Do not suppress old revisions from _changes

Requests to '_changes?style=all_docs' with a 'since' parameter would
suppress revisions of a document generated before the start of the
feed.  The assumption may have been that those revisions were seen by
the client in a previous request to _changes, but this is not
necessarily true if the client is resuming the feed after a partial
download.

The safe thing to do is to include all leaf revisions for each document
in the feed.

Thanks Bob Dionne for the test code.

Closes COUCHDB-1256

git-svn-id: https://svn.apache.org/repos/asf/couchdb/branches/1.1.x@1161702 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 26 insertions, 0 deletions

diff --git a/share/www/script/test/changes.js b/share/www/script/test/changes.js
index ea22bfb3..284f1985 100644
--- a/share/www/script/test/changes.js
+++ b/share/www/script/test/changes.js
@@ -507,6 +507,32 @@ couchTests.changes = function(debug) {
   CouchDB.request("GET", "/" + db.name + "/_changes");
   TEquals(0, CouchDB.requestStats('httpd', 'clients_requesting_changes').current);
 
+  // COUCHDB-1256
+  T(db.deleteDb());
+  T(db.createDb());
+
+  T(db.save({"_id":"foo", "a" : 123}).ok);
+  T(db.save({"_id":"bar", "a" : 456}).ok);
+
+  options = {
+      headers: {"Content-Type": "application/json"},
+      body: JSON.stringify({"_rev":"1-cc609831f0ca66e8cd3d4c1e0d98108a", "a":456})
+  };
+  req = CouchDB.request("PUT", "/" + db.name + "/foo?new_edits=false", options);
+
+  req = CouchDB.request("GET", "/" + db.name + "/_changes?style=all_docs");
+  resp = JSON.parse(req.responseText);
+
+  TEquals(3, resp.last_seq);
+  TEquals(2, resp.results.length);
+
+  req = CouchDB.request("GET", "/" + db.name + "/_changes?style=all_docs&since=2");
+  resp = JSON.parse(req.responseText);
+
+  TEquals(3, resp.last_seq);
+  TEquals(1, resp.results.length);
+  TEquals(2, resp.results[0].changes.length);
+
   // cleanup
   db.deleteDb();
 };