Added tests for synchronous methods in native modules on iOS

Reviewed By: javache

Differential Revision: D4947631

fbshipit-source-id: d7e497c44602eb6e38896a00edb61639ab2b8cd4

IntegrationTests/IntegrationTestsApp.js

@@ -33,6 +33,7 @@ var TESTS = [
   require('./ImageCachePolicyTest'),
   require('./ImageSnapshotTest'),
   require('./PromiseTest'),
+  require('./SyncMethodTest'),
   require('./WebSocketTest'),
 ];
 

IntegrationTests/SyncMethodTest.js

@@ -0,0 +1,42 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @flow
+ * @providesModule SyncMethodTest
+ */
+'use strict';
+
+var React = require('react');
+var ReactNative = require('react-native');
+var { View } = ReactNative;
+
+const {
+  TestModule,
+  UIExplorerTestModule,
+} = ReactNative.NativeModules;
+
+
+class SyncMethodTest extends React.Component {
+  componentDidMount() {
+    if (UIExplorerTestModule.echoString('test string value') !== 'test string value') {
+      throw new Error('Something wrong with sync method export');
+    }
+    if (UIExplorerTestModule.methodThatReturnsNil() != null) {
+      throw new Error('Something wrong with sync method export');
+    }
+    TestModule.markTestCompleted();
+  }
+
+  render(): React.Element<any> {
+    return <View />;
+  }
+}
+
+SyncMethodTest.displayName = 'SyncMethodTest';
+
+module.exports = SyncMethodTest;