1 files changed, 52 insertions, 48 deletions
diff --git a/jstests/core/existsa.js b/jstests/core/existsa.js
index 0d2472ca328..466a5e94a63 100644
--- a/jstests/core/existsa.js
+++ b/jstests/core/existsa.js
@@ -3,99 +3,103 @@
 t = db.jstests_existsa;
 t.drop();
 
-t.save( {} );
-t.save( { a:1 } );
-t.save( { a:{ x:1 }, b:1 } );
+t.save({});
+t.save({a: 1});
+t.save({a: {x: 1}, b: 1});
 
 /** Configure testing of an index { <indexKeyField>:1 }. */
-function setIndex( _indexKeyField ) {
+function setIndex(_indexKeyField) {
     indexKeyField = _indexKeyField;
     indexKeySpec = {};
-    indexKeySpec[ indexKeyField ] = 1;
-    t.ensureIndex( indexKeySpec, { sparse:true } );
+    indexKeySpec[indexKeyField] = 1;
+    t.ensureIndex(indexKeySpec, {sparse: true});
 }
-setIndex( 'a' );
+setIndex('a');
 
 /** @return count when hinting the index to use. */
-function hintedCount( query ) {
-    return t.find( query ).hint( indexKeySpec ).itcount();
+function hintedCount(query) {
+    return t.find(query).hint(indexKeySpec).itcount();
 }
 
 /** The query field does not exist and the sparse index is not used without a hint. */
-function assertMissing( query, expectedMissing, expectedIndexedMissing ) {
+function assertMissing(query, expectedMissing, expectedIndexedMissing) {
     expectedMissing = expectedMissing || 1;
     expectedIndexedMissing = expectedIndexedMissing || 0;
-    assert.eq( expectedMissing, t.count( query ) );
+    assert.eq(expectedMissing, t.count(query));
     // We also shouldn't get a different count depending on whether
     // an index is used or not.
-    assert.eq( expectedIndexedMissing, hintedCount( query ) );
+    assert.eq(expectedIndexedMissing, hintedCount(query));
 }
 
 /** The query field exists and the sparse index is used without a hint. */
-function assertExists( query, expectedExists ) {
+function assertExists(query, expectedExists) {
     expectedExists = expectedExists || 2;
-    assert.eq( expectedExists, t.count( query ) );
+    assert.eq(expectedExists, t.count(query));
     // An $exists:true predicate generates no index filters.  Add another predicate on the index key
     // to trigger use of the index.
     andClause = {};
-    andClause[ indexKeyField ] = { $ne:null };
-    Object.extend( query, { $and:[ andClause ] } );
-    assert.eq( expectedExists, t.count( query ) );
-    assert.eq( expectedExists, hintedCount( query ) );
+    andClause[indexKeyField] = {
+        $ne: null
+    };
+    Object.extend(query, {$and: [andClause]});
+    assert.eq(expectedExists, t.count(query));
+    assert.eq(expectedExists, hintedCount(query));
 }
 
 /** The query field exists and the sparse index is not used without a hint. */
-function assertExistsUnindexed( query, expectedExists ) {
+function assertExistsUnindexed(query, expectedExists) {
     expectedExists = expectedExists || 2;
-    assert.eq( expectedExists, t.count( query ) );
+    assert.eq(expectedExists, t.count(query));
     // Even with another predicate on the index key, the sparse index is disallowed.
     andClause = {};
-    andClause[ indexKeyField ] = { $ne:null };
-    Object.extend( query, { $and:[ andClause ] } );
-    assert.eq( expectedExists, t.count( query ) );
-    assert.eq( expectedExists, hintedCount( query ) );
+    andClause[indexKeyField] = {
+        $ne: null
+    };
+    Object.extend(query, {$and: [andClause]});
+    assert.eq(expectedExists, t.count(query));
+    assert.eq(expectedExists, hintedCount(query));
 }
 
 // $exists:false queries match the proper number of documents and disallow the sparse index.
-assertMissing( { a:{ $exists:false } } );
-assertMissing( { a:{ $not:{ $exists:true } } } );
-assertMissing( { $and:[ { a:{ $exists:false } } ] } );
-assertMissing( { $or:[ { a:{ $exists:false } } ] } );
-assertMissing( { $nor:[ { a:{ $exists:true } } ] } );
-assertMissing( { 'a.x':{ $exists:false } }, 2, 1 );
+assertMissing({a: {$exists: false}});
+assertMissing({a: {$not: {$exists: true}}});
+assertMissing({$and: [{a: {$exists: false}}]});
+assertMissing({$or: [{a: {$exists: false}}]});
+assertMissing({$nor: [{a: {$exists: true}}]});
+assertMissing({'a.x': {$exists: false}}, 2, 1);
 
 // Currently a sparse index is disallowed even if the $exists:false query is on a different field.
-assertMissing( { b:{ $exists:false } }, 2, 1 );
-assertMissing( { b:{ $exists:false }, a:{ $ne:6 } }, 2, 1 );
-assertMissing( { b:{ $not:{ $exists:true } } }, 2, 1 );
+assertMissing({b: {$exists: false}}, 2, 1);
+assertMissing({b: {$exists: false}, a: {$ne: 6}}, 2, 1);
+assertMissing({b: {$not: {$exists: true}}}, 2, 1);
 
 // Top level $exists:true queries match the proper number of documents
 // and use the sparse index on { a : 1 }.
-assertExists( { a:{ $exists:true } } );
+assertExists({a: {$exists: true}});
 
 // Nested $exists queries match the proper number of documents and disallow the sparse index.
-assertExistsUnindexed( { $nor:[ { a:{ $exists:false } } ] } );
-assertExistsUnindexed( { $nor:[ { 'a.x':{ $exists:false } } ] }, 1 );
-assertExistsUnindexed( { a:{ $not:{ $exists:false } } } );
+assertExistsUnindexed({$nor: [{a: {$exists: false}}]});
+assertExistsUnindexed({$nor: [{'a.x': {$exists: false}}]}, 1);
+assertExistsUnindexed({a: {$not: {$exists: false}}});
 
 // Nested $exists queries disallow the sparse index in some cases where it is not strictly
 // necessary to do so.  (Descriptive tests.)
-assertExistsUnindexed( { $nor:[ { b:{ $exists:false } } ] }, 1 );  // Unindexed field.
-assertExists( { $or:[ { a:{ $exists:true } } ] } );  // $exists:true not $exists:false.
+assertExistsUnindexed({$nor: [{b: {$exists: false}}]}, 1);  // Unindexed field.
+assertExists({$or: [{a: {$exists: true}}]});  // $exists:true not $exists:false.
 
 // Behavior is similar with $elemMatch.
 t.drop();
-t.save( { a:[ {} ] } );
-t.save( { a:[ { b:1 } ] } );
-t.save( { a:[ { b:1 } ] } );
-setIndex( 'a.b' );
+t.save({a: [{}]});
+t.save({a: [{b: 1}]});
+t.save({a: [{b: 1}]});
+setIndex('a.b');
 
-assertMissing( { a:{ $elemMatch:{ b:{ $exists:false } } } } );
+assertMissing({a: {$elemMatch: {b: {$exists: false}}}});
 // A $elemMatch predicate is treated as nested, and the index should be used for $exists:true.
-assertExists( { a:{ $elemMatch:{ b:{ $exists:true } } } } );
+assertExists({a: {$elemMatch: {b: {$exists: true}}}});
 
 // A non sparse index will not be disallowed.
 t.drop();
-t.save( {} );
-t.ensureIndex( { a:1 } );
-assert.eq( 1, t.find( { a:{ $exists:false } } ).itcount() );
+t.save({});
+t.ensureIndex({a: 1});
+assert.eq(1, t.find({a: {$exists: false}}).itcount());