Add allowClientClassCreation option

spec/RestQuery.spec.js

@@ -95,6 +95,20 @@ describe('rest query', () => {
     }).catch((error) => { console.log(error); });
   });
 
+  it('query non-existent class when disabled client class creation', (done) => {
+    var customConfig = Object.assign({}, config, {allowClientClassCreation: false});
+    rest.find(customConfig, auth.nobody(customConfig), 'ClientClassCreation', {})
+      .then(() => {
+        fail('Should throw an error');
+        done();
+      }, (err) => {
+        expect(err.code).toEqual(Parse.Error.OPERATION_FORBIDDEN);
+        expect(err.message).toEqual('This user is not allowed to access ' +
+                                    'non-existent class: ClientClassCreation');
+        done();
+    });
+  });
+
   it('query with wrongly encoded parameter', (done) => {
     rest.create(config, nobody, 'TestParameterEncode', {foo: 'bar'}
     ).then(() => {