Fixes COUCHDB-1265

Backport of 1164350 from trunk. Slightly modified for an export 
declaration conflict and removing a clause that only applies to
trunk.



git-svn-id: https://svn.apache.org/repos/asf/couchdb/branches/1.1.x@1164351 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 41 insertions, 0 deletions

diff --git a/share/www/script/test/recreate_doc.js b/share/www/script/test/recreate_doc.js
index 05843558..a1cfb8f8 100644
--- a/share/www/script/test/recreate_doc.js
+++ b/share/www/script/test/recreate_doc.js
@@ -77,4 +77,45 @@ couchTests.recreate_doc = function(debug) {
   } catch (e) {
     T(e.error == "conflict");
   }
+
+  db.deleteDb();
+  db.createDb();
+
+  // COUCHDB-1265
+  // Resuscitate an unavailable old revision and make sure that it
+  // doesn't introduce duplicates into the _changes feed.
+  
+  var doc = {_id: "bar", count: 0};
+  T(db.save(doc).ok);
+  var ghost = {_id: "bar", _rev: doc._rev, count: doc.count};
+  for(var i = 0; i < 2; i++) {
+    doc.count += 1;
+    T(db.save(doc).ok);
+  }
+
+  // Compact so that the old revision to be resuscitated will be
+  // in the rev_tree as ?REV_MISSING
+  db.compact();
+  while(db.info().compact_running) {}
+
+  // Saving the ghost here puts it back in the rev_tree in such
+  // a way as to create a new update_seq but without changing a
+  // leaf revision. This would cause the #full_doc_info{} and
+  // #doc_info{} records to diverge in their idea of what the
+  // doc's update_seq is and end up introducing a duplicate in
+  // the _changes feed the next time this doc is updated.
+  T(db.save(ghost, {new_edits: false}).ok);
+
+  // The duplicate would have been introduce here becuase the #doc_info{}
+  // would not have been removed correctly.
+  T(db.save(doc).ok);
+
+  // And finally assert that there are no duplicates in _changes.
+  var req = CouchDB.request("GET", "/test_suite_db/_changes");
+  var resp = JSON.parse(req.responseText);
+  var docids = {};
+  for(var i = 0; i < resp.results.length; i++) {
+    T(docids[resp.results[i].id] === undefined, "Duplicates in _changes feed.");
+    docids[resp.results[i].id] = true;
+  }
 };