SERVER-606 add background indexing unit test

jstests/index11.js

@@ -0,0 +1,89 @@
+// Test background index creation
+
+parallel = function() {
+    return db[ baseName + "_parallelStatus" ];
+}
+
+resetParallel = function() {
+    parallel().drop();
+}
+
+doParallel = function( work ) {
+    resetParallel();
+    startMongoProgramNoConnect( "mongo", "--eval", work + "; db." + baseName + "_parallelStatus.save( {done:1} );" );
+}
+
+doneParallel = function() {
+    return !!parallel().findOne();
+}
+
+waitParallel = function() {
+    assert.soon( function() { return doneParallel(); }, "parallel did not finish in time", 300000, 1000 );
+}
+
+size = 500000;
+while( 1 ) { // if indexing finishes before we can run checks, try indexing w/ more data
+    print( "size: " + size );
+    baseName = "jstests_index11";
+    fullName = "db." + baseName;
+    t = db[ baseName ];
+    t.drop();
+
+    db.eval( function( size ) {
+                for( i = 0; i < size; ++i ) {
+                    db.jstests_index11.save( {i:i} );
+                }
+            },
+            size );
+    assert.eq( size, t.count() );
+    
+    doParallel( fullName + ".ensureIndex( {i:1}, {background:true} )" );
+    try {
+        // wait for indexing to start
+        assert.soon( function() { return 2 == db.system.indexes.count( {ns:"test."+baseName} ) }, 30000, 50 );
+        assert.eq( size, t.count() );
+        assert.eq( 100, t.findOne( {i:100} ).i );
+        q = t.find();
+        for( i = 0; i < 120; ++i ) { // getmore
+            q.next();
+            assert( q.hasNext(), "no next" );
+        }
+        assert.eq( "BasicCursor", t.find( {i:100} ).explain().cursor, "used btree cursor" );
+        t.remove( {i:40} );
+        t.update( {i:10}, {i:-10} );
+        id = t.find().hint( {$natural:-1} )._id;
+        t.update( {_id:id}, {i:-2} );
+        t.save( {i:-50} );
+        t.save( {i:size+2} );
+        assert( !db.getLastError() );
+        t.ensureIndex( {i:1} );
+        printjson( db.getLastError() );
+        assert( db.getLastError() );
+        assert.eq( size + 1, t.count() );
+        assert( !db.getLastError() );
+        t.dropIndex( {i:1} );
+        printjson( db.getLastError() );
+        assert( db.getLastError() );        
+    } catch( e ) {
+        // only a failure if we're still indexing
+        // wait for parallel status to update to reflect indexing status
+        sleep( 1000 );
+        if ( !doneParallel() ) {
+            throw e;
+        }
+    }
+    if ( !doneParallel() ) {
+        break;
+    }
+    print( "indexing finished too soon, retrying..." );
+    size *= 2;
+    assert( size < 5000000, "unable to run checks in parallel with index creation" );
+}
+
+waitParallel();
+assert.eq( "BtreeCursor i_1", t.find( {i:100} ).explain().cursor );
+assert.eq( 1, t.count( {i:-10} ) );
+assert.eq( 1, t.count( {i:-2} ) );
+assert.eq( 1, t.count( {i:-50} ) );
+assert.eq( 1, t.count( {i:size+2} ) );
+assert.eq( 0, t.count( {i:40} ) );

mongo.xcodeproj/project.pbxproj

@@ -33,6 +33,7 @@
 		931186FB0F8535FF00A6DC44 /* bridge.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = bridge.cpp; sourceTree = "<group>"; };
 		931979810FBC67FB001FE537 /* utils.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = utils.cpp; sourceTree = "<group>"; };
 		931A027A0F58AA4400147C0E /* jsobjmanipulator.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = jsobjmanipulator.h; sourceTree = "<group>"; };
+		9323308F1121E5B100712706 /* index11.js */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.javascript; path = index11.js; sourceTree = "<group>"; };
 		93278F570F72D32900844664 /* gridfs.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = gridfs.cpp; sourceTree = "<group>"; };
 		93278F580F72D32900844664 /* gridfs.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = gridfs.h; sourceTree = "<group>"; };
 		93278F610F72D39400844664 /* cursors.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = cursors.cpp; sourceTree = "<group>"; };
@@ -735,6 +736,7 @@
 		934BEB9A10DFFA9600178102 /* jstests */ = {
 			isa = PBXGroup;
 			children = (
+				9323308F1121E5B100712706 /* index11.js */,
 				93D5A8921117A1380052C931 /* regex6.js */,
 				938E639A110FC66900A8760A /* auth */,
 				93BCE41810F3AF1B00FA139B /* capped2.js */,