>"});
    db.save({content: "<doc><title id='e4x'>Testing E4X</title></doc>"});

    var results = db.query(
      "function(doc) {\n" +
      "  var xml = new XML(doc.content);\n" +
      "  emit(xml.title.text(), null);\n" +
      "}");
    T(results.total_rows == 2);
    T(results.rows[0].key == "Testing E4X");
    T(results.rows[1].key == "Testing XML");

    var results = db.query(
      "function(doc) {\n" +
      "  var xml = new XML(doc.content);\n" +
      "  emit(xml.title.@id, null);\n" +
      "}");
    T(results.total_rows == 2);
    T(results.rows[0].key == "e4x");
    T(results.rows[1].key == "xml");
  },

  replication: function(debug) {
    if (debug) debugger;
    var host = CouchDB.host;
    var dbPairs = [
      {source:"test_suite_db_a",
        target:"test_suite_db_b"},
      {source:"test_suite_db_a",
        target:"http://" + host + "/test_suite_db_b"},
      {source:"http://" + host + "/test_suite_db_a",
        target:"test_suite_db_b"},
      {source:"http://" + host + "/test_suite_db_a",
        target:"http://" + host + "/test_suite_db_b"}
    ]
    var dbA = new CouchDB("test_suite_db_a");
    var dbB = new CouchDB("test_suite_db_b");
    var numDocs = 10;
    var xhr;
    for (var testPair = 0; testPair < dbPairs.length; testPair++) {
      var A = dbPairs[testPair].source
      var B = dbPairs[testPair].target

      dbA.deleteDb();
      dbA.createDb();
      dbB.deleteDb();
      dbB.createDb();
      
      var repTests = {
        // copy and paste and put your code in. delete unused steps.
        test_template: new function () {
          this.init = function(dbA, dbB) {
            // before anything has happened
          }
          this.afterAB1 = function(dbA, dbB) {
            // called after replicating src=A  tgt=B first time.
          };
          this.afterBA1 = function(dbA, dbB) {
            // called after replicating src=B  tgt=A first time.
          };
          this.afterAB2 = function(dbA, dbB) {
            // called after replicating src=A  tgt=B second time. 
          };
          this.afterBA2 = function(dbA, dbB) {
            // etc...
          };
        },
        
        simple_test: new function () {
          this.init = function(dbA, dbB) {
            var docs = makeDocs(0, numDocs);
            T(dbA.bulkSave(docs).ok);
          };
        
          this.afterAB1 = function(dbA, dbB) {          
            for (var j = 0; j < numDocs; j++) {
              var docA = dbA.open("" + j);
              var docB = dbB.open("" + j);
              T(docA._rev == docB._rev);
            }
          };
        },
      
       deletes_test: new function () {
          this.init = function(dbA, dbB) {
            T(dbA.save({_id:"foo1",value:"a"}).ok);
          };
          
          this.afterAB1 = function(dbA, dbB) {
            var docA = dbA.open("foo1");
            var docB = dbB.open("foo1");
            T(docA._rev == docB._rev);

            dbA.deleteDoc(docA);
          };
          
          this.afterAB2 = function(dbA, dbB) {
            T(dbA.open("foo1") == null);
            T(dbB.open("foo1") == null);
          };
        },
        
        slashes_in_ids_test: new function () {
          // make sure docs with slashes in id replicate properly
          this.init = function(dbA, dbB) {
            dbA.save({ _id:"abc/def", val:"one" });
          };
          
          this.afterAB1 = function(dbA, dbB) {
            var docA = dbA.open("abc/def");
            var docB = dbB.open("abc/def");
            T(docA._rev == docB._rev);
          };
        },
      
        attachments_test: new function () {
          // Test attachments
          this.init = function(dbA, dbB) {
            dbA.save({
              _id:"bin_doc",
              _attachments:{
                "foo.txt": {
                  "type":"base64",
                  "data": "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
                }
              }
            });
          };
          
          this.afterAB1 = function(dbA, dbB) {
            var xhr = CouchDB.request("GET", "/test_suite_db_a/bin_doc/foo.txt");
            T(xhr.responseText == "This is a base64 encoded text")

            xhr = CouchDB.request("GET", "/test_suite_db_b/bin_doc/foo.txt");
            T(xhr.responseText == "This is a base64 encoded text")
          };
        },
        
        conflicts_test: new function () {
          // test conflicts
          this.init = function(dbA, dbB) {
            dbA.save({_id:"foo",value:"a"});
            dbB.save({_id:"foo",value:"b"});
          };
          
          this.afterBA1 = function(dbA, dbB) {            
            var docA = dbA.open("foo", {conflicts: true});
            var docB = dbB.open("foo", {conflicts: true});

            // make sure the same rev is in each db
            T(docA._rev === docB._rev);

            // make sure the conflicts are the same in each db
            T(docA._conflicts[0] === docB._conflicts[0]);

            // delete a conflict.
            dbA.deleteDoc({_id:"foo", _rev:docA._conflicts[0]});
          };
          
          this.afterBA2 = function(dbA, dbB) {            
            // open documents and include the conflict meta data
            var docA = dbA.open("foo", {conflicts: true});
            var docB = dbB.open("foo", {conflicts: true});

            // We should have no conflicts this time
            T(docA._conflicts === undefined)
            T(docB._conflicts === undefined);
          };
        }
      };

      var test;
      for(test in repTests) {
        if(repTests[test].init) {
          repTests[test].init(dbA, dbB);
        }
      }

      T(CouchDB.replicate(A, B).ok);

      for(test in repTests) {
        if(repTests[test].afterAB1) repTests[test].afterAB1(dbA, dbB);
      }

      T(CouchDB.replicate(B, A).ok);

      for(test in repTests) {
        if(repTests[test].afterBA1) repTests[test].afterBA1(dbA, dbB);
      }

      T(CouchDB.replicate(A, B).ok);

      for(test in repTests) {
        if(repTests[test].afterAB2) repTests[test].afterAB2(dbA, dbB);
      }

      T(CouchDB.replicate(B, A).ok);

      for(test in repTests) {
        if(repTests[test].afterBA2) repTests[test].afterBA2(dbA, dbB);
      }

    }
  },

  etags_head: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;

    var xhr;

    // create a new doc
    xhr = CouchDB.request("PUT", "/test_suite_db/1", {
      body: "{}"
    });
    T(xhr.status == 201);

    // extract the ETag header values
    var etag = xhr.getResponseHeader("etag")

    // get the doc and verify the headers match
    xhr = CouchDB.request("GET", "/test_suite_db/1");
    T(etag == xhr.getResponseHeader("etag"));

    // 'head' the doc and verify the headers match
    xhr = CouchDB.request("HEAD", "/test_suite_db/1", {
      headers: {"if-none-match": "s"}
    });
    T(etag == xhr.getResponseHeader("etag"));

    // replace a doc
    xhr = CouchDB.request("PUT", "/test_suite_db/1", {
      body: "{}",
      headers: {"if-match": etag}
    });
    T(xhr.status == 201);

    // extract the new ETag value
    var etagOld= etag;
    etag = xhr.getResponseHeader("etag")

    // fail to replace a doc
    xhr = CouchDB.request("PUT", "/test_suite_db/1", {
      body: "{}"
    });
    T(xhr.status == 412)

    // verify get w/Etag
    xhr = CouchDB.request("GET", "/test_suite_db/1", {
      headers: {"if-none-match": etagOld}
    });
    T(xhr.status == 200);
    xhr = CouchDB.request("GET", "/test_suite_db/1", {
      headers: {"if-none-match": etag}
    });
    T(xhr.status == 304);

    // fail to delete a doc
    xhr = CouchDB.request("DELETE", "/test_suite_db/1", {
      headers: {"if-match": etagOld}
    });
    T(xhr.status == 412);

    //now do it for real
    xhr = CouchDB.request("DELETE", "/test_suite_db/1", {
      headers: {"if-match": etag}
    });
    T(xhr.status == 200)
  },

   show_documents: function(debug) {
     var db = new CouchDB("test_suite_db");
     db.deleteDb();
     db.createDb();
     if (debug) debugger;
     
     function stringFun(fun) {
       var string = fun.toSource ? fun.toSource() : "(" + fun.toString() + ")";
       return string;
     }
         
     var designDoc = {
       _id:"_design/template",
       language: "javascript",
       shows: {
         "hello" : stringFun(function(doc) { 
           if (doc) {
             return "Hello World";             
           } else {
             return "Empty World";
           }
         }),
         "just-name" : stringFun(function(doc, req) {
           return {
             body : "Just " + doc.name
           };
         }),
         "req-info" : stringFun(function(doc, req) {
           return {
             json : req
           }
         }),
         "xml-type" : stringFun(function(doc, req) {
            return {
              "headers" : {
                "Content-Type" : "application/xml"
              },
              "body" : new XML('<xml><node foo="bar"/></xml>')
            }
          }),
         "no-set-etag" : stringFun(function(doc, req) {
           return {
             headers : {
               "Etag" : "skipped"
             },
             "body" : "something"
           }
         }),
         "accept-switch" : stringFun(function(doc, req) {
           if (req.headers["Accept"].match(/image/)) {
             return {
               // a 16x16 px version of the CouchDB logo
               "base64" : 
["iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAsV",
"BMVEUAAAD////////////////////////5ur3rEBn////////////////wDBL/",
"AADuBAe9EB3IEBz/7+//X1/qBQn2AgP/f3/ilpzsDxfpChDtDhXeCA76AQH/v7",
"/84eLyWV/uc3bJPEf/Dw/uw8bRWmP1h4zxSlD6YGHuQ0f6g4XyQkXvCA36MDH6",
"wMH/z8/yAwX64ODeh47BHiv/Ly/20dLQLTj98PDXWmP/Pz//39/wGyJ7Iy9JAA",
"AADHRSTlMAbw8vf08/bz+Pv19jK/W3AAAAg0lEQVR4Xp3LRQ4DQRBD0QqTm4Y5",
"zMxw/4OleiJlHeUtv2X6RbNO1Uqj9g0RMCuQO0vBIg4vMFeOpCWIWmDOw82fZx",
"vaND1c8OG4vrdOqD8YwgpDYDxRgkSm5rwu0nQVBJuMg++pLXZyr5jnc1BaH4GT",
"LvEliY253nA3pVhQqdPt0f/erJkMGMB8xucAAAAASUVORK5CYII="].join(''),
               headers : {
                 "Content-Type" : "image/png",
                 "Vary" : "Accept" // we set this for proxy caches
               }
             };
           } else {
             return {
               "body" : "accepting text requests",
               headers : {
                 "Content-Type" : "text/html",
                 "Vary" : "Accept"
               }
             };
           }
         }),
         "respondWith" : stringFun(function(doc, req) {
           registerType("foo", "application/foo","application/x-foo");
           return respondWith(req, {
             html : function() {
               return {
                 body:"Ha ha, you said \"" + doc.word + "\"."
               };
             },
             xml : function() {
               var xml = new XML('<xml><node/></xml>');
               // Becase Safari can't stand to see that dastardly
               // E4X outside of a string. Outside of tests you
               // can just use E4X literals.
               this.eval('xml.node.@foo = doc.word');
               return {
                 body: xml
               };
             },
             foo : function() {
               return {
                 body: "foofoo"
               };
             },
             fallback : "html"
           });
         })
       }
     };
     T(db.save(designDoc).ok);
     
     var doc = {"word":"plankton", "name":"Rusty"}
     var resp = db.save(doc);
     T(resp.ok);
     var docid = resp.id;
 
     // show error
     var xhr = CouchDB.request("GET", "/test_suite_db/_show/");
     T(xhr.status == 404);
     T(JSON.parse(xhr.responseText).reason == "Invalid path.");
 
     // hello template world
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/hello/"+docid);
     T(xhr.responseText == "Hello World");

     // hello template world (no docid)
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/hello");
     T(xhr.responseText == "Empty World");

     
     // show with doc
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/just-name/"+docid);
     T(xhr.responseText == "Just Rusty");
     
     // show with missing doc
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/just-name/missingdoc");
     T(xhr.status == 404);
     var resp = JSON.parse(xhr.responseText);
     T(resp.error == "not_found");
     T(resp.reason == "missing");
     
     // show with missing func
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/missing/"+docid);
     T(xhr.status == 404);
     
     // missing design doc
     xhr = CouchDB.request("GET", "/test_suite_db/_show/missingdoc/just-name/"+docid);
     T(xhr.status == 404);
     var resp = JSON.parse(xhr.responseText);
     T(resp.error == "not_found");
     
     // query parameters
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/req-info/"+docid+"?foo=bar", {
       headers: {
         "Accept": "text/html;text/plain;*/*",
         "X-Foo" : "bar"
       }
     });
     var resp = JSON.parse(xhr.responseText);
     T(equals(resp.headers["X-Foo"], "bar"));
     T(equals(resp.query, {foo:"bar"}));
     T(equals(resp.verb, "GET"));
     T(equals(resp.path[4], docid));
     T(equals(resp.info.db_name, "test_suite_db"));
     
     // returning a content-type
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/xml-type/"+docid);
     T("application/xml" == xhr.getResponseHeader("Content-Type"));
     T("Accept" == xhr.getResponseHeader("Vary"));
 
     // accept header switching
     // different mime has different etag
     
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/accept-switch/"+docid, {
       headers: {"Accept": "text/html;text/plain;*/*"}
     });
     T("text/html" == xhr.getResponseHeader("Content-Type"));
     T("Accept" == xhr.getResponseHeader("Vary"));
     var etag = xhr.getResponseHeader("etag");

     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/accept-switch/"+docid, {
       headers: {"Accept": "image/png;*/*"}
     });
     T(xhr.responseText.match(/PNG/))
     T("image/png" == xhr.getResponseHeader("Content-Type"));
     var etag2 = xhr.getResponseHeader("etag");
     T(etag2 != etag);
 
     // proper etags
     // show with doc
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/just-name/"+docid);
     // extract the ETag header values
     etag = xhr.getResponseHeader("etag");
     // get again with etag in request
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/just-name/"+docid, {
       headers: {"if-none-match": etag}
     });
     // should be 304
     T(xhr.status == 304);    
 
     // update the doc
     doc.name = "Crusty";
     resp = db.save(doc);
     T(resp.ok);
     // req with same etag
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/just-name/"+docid, {
       headers: {"if-none-match": etag}
     });
     // status is 200    
     T(xhr.status == 200);
 
     // get new etag and request again
     etag = xhr.getResponseHeader("etag");
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/just-name/"+docid, {
       headers: {"if-none-match": etag}
     });
     // should be 304
     T(xhr.status == 304);
 
     // update design doc (but not function)
     designDoc.isChanged = true;
     T(db.save(designDoc).ok);
     
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/just-name/"+docid, {
       headers: {"if-none-match": etag}
     });
     // should be 304
     T(xhr.status == 304);
     
     // update design doc function
     designDoc.shows["just-name"] = (function(doc, req) {
       return {
         body : "Just old " + doc.name
       };
     }).toString();
     T(db.save(designDoc).ok);
 
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/just-name/"+docid, {
       headers: {"if-none-match": etag}
     });
     // status is 200    
     T(xhr.status == 200);
     
     
     // JS can't set etag
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/no-set-etag/"+docid);
     // extract the ETag header values
     etag = xhr.getResponseHeader("etag");
     T(etag != "skipped")
 
     // test the respondWith mime matcher
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/respondWith/"+docid, {
       headers: {
         "Accept": 'text/html,application/atom+xml; q=0.9'
       }
     });
     T(xhr.getResponseHeader("Content-Type") == "text/html");
     T(xhr.responseText == "Ha ha, you said \"plankton\".");
 
     // now with xml
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/respondWith/"+docid, {
       headers: {
         "Accept": 'application/xml'
       }
     });
     T(xhr.getResponseHeader("Content-Type") == "application/xml");
     T(xhr.responseText.match(/node/));
     T(xhr.responseText.match(/plankton/));
     
     // registering types works
     xhr = CouchDB.request("GET", "/test_suite_db/_show/template/respondWith/"+docid, {
       headers: {
         "Accept": "application/x-foo"
       }
     });
     T(xhr.getResponseHeader("Content-Type") == "application/x-foo");
     T(xhr.responseText.match(/foofoo/));
   },

  list_views : function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
    
    function stringFun(fun) {
      var string = fun.toSource ? fun.toSource() : "(" + fun.toString() + ")";
      return string;
    }
        
    var designDoc = {
      _id:"_design/lists",
      language: "javascript",
      views : {
        basicView : {
          map : stringFun(function(doc) {
            emit(doc.integer, doc.string);
          })
        },
        withReduce : {
          map : stringFun(function(doc) {
            emit(doc.integer, doc.string);
          }),
          reduce : stringFun(function(keys, values, rereduce) {
            if (rereduce) {
              return sum(values);
            } else {
              return values.length;
            }
          })
        }
      },
      lists: {
        simpleForm: stringFun(function(head, row, req) {
          if (row) {
            // we ignore headers on rows and tail
            return {body : '\n<li>Key: '+row.key+' Value: '+row.value+'</li>'};
          } else if (head) {
            // we return an object (like those used by external and show)
            // so that we can specify headers
            return {
              body : '<h1>Total Rows: '
                + head.total_rows
                + ' Offset: ' + head.offset
                + '</h1><ul>'
            };
          } else {
            // tail
            return {body : '</ul>'};
          }
        }),
        acceptSwitch: stringFun(function(head, row, req) {
          return respondWith(req, {
            html : function() {
              // If you're outputting text and you're not setting
              // any headers, you can just return a string.
              if (head) {
                return "HTML <ul>";
              } else if (row) {
                return '\n<li>Key: '
                  +row.key+' Value: '+row.value+'</li>';
              } else { // tail
                return "</ul>";
              }
            },
            xml : function() {
              if (head) {
                return '<feed xmlns="http://www.w3.org/2005/Atom">'
                  +'<title>Test XML Feed</title>';
              } else if (row) {
                // Becase Safari can't stand to see that dastardly
                // E4X outside of a string. Outside of tests you
                // can just use E4X literals.
                var entry = new XML('<entry/>');
                entry.id = row.id;
                entry.title = row.key;
                entry.content = row.value;
                // We'll also let you return just an E4X object
                // if you aren't setting headers.
                return entry;
              } else {
                return "</feed>";
              }
            }
          })
        })
      }
    };

    T(db.save(designDoc).ok);
    
    var docs = makeDocs(0, 10);
    var saveResult = db.bulkSave(docs);
    T(saveResult.ok);
    
    var view = db.view('lists/basicView');
    T(view.total_rows == 10);
    
    // standard get
    var xhr = CouchDB.request("GET", "/test_suite_db/_list/lists/simpleForm/basicView");
    T(xhr.status == 200);
    T(/Total Rows/.test(xhr.responseText));
    T(/Key: 1/.test(xhr.responseText));
    
    // get with query params
    var xhr = CouchDB.request("GET", "/test_suite_db/_list/lists/simpleForm/basicView?startkey=3");
    T(xhr.status == 200);
    T(/Total Rows/.test(xhr.responseText));
    T(!(/Key: 1/.test(xhr.responseText)));
    
    // with 0 rows
    var xhr = CouchDB.request("GET", "/test_suite_db/_list/lists/simpleForm/basicView?startkey=30");
    T(xhr.status == 200);
    T(/Total Rows/.test(xhr.responseText));
    T(/Offset: null/.test(xhr.responseText));
    
    // when there is a reduce present, but not used
    var xhr = CouchDB.request("GET", "/test_suite_db/_list/lists/simpleForm/withReduce?reduce=false");
    T(xhr.status == 200);
    T(/Total Rows/.test(xhr.responseText));
    T(/Key: 1/.test(xhr.responseText));
    
    // with accept headers for HTML
    xhr = CouchDB.request("GET", "/test_suite_db/_list/lists/acceptSwitch/basicView", {
      headers: {
        "Accept": 'text/html'
      }
    });
    T(xhr.getResponseHeader("Content-Type") == "text/html");
    T(xhr.responseText.match(/HTML/));
    T(xhr.responseText.match(/Value/));

    // now with xml
    xhr = CouchDB.request("GET", "/test_suite_db/_list/lists/acceptSwitch/basicView", {
      headers: {
        "Accept": 'application/xml'
      }
    });
    T(xhr.getResponseHeader("Content-Type") == "application/xml");
    T(xhr.responseText.match(/XML/));
    T(xhr.responseText.match(/entry/));
  },

  compact: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
    var docs = makeDocs(0, 10);
    var saveResult = db.bulkSave(docs);
    T(saveResult.ok);

    var binAttDoc = {
      _id: "bin_doc",
      _attachments:{
        "foo.txt": {
          content_type:"text/plain",
          data: "VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGVkIHRleHQ="
        }
      }
    }

    T(db.save(binAttDoc).ok);

    var originalsize = db.info().disk_size;

    for(var i in docs) {
        db.deleteDoc(docs[i]);
    }
    db.setAdmins(["Foo bar"]);
    var deletesize = db.info().disk_size;
    T(deletesize > originalsize);

    var xhr = CouchDB.request("POST", "/test_suite_db/_compact");
    T(xhr.status == 202);
    // compaction isn't instantaneous, loop until done
    while (db.info().compact_running) {};
    
    T(db.ensureFullCommit().ok);
    restartServer();
    var xhr = CouchDB.request("GET", "/test_suite_db/bin_doc/foo.txt");
    T(xhr.responseText == "This is a base64 encoded text")
    T(xhr.getResponseHeader("Content-Type") == "text/plain")
    T(db.info().doc_count == 1);
    T(db.info().disk_size < deletesize);
    
  },
  
  purge: function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
    
    /*
     purge is not to be confused with a document deletion.  It removes the
     document and all edit history from the local instance of the database.
    */

    var numDocs = 10;

    var designDoc = {
      _id:"_design/test",
      language: "javascript",
      views: {
        all_docs_twice: {map: "function(doc) { emit(doc.integer, null); emit(doc.integer, null) }"},
        single_doc: {map: "function(doc) { if (doc._id == \"1\") { emit(1, null) }}"}
      }
    }
    
    T(db.save(designDoc).ok);

    T(db.bulkSave(makeDocs(1, numDocs + 1)).ok);

    // go ahead and validate the views before purging
    var rows = db.view("test/all_docs_twice").rows;
    for (var i = 0; i < numDocs; i++) {
      T(rows[2*i].key == i+1);
      T(rows[(2*i)+1].key == i+1);
    }
    T(db.view("test/single_doc").total_rows == 1);
    
    var info = db.info();
    var doc1 = db.open("1");
    var doc2 = db.open("2");
    
    // purge the documents
    var xhr = CouchDB.request("POST", "/test_suite_db/_purge", {
      body: JSON.stringify({"1":[doc1._rev], "2":[doc2._rev]}),
    });
    T(xhr.status == 200);

    var newInfo = db.info();
    // purging increments the update sequence
    T(info.update_seq+1 == newInfo.update_seq);
    // and it increments the purge_seq
    T(info.purge_seq+1 == newInfo.purge_seq);

    var result = JSON.parse(xhr.responseText);
    T(result.purged["1"][0] == doc1._rev);
    T(result.purged["2"][0] == doc2._rev);
    
    T(db.open("1") == null);
    T(db.open("2") == null);
    
    var rows = db.view("test/all_docs_twice").rows;
    for (var i = 2; i < numDocs; i++) {
      T(rows[2*(i-2)].key == i+1);
      T(rows[(2*(i-2))+1].key == i+1);
    }
    T(db.view("test/single_doc").total_rows == 0);
    
    // purge documents twice in a row without loading views
    // (causes full view rebuilds)
    
    var doc3 = db.open("3");
    var doc4 = db.open("4");
    
    xhr = CouchDB.request("POST", "/test_suite_db/_purge", {
      body: JSON.stringify({"3":[doc3._rev]}),
    });
    
    T(xhr.status == 200);
    
    xhr = CouchDB.request("POST", "/test_suite_db/_purge", {
      body: JSON.stringify({"4":[doc4._rev]}),
    });
    
    T(xhr.status == 200);
    
    var rows = db.view("test/all_docs_twice").rows;
    for (var i = 4; i < numDocs; i++) {
      T(rows[2*(i-4)].key == i+1);
      T(rows[(2*(i-4))+1].key == i+1);
    }
    T(db.view("test/single_doc").total_rows == 0);
  },
  
  config : function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
    
    // test that /_config returns all the settings
    var xhr = CouchDB.request("GET", "/_config");
    var config = JSON.parse(xhr.responseText);

    /*
      if we run on standard ports, we can't extract
      the number from the URL. Instead we try to guess
      from the protocol what port we are running on.
      If we can't guess, we don't test for the port.
      Overengineering FTW.
    */
    var server_port = CouchDB.host.split(':');
    if(server_port.length == 1 && CouchDB.inBrowser) {
      var proto = window.location.protocol;
      if(proto == "http:") {
        port = 80;
      }
      if(proto == "https:") {
        port = 443;
      }
    } else {
      port = server_port.pop();
    }

    if(port) {
      T(config.httpd.port == port);
    }

    T(config.couchdb.database_dir);
    T(config.daemons.httpd);
    T(config.httpd_global_handlers._config);
    T(config.log.level);
    T(config.query_servers.javascript);
    
    // test that settings can be altered
    xhr = CouchDB.request("PUT", "/_config/test/foo",{
      body : JSON.stringify("bar")
    });
    T(xhr.status == 200);
    xhr = CouchDB.request("GET", "/_config/test");
    config = JSON.parse(xhr.responseText);
    T(config.foo == "bar");

    // you can get a single key
    xhr = CouchDB.request("GET", "/_config/test/foo");
    T(xhr.responseText == '"bar"');
  },

  security_validation : function(debug) {
    // This tests couchdb's security and validation features. This does
    // not test authentication, except to use test authentication code made
    // specifically for this testing. It is a WWWW-Authenticate scheme named
    // X-Couch-Test-Auth, and the user names and passwords are hard coded
    // on the server-side.
    // 
    // We could have used Basic authentication, however the XMLHttpRequest
    // implementation for Firefox and Safari, and probably other browsers are
    // broken (Firefox always prompts the user on 401 failures, Safari gives
    // odd security errors when using different name/passwords, perhaps due
    // to cross site scripting prevention).  These problems essentially make Basic
    // authentication testing in the browser impossible. But while hard to
    // test automated in the browser, Basic auth may still useful for real
    // world use where these bugs/behaviors don't matter.
    //
    // So for testing purposes we are using this custom X-Couch-Test-Auth.
    // It's identical to Basic auth, except it doesn't even base64 encode
    // the "username:password" string, it's sent completely plain text.
    // Firefox and Safari both deal with this correctly (which is to say
    // they correctly do nothing special).
    
    
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
    
    run_on_modified_server(
      [{section: "httpd",
        key: "authentication_handler",
        value: "{couch_httpd, special_test_authentication_handler}"},
      {section:"httpd",
        key: "WWW-Authenticate",
        value:  "X-Couch-Test-Auth"}],
        
      function () {
    
        // try saving document usin the wrong credentials
        var wrongPasswordDb = new CouchDB("test_suite_db",
          {"WWW-Authenticate": "X-Couch-Test-Auth Damien Katz:foo"}
        );
    
        try {
          wrongPasswordDb.save({foo:1,author:"Damien Katz"});
          T(false && "Can't get here. Should have thrown an error 1");
        } catch (e) {
          T(e.error == "unauthorized");
          T(wrongPasswordDb.last_req.status == 401);
        }
        
        
        // Create the design doc that will run custom validation code
        var designDoc = {
          _id:"_design/test",
          language: "javascript",
          validate_doc_update: "(" + (function (newDoc, oldDoc, userCtx) {
            // docs should have an author field.
            if (!newDoc._deleted && !newDoc.author) {
              throw {forbidden:
                  "Documents must have an author field"};
            }
            if (oldDoc && oldDoc.author != userCtx.name) {
                throw {unauthorized:
                    "You are not the author of this document. You jerk."};
            }
          }).toString() + ")"
        }

        // Save a document normally
        var userDb = new CouchDB("test_suite_db",
          {"WWW-Authenticate": "X-Couch-Test-Auth Damien Katz:pecan pie"}
        );
        
        T(userDb.save({_id:"testdoc", foo:1, author:"Damien Katz"}).ok);
        
        // Attempt to save the design as a non-admin
        try {
          userDb.save(designDoc);
          T(false && "Can't get here. Should have thrown an error on design doc");
        } catch (e) {
          T(e.error == "unauthorized");
          T(userDb.last_req.status == 401);
        }
        
        // add user as admin
        db.setAdmins(["Damien Katz"]);
        
        T(userDb.save(designDoc).ok);
    
        // update the document
        var doc = userDb.open("testdoc");
        doc.foo=2;
        T(userDb.save(doc).ok);
        
        // Save a document that's missing an author field.
        try {
          userDb.save({foo:1});
          T(false && "Can't get here. Should have thrown an error 2");
        } catch (e) {
          T(e.error == "forbidden");
          T(userDb.last_req.status == 403);
        }
    
        // Now attempt to update the document as a different user, Jan 
        var user2Db = new CouchDB("test_suite_db",
          {"WWW-Authenticate": "X-Couch-Test-Auth Jan Lehnardt:apple"}
        );
    
        var doc = user2Db.open("testdoc");
        doc.foo=3;
        try {
          user2Db.save(doc);
          T(false && "Can't get here. Should have thrown an error 3");
        } catch (e) {
          T(e.error == "unauthorized");
          T(user2Db.last_req.status == 401);
        }
        
        // Now have Damien change the author to Jan
        doc = userDb.open("testdoc");
        doc.author="Jan Lehnardt";
        T(userDb.save(doc).ok);
        
        // Now update the document as Jan
        doc = user2Db.open("testdoc");
        doc.foo = 3;
        T(user2Db.save(doc).ok);
        
        // Damien can't delete it
        try {
          userDb.deleteDoc(doc);
          T(false && "Can't get here. Should have thrown an error 4");
        } catch (e) {
          T(e.error == "unauthorized");
          T(userDb.last_req.status == 401);
        }
        
        // Now delete document
        T(user2Db.deleteDoc(doc).ok);
      });
  },
  
  
  max_dbs_open : function(debug) {
    if (debug) debugger;
    restartServer();
    var max = 5;
    run_on_modified_server(
      [{section: "couchdb",
        key: "max_dbs_open",
        value: max.toString()}],
        
      function () {
        for(var i=0; i<max*2; i++) {
          var db = new CouchDB("test_suite_db"+ i);
          db.deleteDb();
          db.createDb();
        }
        
        var stats = JSON.parse(CouchDB.request("GET", "/_stats").responseText);
        T(stats.dbs_open == max);
        
        
        for(var i=0; i<max*2; i++) {
          var db = new CouchDB("test_suite_db"+ i);
          db.deleteDb();
        }
        
        var stats = JSON.parse(CouchDB.request("GET", "/_stats").responseText);
        T(stats.dbs_open == 0);
      })
  },
};

function makeDocs(start, end, templateDoc) {
  var templateDocSrc = templateDoc ? JSON.stringify(templateDoc) : "{}"
  if (end === undefined) {
    end = start;
    start = 0;
  }
  var docs = []
  for (var i = start; i < end; i++) {
    var newDoc = eval("(" + templateDocSrc + ")");
    newDoc._id = (i).toString();
    newDoc.integer = i;
    newDoc.string = (i).toString();
    docs.push(newDoc)
  }
  return docs;
}

function run_on_modified_server(settings, fun) {
  try {
    // set the settings
    for(var i=0; i < settings.length; i++) {
      var s = settings[i];
      var xhr = CouchDB.request("PUT", "/_config/" + s.section + "/" + s.key, {
        body: JSON.stringify(s.value),
        headers: {"X-Couch-Persist": "false"}
      });
      CouchDB.maybeThrowError(xhr);
      s.oldValue = xhr.responseText;
    }
    // run the thing
    fun();
  } finally {
    // unset the settings
    for(var j=0; j < i; j++) {
      var s = settings[j];
      CouchDB.request("PUT", "/_config/" + s.section + "/" + s.key, {
        body: s.oldValue,
        headers: {"X-Couch-Persist": "false"}
      });
    }
  }
}

function restartServer() {
  CouchDB.request("POST", "/_restart");
}