datastore: fix: kindless queries with namespace (#2263)

Author: stephenplusplus

handwritten/datastore/src/index.js

@@ -440,8 +440,8 @@ Datastore.NO_MORE_RESULTS = 'NO_MORE_RESULTS';
  * var query = datastore.createQuery('Company');
  */
 Datastore.prototype.createQuery = function(namespace, kind) {
-  if (arguments.length === 1) {
-    kind = arrify(namespace);
+  if (arguments.length < 2) {
+    kind = namespace;
     namespace = this.namespace;
   }
 

handwritten/datastore/test/index.js

@@ -284,6 +284,14 @@ describe('Datastore', function() {
       assert.strictEqual(query.calledWith_[1], datastore.namespace);
       assert.deepEqual(query.calledWith_[2], kind);
     });
+
+    it('should include the default namespace in a kindless query', function() {
+      var query = datastore.createQuery();
+
+      assert.strictEqual(query.calledWith_[0], datastore);
+      assert.strictEqual(query.calledWith_[1], datastore.namespace);
+      assert.deepEqual(query.calledWith_[2], []);
+    });
   });
 
   describe('key', function() {