diff --git a/IntegrationTests/AccessibilityManagerTest.js b/IntegrationTests/AccessibilityManagerTest.js
index 4287094d3..41710be91 100644
--- a/IntegrationTests/AccessibilityManagerTest.js
+++ b/IntegrationTests/AccessibilityManagerTest.js
@@ -4,35 +4,33 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 const React = require('react');
 const ReactNative = require('react-native');
-const { View } = ReactNative;
+const {View} = ReactNative;
 const RCTDeviceEventEmitter = require('RCTDeviceEventEmitter');
-const {
-  TestModule,
-  AccessibilityManager,
-} = ReactNative.NativeModules;
-
+const {TestModule, AccessibilityManager} = ReactNative.NativeModules;
 
 class AccessibilityManagerTest extends React.Component<{}> {
   componentDidMount() {
     AccessibilityManager.setAccessibilityContentSizeMultipliers({
-      'extraSmall': 1.0,
-      'small': 2.0,
-      'medium': 3.0,
-      'large': 4.0,
-      'extraLarge': 5.0,
-      'extraExtraLarge': 6.0,
-      'extraExtraExtraLarge': 7.0,
-      'accessibilityMedium': 8.0,
-      'accessibilityLarge': 9.0,
-      'accessibilityExtraLarge': 10.0,
-      'accessibilityExtraExtraLarge': 11.0,
-      'accessibilityExtraExtraExtraLarge': 12.0,
+      extraSmall: 1.0,
+      small: 2.0,
+      medium: 3.0,
+      large: 4.0,
+      extraLarge: 5.0,
+      extraExtraLarge: 6.0,
+      extraExtraExtraLarge: 7.0,
+      accessibilityMedium: 8.0,
+      accessibilityLarge: 9.0,
+      accessibilityExtraLarge: 10.0,
+      accessibilityExtraExtraLarge: 11.0,
+      accessibilityExtraExtraExtraLarge: 12.0,
     });
     RCTDeviceEventEmitter.addListener('didUpdateDimensions', update => {
       TestModule.markTestPassed(update.window.fontScale === 4.0);
diff --git a/IntegrationTests/AppEventsTest.js b/IntegrationTests/AppEventsTest.js
index af04819b3..9df430fea 100644
--- a/IntegrationTests/AppEventsTest.js
+++ b/IntegrationTests/AppEventsTest.js
@@ -4,25 +4,22 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
 var ReactNative = require('react-native');
-var {
-  NativeAppEventEmitter,
-  StyleSheet,
-  Text,
-  View,
-} = ReactNative;
-var { TestModule } = ReactNative.NativeModules;
+var {NativeAppEventEmitter, StyleSheet, Text, View} = ReactNative;
+var {TestModule} = ReactNative.NativeModules;
 
 var deepDiffer = require('deepDiffer');
 
 var TEST_PAYLOAD = {foo: 'bar'};
 
-type AppEvent = { data: Object, ts: number, };
+type AppEvent = {data: Object, ts: number};
 type State = {
   sent: 'none' | AppEvent,
   received: 'none' | AppEvent,
@@ -43,7 +40,7 @@ class AppEventsTest extends React.Component<{}, State> {
     if (deepDiffer(event.data, TEST_PAYLOAD)) {
       throw new Error('Received wrong event: ' + JSON.stringify(event));
     }
-    var elapsed = (Date.now() - event.ts) + 'ms';
+    var elapsed = Date.now() - event.ts + 'ms';
     this.setState({received: event, elapsed}, () => {
       TestModule.markTestCompleted();
     });
@@ -52,9 +49,7 @@ class AppEventsTest extends React.Component<{}, State> {
   render() {
     return (
       <View style={styles.container}>
-        <Text>
-          {JSON.stringify(this.state, null, '  ')}
-        </Text>
+        <Text>{JSON.stringify(this.state, null, '  ')}</Text>
       </View>
     );
   }
diff --git a/IntegrationTests/AsyncStorageTest.js b/IntegrationTests/AsyncStorageTest.js
index 2d951dab3..9245854e2 100644
--- a/IntegrationTests/AsyncStorageTest.js
+++ b/IntegrationTests/AsyncStorageTest.js
@@ -4,18 +4,16 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
 var ReactNative = require('react-native');
-var {
-  AsyncStorage,
-  Text,
-  View,
-} = ReactNative;
-var { TestModule } = ReactNative.NativeModules;
+var {AsyncStorage, Text, View} = ReactNative;
+var {TestModule} = ReactNative.NativeModules;
 
 var deepDiffer = require('deepDiffer');
 
@@ -26,31 +24,34 @@ var VAL_1 = 'val_1';
 var KEY_2 = 'key_2';
 var VAL_2 = 'val_2';
 var KEY_MERGE = 'key_merge';
-var VAL_MERGE_1 = {'foo': 1, 'bar': {'hoo': 1, 'boo': 1}, 'moo': {'a': 3}};
-var VAL_MERGE_2 = {'bar': {'hoo': 2}, 'baz': 2, 'moo': {'a': 3}};
-var VAL_MERGE_EXPECT =
-  {'foo': 1, 'bar': {'hoo': 2, 'boo': 1}, 'baz': 2, 'moo': {'a': 3}};
+var VAL_MERGE_1 = {foo: 1, bar: {hoo: 1, boo: 1}, moo: {a: 3}};
+var VAL_MERGE_2 = {bar: {hoo: 2}, baz: 2, moo: {a: 3}};
+var VAL_MERGE_EXPECT = {foo: 1, bar: {hoo: 2, boo: 1}, baz: 2, moo: {a: 3}};
 
 // setup in componentDidMount
-var done = (result : ?boolean) => {};
-var updateMessage = (message : string ) => {};
+var done = (result: ?boolean) => {};
+var updateMessage = (message: string) => {};
 
-function runTestCase(description : string, fn) {
+function runTestCase(description: string, fn) {
   updateMessage(description);
   fn();
 }
 
-function expectTrue(condition : boolean, message : string) {
+function expectTrue(condition: boolean, message: string) {
   if (!condition) {
     throw new Error(message);
   }
 }
 
-function expectEqual(lhs, rhs, testname : string) {
+function expectEqual(lhs, rhs, testname: string) {
   expectTrue(
     !deepDiffer(lhs, rhs),
-    'Error in test ' + testname + ': expected\n' + JSON.stringify(rhs) +
-      '\ngot\n' + JSON.stringify(lhs)
+    'Error in test ' +
+      testname +
+      ': expected\n' +
+      JSON.stringify(rhs) +
+      '\ngot\n' +
+      JSON.stringify(lhs),
   );
 }
 
@@ -58,11 +59,14 @@ function expectAsyncNoError(place, err) {
   if (err instanceof Error) {
     err = err.message;
   }
-  expectTrue(err === null, 'Unexpected error in ' + place + ': ' + JSON.stringify(err));
+  expectTrue(
+    err === null,
+    'Unexpected error in ' + place + ': ' + JSON.stringify(err),
+  );
 }
 
 function testSetAndGet() {
-  AsyncStorage.setItem(KEY_1, VAL_1, (err1) => {
+  AsyncStorage.setItem(KEY_1, VAL_1, err1 => {
     expectAsyncNoError('testSetAndGet/setItem', err1);
     AsyncStorage.getItem(KEY_1, (err2, result) => {
       expectAsyncNoError('testSetAndGet/getItem', err2);
@@ -83,8 +87,8 @@ function testMissingGet() {
 }
 
 function testSetTwice() {
-  AsyncStorage.setItem(KEY_1, VAL_1, ()=>{
-    AsyncStorage.setItem(KEY_1, VAL_1, ()=>{
+  AsyncStorage.setItem(KEY_1, VAL_1, () => {
+    AsyncStorage.setItem(KEY_1, VAL_1, () => {
       AsyncStorage.getItem(KEY_1, (err, result) => {
         expectAsyncNoError('testSetTwice/setItem', err);
         expectEqual(result, VAL_1, 'testSetTwice');
@@ -96,16 +100,16 @@ function testSetTwice() {
 }
 
 function testRemoveItem() {
-  AsyncStorage.setItem(KEY_1, VAL_1, ()=>{
-    AsyncStorage.setItem(KEY_2, VAL_2, ()=>{
+  AsyncStorage.setItem(KEY_1, VAL_1, () => {
+    AsyncStorage.setItem(KEY_2, VAL_2, () => {
       AsyncStorage.getAllKeys((err, result) => {
         expectAsyncNoError('testRemoveItem/getAllKeys', err);
         expectTrue(
           result.indexOf(KEY_1) >= 0 && result.indexOf(KEY_2) >= 0,
-          'Missing KEY_1 or KEY_2 in ' + '(' + result + ')'
+          'Missing KEY_1 or KEY_2 in ' + '(' + result + ')',
         );
         updateMessage('testRemoveItem - add two items');
-        AsyncStorage.removeItem(KEY_1, (err2) => {
+        AsyncStorage.removeItem(KEY_1, err2 => {
           expectAsyncNoError('testRemoveItem/removeItem', err2);
           updateMessage('delete successful ');
           AsyncStorage.getItem(KEY_1, (err3, result2) => {
@@ -113,17 +117,17 @@ function testRemoveItem() {
             expectEqual(
               result2,
               null,
-              'testRemoveItem: key_1 present after delete'
+              'testRemoveItem: key_1 present after delete',
             );
             updateMessage('key properly removed ');
             AsyncStorage.getAllKeys((err4, result3) => {
-             expectAsyncNoError('testRemoveItem/getAllKeys', err4);
-             expectTrue(
-               result3.indexOf(KEY_1) === -1,
-               'Unexpected: KEY_1 present in ' + result3
-             );
-             updateMessage('proper length returned.');
-             runTestCase('should merge values', testMerge);
+              expectAsyncNoError('testRemoveItem/getAllKeys', err4);
+              expectTrue(
+                result3.indexOf(KEY_1) === -1,
+                'Unexpected: KEY_1 present in ' + result3,
+              );
+              updateMessage('proper length returned.');
+              runTestCase('should merge values', testMerge);
             });
           });
         });
@@ -133,9 +137,9 @@ function testRemoveItem() {
 }
 
 function testMerge() {
-  AsyncStorage.setItem(KEY_MERGE, JSON.stringify(VAL_MERGE_1), (err1) => {
+  AsyncStorage.setItem(KEY_MERGE, JSON.stringify(VAL_MERGE_1), err1 => {
     expectAsyncNoError('testMerge/setItem', err1);
-    AsyncStorage.mergeItem(KEY_MERGE, JSON.stringify(VAL_MERGE_2), (err2) => {
+    AsyncStorage.mergeItem(KEY_MERGE, JSON.stringify(VAL_MERGE_2), err2 => {
       expectAsyncNoError('testMerge/mergeItem', err2);
       AsyncStorage.getItem(KEY_MERGE, (err3, result) => {
         expectAsyncNoError('testMerge/setItem', err3);
@@ -150,21 +154,23 @@ function testMerge() {
 function testOptimizedMultiGet() {
   let batch = [[KEY_1, VAL_1], [KEY_2, VAL_2]];
   let keys = batch.map(([key, value]) => key);
-  AsyncStorage.multiSet(batch, (err1) => {
+  AsyncStorage.multiSet(batch, err1 => {
     // yes, twice on purpose
-    [1, 2].forEach((i) => {
+    [1, 2].forEach(i => {
       expectAsyncNoError(`${i} testOptimizedMultiGet/multiSet`, err1);
       AsyncStorage.multiGet(keys, (err2, result) => {
         expectAsyncNoError(`${i} testOptimizedMultiGet/multiGet`, err2);
         expectEqual(result, batch, `${i} testOptimizedMultiGet multiGet`);
-        updateMessage('multiGet([key_1, key_2]) correctly returned ' + JSON.stringify(result));
+        updateMessage(
+          'multiGet([key_1, key_2]) correctly returned ' +
+            JSON.stringify(result),
+        );
         done();
       });
     });
   });
 }
 
-
 class AsyncStorageTest extends React.Component<{}, $FlowFixMeState> {
   state = {
     messages: 'Initializing...',
@@ -172,10 +178,11 @@ class AsyncStorageTest extends React.Component<{}, $FlowFixMeState> {
   };
 
   componentDidMount() {
-    done = () => this.setState({done: true}, () => {
-      TestModule.markTestCompleted();
-    });
-    updateMessage = (msg) => {
+    done = () =>
+      this.setState({done: true}, () => {
+        TestModule.markTestCompleted();
+      });
+    updateMessage = msg => {
       this.setState({messages: this.state.messages.concat('\n' + msg)});
       DEBUG && console.log(msg);
     };
@@ -186,11 +193,10 @@ class AsyncStorageTest extends React.Component<{}, $FlowFixMeState> {
     return (
       <View style={{backgroundColor: 'white', padding: 40}}>
         <Text>
-          {
-            /* $FlowFixMe(>=0.54.0 site=react_native_fb,react_native_oss) This
+          {/* $FlowFixMe(>=0.54.0 site=react_native_fb,react_native_oss) This
              * comment suppresses an error found when Flow v0.54 was deployed.
              * To see the error delete this comment and run Flow. */
-            this.constructor.displayName + ': '}
+          this.constructor.displayName + ': '}
           {this.state.done ? 'Done' : 'Testing...'}
           {'\n\n' + this.state.messages}
         </Text>
diff --git a/IntegrationTests/ImageCachePolicyTest.js b/IntegrationTests/ImageCachePolicyTest.js
index a095b4ec9..1c4429389 100644
--- a/IntegrationTests/ImageCachePolicyTest.js
+++ b/IntegrationTests/ImageCachePolicyTest.js
@@ -4,19 +4,16 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
 var ReactNative = require('react-native');
-var {
-  Image,
-  View,
-  Text,
-  StyleSheet,
-} = ReactNative;
-var { TestModule } = ReactNative.NativeModules;
+var {Image, View, Text, StyleSheet} = ReactNative;
+var {TestModule} = ReactNative.NativeModules;
 
 /*
  * The reload and force-cache tests don't actually verify that the complete functionality.
@@ -30,22 +27,25 @@ var { TestModule } = ReactNative.NativeModules;
 
 const TESTS = ['only-if-cached', 'default', 'reload', 'force-cache'];
 
-type Props = {}
+type Props = {};
 type State = {
   'only-if-cached'?: boolean,
-  'default'?: boolean,
-  'reload'?: boolean,
+  default?: boolean,
+  reload?: boolean,
   'force-cache'?: boolean,
-}
+};
 
 class ImageCachePolicyTest extends React.Component<Props, $FlowFixMeState> {
-  state = {}
+  state = {};
 
   shouldComponentUpdate(nextProps: Props, nextState: State) {
     const results: Array<?boolean> = TESTS.map(x => nextState[x]);
 
     if (!results.includes(undefined)) {
-      const result: boolean = results.reduce((x,y) => x === y === true, true);
+      const result: boolean = results.reduce(
+        (x, y) => (x === y) === true,
+        true,
+      );
       TestModule.markTestPassed(result);
     }
 
@@ -60,38 +60,46 @@ class ImageCachePolicyTest extends React.Component<Props, $FlowFixMeState> {
     return (
       <View style={{flex: 1}}>
         <Text>Hello</Text>
-      <Image
-        source={{
-              uri: 'https://facebook.github.io/react-native/img/favicon.png?cacheBust=notinCache' + Date.now(),
-              cache: 'only-if-cached'
-            }}
-        onLoad={() => this.testComplete('only-if-cached', false)}
-        onError={() => this.testComplete('only-if-cached', true)}
-        style={styles.base}
-      />
         <Image
           source={{
-              uri: 'https://facebook.github.io/react-native/img/favicon.png?cacheBust=notinCache' + Date.now(),
-              cache: 'default'
-            }}
+            uri:
+              'https://facebook.github.io/react-native/img/favicon.png?cacheBust=notinCache' +
+              Date.now(),
+            cache: 'only-if-cached',
+          }}
+          onLoad={() => this.testComplete('only-if-cached', false)}
+          onError={() => this.testComplete('only-if-cached', true)}
+          style={styles.base}
+        />
+        <Image
+          source={{
+            uri:
+              'https://facebook.github.io/react-native/img/favicon.png?cacheBust=notinCache' +
+              Date.now(),
+            cache: 'default',
+          }}
           onLoad={() => this.testComplete('default', true)}
           onError={() => this.testComplete('default', false)}
           style={styles.base}
         />
         <Image
           source={{
-              uri: 'https://facebook.github.io/react-native/img/favicon.png?cacheBust=notinCache' + Date.now(),
-              cache: 'reload'
-            }}
+            uri:
+              'https://facebook.github.io/react-native/img/favicon.png?cacheBust=notinCache' +
+              Date.now(),
+            cache: 'reload',
+          }}
           onLoad={() => this.testComplete('reload', true)}
           onError={() => this.testComplete('reload', false)}
           style={styles.base}
         />
         <Image
           source={{
-              uri: 'https://facebook.github.io/react-native/img/favicon.png?cacheBust=notinCache' + Date.now(),
-              cache: 'force-cache'
-            }}
+            uri:
+              'https://facebook.github.io/react-native/img/favicon.png?cacheBust=notinCache' +
+              Date.now(),
+            cache: 'force-cache',
+          }}
           onLoad={() => this.testComplete('force-cache', true)}
           onError={() => this.testComplete('force-cache', false)}
           style={styles.base}
diff --git a/IntegrationTests/ImageSnapshotTest.js b/IntegrationTests/ImageSnapshotTest.js
index 3d024d569..5c74433a9 100644
--- a/IntegrationTests/ImageSnapshotTest.js
+++ b/IntegrationTests/ImageSnapshotTest.js
@@ -4,17 +4,16 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
 var ReactNative = require('react-native');
-var {
-  Image,
-  View,
-} = ReactNative;
-var { TestModule } = ReactNative.NativeModules;
+var {Image, View} = ReactNative;
+var {TestModule} = ReactNative.NativeModules;
 
 class ImageSnapshotTest extends React.Component<{}> {
   componentDidMount() {
@@ -23,7 +22,7 @@ class ImageSnapshotTest extends React.Component<{}> {
     }
   }
 
-  done = (success : boolean) => {
+  done = (success: boolean) => {
     TestModule.markTestPassed(success);
   };
 
@@ -32,7 +31,8 @@ class ImageSnapshotTest extends React.Component<{}> {
       <Image
         source={require('./blue_square.png')}
         defaultSource={require('./red_square.png')}
-        onLoad={() => TestModule.verifySnapshot(this.done)} />
+        onLoad={() => TestModule.verifySnapshot(this.done)}
+      />
     );
   }
 }
diff --git a/IntegrationTests/IntegrationTestHarnessTest.js b/IntegrationTests/IntegrationTestHarnessTest.js
index 9b34065b8..2a596d068 100644
--- a/IntegrationTests/IntegrationTestHarnessTest.js
+++ b/IntegrationTests/IntegrationTestHarnessTest.js
@@ -4,8 +4,10 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 /* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an error
@@ -15,16 +17,16 @@ var requestAnimationFrame = require('fbjs/lib/requestAnimationFrame');
 var React = require('react');
 var PropTypes = require('prop-types');
 var ReactNative = require('react-native');
-var {
-  Text,
-  View,
-} = ReactNative;
-var { TestModule } = ReactNative.NativeModules;
+var {Text, View} = ReactNative;
+var {TestModule} = ReactNative.NativeModules;
 
-class IntegrationTestHarnessTest extends React.Component<{
-  shouldThrow?: boolean,
-  waitOneFrame?: boolean,
-}, $FlowFixMeState> {
+class IntegrationTestHarnessTest extends React.Component<
+  {
+    shouldThrow?: boolean,
+    waitOneFrame?: boolean,
+  },
+  $FlowFixMeState,
+> {
   static propTypes = {
     shouldThrow: PropTypes.bool,
     waitOneFrame: PropTypes.bool,
@@ -60,11 +62,10 @@ class IntegrationTestHarnessTest extends React.Component<{
     return (
       <View style={{backgroundColor: 'white', padding: 40}}>
         <Text>
-          {
-            /* $FlowFixMe(>=0.54.0 site=react_native_fb,react_native_oss) This
+          {/* $FlowFixMe(>=0.54.0 site=react_native_fb,react_native_oss) This
              * comment suppresses an error found when Flow v0.54 was deployed.
              * To see the error delete this comment and run Flow. */
-            this.constructor.displayName + ': '}
+          this.constructor.displayName + ': '}
           {this.state.done ? 'Done' : 'Testing...'}
         </Text>
       </View>
diff --git a/IntegrationTests/IntegrationTestsApp.js b/IntegrationTests/IntegrationTestsApp.js
index 62f6fa830..c59f15b3d 100644
--- a/IntegrationTests/IntegrationTestsApp.js
+++ b/IntegrationTests/IntegrationTestsApp.js
@@ -4,8 +4,10 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
@@ -40,7 +42,7 @@ TESTS.forEach(
   /* $FlowFixMe(>=0.54.0 site=react_native_fb,react_native_oss) This comment
    * suppresses an error found when Flow v0.54 was deployed. To see the error
    * delete this comment and run Flow. */
-  (test) => AppRegistry.registerComponent(test.displayName, () => test)
+  test => AppRegistry.registerComponent(test.displayName, () => test),
 );
 
 // Modules required for integration tests
@@ -68,20 +70,18 @@ class IntegrationTestsApp extends React.Component<{}, $FlowFixMeState> {
       <View style={styles.container}>
         <Text style={styles.row}>
           Click on a test to run it in this shell for easier debugging and
-          development.  Run all tests in the testing environment with cmd+U in
+          development. Run all tests in the testing environment with cmd+U in
           Xcode.
         </Text>
         <View style={styles.separator} />
         <ScrollView>
-          {TESTS.map((test) => [
+          {TESTS.map(test => [
             <TouchableOpacity
               onPress={() => this.setState({test})}
               style={styles.row}>
-              <Text style={styles.testName}>
-                {test.displayName}
-              </Text>
+              <Text style={styles.testName}>{test.displayName}</Text>
             </TouchableOpacity>,
-            <View style={styles.separator} />
+            <View style={styles.separator} />,
           ])}
         </ScrollView>
       </View>
diff --git a/IntegrationTests/LayoutEventsTest.js b/IntegrationTests/LayoutEventsTest.js
index 31dd1839c..b9183a34e 100644
--- a/IntegrationTests/LayoutEventsTest.js
+++ b/IntegrationTests/LayoutEventsTest.js
@@ -4,21 +4,17 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
 var createReactClass = require('create-react-class');
 var ReactNative = require('react-native');
-var {
-  Image,
-  LayoutAnimation,
-  StyleSheet,
-  Text,
-  View,
-} = ReactNative;
-var { TestModule } = ReactNative.NativeModules;
+var {Image, LayoutAnimation, StyleSheet, Text, View} = ReactNative;
+var {TestModule} = ReactNative.NativeModules;
 
 var deepDiffer = require('deepDiffer');
 
@@ -55,27 +51,23 @@ var LayoutEventsTest = createReactClass({
   },
   animateViewLayout: function() {
     debug('animateViewLayout invoked');
-    LayoutAnimation.configureNext(
-      LayoutAnimation.Presets.spring,
-      () => {
-        debug('animateViewLayout done');
-        this.checkLayout(this.addWrapText);
-      }
-    );
+    LayoutAnimation.configureNext(LayoutAnimation.Presets.spring, () => {
+      debug('animateViewLayout done');
+      this.checkLayout(this.addWrapText);
+    });
     this.setState({viewStyle: {margin: 60}});
   },
   addWrapText: function() {
     debug('addWrapText invoked');
     this.setState(
       {extraText: '  And a bunch more text to wrap around a few lines.'},
-      () => this.checkLayout(this.changeContainer)
+      () => this.checkLayout(this.changeContainer),
     );
   },
   changeContainer: function() {
     debug('changeContainer invoked');
-    this.setState(
-      {containerStyle: {width: 280}},
-      () => this.checkLayout(TestModule.markTestCompleted)
+    this.setState({containerStyle: {width: 280}}, () =>
+      this.checkLayout(TestModule.markTestCompleted),
     );
   },
   checkLayout: function(next?: ?Function) {
@@ -103,8 +95,9 @@ var LayoutEventsTest = createReactClass({
     if (deepDiffer(measured, onLayout)) {
       var data = {measured, onLayout};
       throw new Error(
-        node + ' onLayout mismatch with measure ' +
-          JSON.stringify(data, null, '  ')
+        node +
+          ' onLayout mismatch with measure ' +
+          JSON.stringify(data, null, '  '),
       );
     }
   },
@@ -145,7 +138,7 @@ var LayoutEventsTest = createReactClass({
         </View>
       </View>
     );
-  }
+  },
 });
 
 var styles = StyleSheet.create({
diff --git a/IntegrationTests/LoggingTestModule.js b/IntegrationTests/LoggingTestModule.js
index df2b0e59b..76a4fbccd 100644
--- a/IntegrationTests/LoggingTestModule.js
+++ b/IntegrationTests/LoggingTestModule.js
@@ -4,7 +4,9 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  */
+
 'use strict';
 
 var BatchedBridge = require('BatchedBridge');
@@ -16,7 +18,7 @@ var LoggingTestModule = {
   logToConsole: function(str) {
     console.log(str);
   },
-  logToConsoleAfterWait: function(str,timeout_ms) {
+  logToConsoleAfterWait: function(str, timeout_ms) {
     setTimeout(function() {
       console.log(str);
     }, timeout_ms);
@@ -32,12 +34,9 @@ var LoggingTestModule = {
   },
   throwError: function(str) {
     throw new Error(str);
-  }
+  },
 };
 
-BatchedBridge.registerCallableModule(
-  'LoggingTestModule',
-  LoggingTestModule
-);
+BatchedBridge.registerCallableModule('LoggingTestModule', LoggingTestModule);
 
 module.exports = LoggingTestModule;
diff --git a/IntegrationTests/PromiseTest.js b/IntegrationTests/PromiseTest.js
index 21005576d..3e919a867 100644
--- a/IntegrationTests/PromiseTest.js
+++ b/IntegrationTests/PromiseTest.js
@@ -4,14 +4,16 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
 var ReactNative = require('react-native');
-var { View } = ReactNative;
-var { TestModule } = ReactNative.NativeModules;
+var {View} = ReactNative;
+var {TestModule} = ReactNative.NativeModules;
 
 class PromiseTest extends React.Component<{}> {
   shouldResolve = false;
@@ -25,24 +27,26 @@ class PromiseTest extends React.Component<{}> {
       this.testShouldReject(),
       this.testShouldSucceedAsync(),
       this.testShouldThrowAsync(),
-    ]).then(() => TestModule.markTestPassed(
-      this.shouldResolve && this.shouldReject &&
-      this.shouldSucceedAsync && this.shouldThrowAsync
-    ));
+    ]).then(() =>
+      TestModule.markTestPassed(
+        this.shouldResolve &&
+          this.shouldReject &&
+          this.shouldSucceedAsync &&
+          this.shouldThrowAsync,
+      ),
+    );
   }
 
   testShouldResolve = () => {
-    return TestModule
-      .shouldResolve()
-      .then(() => this.shouldResolve = true)
-      .catch(() => this.shouldResolve = false);
+    return TestModule.shouldResolve()
+      .then(() => (this.shouldResolve = true))
+      .catch(() => (this.shouldResolve = false));
   };
 
   testShouldReject = () => {
-    return TestModule
-      .shouldReject()
-      .then(() => this.shouldReject = false)
-      .catch(() => this.shouldReject = true);
+    return TestModule.shouldReject()
+      .then(() => (this.shouldReject = false))
+      .catch(() => (this.shouldReject = true));
   };
 
   testShouldSucceedAsync = async (): Promise<any> => {
diff --git a/IntegrationTests/PropertiesUpdateTest.js b/IntegrationTests/PropertiesUpdateTest.js
index 3d93d9d0a..e2c16f3a6 100644
--- a/IntegrationTests/PropertiesUpdateTest.js
+++ b/IntegrationTests/PropertiesUpdateTest.js
@@ -3,25 +3,24 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
+ *
+ * @format
  */
+
 'use strict';
 
 var React = require('react');
 var ReactNative = require('react-native');
-var {
-  View,
-} = ReactNative;
+var {View} = ReactNative;
 
-var { TestModule } = ReactNative.NativeModules;
+var {TestModule} = ReactNative.NativeModules;
 
 class PropertiesUpdateTest extends React.Component {
   render() {
     if (this.props.markTestPassed) {
       TestModule.markTestPassed(true);
     }
-    return (
-      <View/>
-    );
+    return <View />;
   }
 }
 
diff --git a/IntegrationTests/RCTRootViewIntegrationTestApp.js b/IntegrationTests/RCTRootViewIntegrationTestApp.js
index aef56f975..8cb499f36 100644
--- a/IntegrationTests/RCTRootViewIntegrationTestApp.js
+++ b/IntegrationTests/RCTRootViewIntegrationTestApp.js
@@ -4,7 +4,9 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  */
+
 'use strict';
 
 require('regenerator-runtime/runtime');
@@ -28,8 +30,8 @@ var TESTS = [
   require('./SizeFlexibilityUpdateTest'),
 ];
 
-TESTS.forEach(
-  (test) => AppRegistry.registerComponent(test.displayName, () => test)
+TESTS.forEach(test =>
+  AppRegistry.registerComponent(test.displayName, () => test),
 );
 
 class RCTRootViewIntegrationTestApp extends React.Component {
@@ -49,20 +51,18 @@ class RCTRootViewIntegrationTestApp extends React.Component {
       <View style={styles.container}>
         <Text style={styles.row}>
           Click on a test to run it in this shell for easier debugging and
-          development.  Run all tests in the testing environment with cmd+U in
+          development. Run all tests in the testing environment with cmd+U in
           Xcode.
         </Text>
         <View style={styles.separator} />
         <ScrollView>
-          {TESTS.map((test) => [
+          {TESTS.map(test => [
             <TouchableOpacity
               onPress={() => this.setState({test})}
               style={styles.row}>
-              <Text style={styles.testName}>
-                {test.displayName}
-              </Text>
+              <Text style={styles.testName}>{test.displayName}</Text>
             </TouchableOpacity>,
-            <View style={styles.separator} />
+            <View style={styles.separator} />,
           ])}
         </ScrollView>
       </View>
@@ -88,4 +88,7 @@ var styles = StyleSheet.create({
   },
 });
 
-AppRegistry.registerComponent('RCTRootViewIntegrationTestApp', () => RCTRootViewIntegrationTestApp);
+AppRegistry.registerComponent(
+  'RCTRootViewIntegrationTestApp',
+  () => RCTRootViewIntegrationTestApp,
+);
diff --git a/IntegrationTests/ReactContentSizeUpdateTest.js b/IntegrationTests/ReactContentSizeUpdateTest.js
index dda42b4df..1306f8d7a 100644
--- a/IntegrationTests/ReactContentSizeUpdateTest.js
+++ b/IntegrationTests/ReactContentSizeUpdateTest.js
@@ -3,7 +3,10 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
+ *
+ * @format
  */
+
 'use strict';
 
 var React = require('react');
@@ -13,9 +16,9 @@ var RCTNativeAppEventEmitter = require('RCTNativeAppEventEmitter');
 var Subscribable = require('Subscribable');
 var TimerMixin = require('react-timer-mixin');
 
-var { View } = ReactNative;
+var {View} = ReactNative;
 
-var { TestModule } = ReactNative.NativeModules;
+var {TestModule} = ReactNative.NativeModules;
 
 var reactViewWidth = 101;
 var reactViewHeight = 102;
@@ -24,14 +27,13 @@ var newReactViewHeight = 202;
 
 var ReactContentSizeUpdateTest = createReactClass({
   displayName: 'ReactContentSizeUpdateTest',
-  mixins: [Subscribable.Mixin,
-           TimerMixin],
+  mixins: [Subscribable.Mixin, TimerMixin],
 
   UNSAFE_componentWillMount: function() {
     this.addListenerOn(
       RCTNativeAppEventEmitter,
       'rootViewDidChangeIntrinsicSize',
-      this.rootViewDidChangeIntrinsicSize
+      this.rootViewDidChangeIntrinsicSize,
     );
   },
 
@@ -50,23 +52,25 @@ var ReactContentSizeUpdateTest = createReactClass({
   },
 
   componentDidMount: function() {
-    this.setTimeout(
-      () => { this.updateViewSize(); },
-      1000
-    );
+    this.setTimeout(() => {
+      this.updateViewSize();
+    }, 1000);
   },
 
   rootViewDidChangeIntrinsicSize: function(intrinsicSize) {
-    if (intrinsicSize.height === newReactViewHeight && intrinsicSize.width === newReactViewWidth) {
+    if (
+      intrinsicSize.height === newReactViewHeight &&
+      intrinsicSize.width === newReactViewWidth
+    ) {
       TestModule.markTestPassed(true);
     }
   },
 
   render() {
     return (
-      <View style={{'height':this.state.height, 'width':this.state.width}}/>
+      <View style={{height: this.state.height, width: this.state.width}} />
     );
-  }
+  },
 });
 
 ReactContentSizeUpdateTest.displayName = 'ReactContentSizeUpdateTest';
diff --git a/IntegrationTests/SimpleSnapshotTest.js b/IntegrationTests/SimpleSnapshotTest.js
index dd8bf9ac8..ea32c4a9a 100644
--- a/IntegrationTests/SimpleSnapshotTest.js
+++ b/IntegrationTests/SimpleSnapshotTest.js
@@ -4,8 +4,10 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
@@ -15,11 +17,8 @@ var ReactNative = require('react-native');
  * run Flow. */
 var requestAnimationFrame = require('fbjs/lib/requestAnimationFrame');
 
-var {
-  StyleSheet,
-  View,
-} = ReactNative;
-var { TestModule } = ReactNative.NativeModules;
+var {StyleSheet, View} = ReactNative;
+var {TestModule} = ReactNative.NativeModules;
 
 class SimpleSnapshotTest extends React.Component<{}> {
   componentDidMount() {
@@ -29,7 +28,7 @@ class SimpleSnapshotTest extends React.Component<{}> {
     requestAnimationFrame(() => TestModule.verifySnapshot(this.done));
   }
 
-  done = (success : boolean) => {
+  done = (success: boolean) => {
     TestModule.markTestPassed(success);
   };
 
diff --git a/IntegrationTests/SizeFlexibilityUpdateTest.js b/IntegrationTests/SizeFlexibilityUpdateTest.js
index ce0be9e6e..5f885ddb7 100644
--- a/IntegrationTests/SizeFlexibilityUpdateTest.js
+++ b/IntegrationTests/SizeFlexibilityUpdateTest.js
@@ -3,7 +3,10 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
+ *
+ * @format
  */
+
 'use strict';
 
 var React = require('react');
@@ -11,9 +14,9 @@ var createReactClass = require('create-react-class');
 var ReactNative = require('react-native');
 var RCTNativeAppEventEmitter = require('RCTNativeAppEventEmitter');
 var Subscribable = require('Subscribable');
-var { View } = ReactNative;
+var {View} = ReactNative;
 
-var { TestModule } = ReactNative.NativeModules;
+var {TestModule} = ReactNative.NativeModules;
 
 var reactViewWidth = 111;
 var reactViewHeight = 222;
@@ -28,7 +31,7 @@ var SizeFlexibilityUpdateTest = createReactClass({
     this.addListenerOn(
       RCTNativeAppEventEmitter,
       'rootViewDidChangeIntrinsicSize',
-      this.rootViewDidChangeIntrinsicSize
+      this.rootViewDidChangeIntrinsicSize,
     );
   },
 
@@ -38,7 +41,6 @@ var SizeFlexibilityUpdateTest = createReactClass({
   },
 
   rootViewDidChangeIntrinsicSize: function(intrinsicSize) {
-
     if (finalState) {
       // If a test reaches its final state, it is not expected to do anything more
       TestModule.markTestPassed(false);
@@ -46,25 +48,37 @@ var SizeFlexibilityUpdateTest = createReactClass({
     }
 
     if (this.props.both) {
-      if (intrinsicSize.width === reactViewWidth && intrinsicSize.height === reactViewHeight) {
+      if (
+        intrinsicSize.width === reactViewWidth &&
+        intrinsicSize.height === reactViewHeight
+      ) {
         this.markPassed();
         return;
       }
     }
     if (this.props.height) {
-      if (intrinsicSize.width !== reactViewWidth && intrinsicSize.height === reactViewHeight) {
+      if (
+        intrinsicSize.width !== reactViewWidth &&
+        intrinsicSize.height === reactViewHeight
+      ) {
         this.markPassed();
         return;
       }
     }
     if (this.props.width) {
-      if (intrinsicSize.width === reactViewWidth && intrinsicSize.height !== reactViewHeight) {
+      if (
+        intrinsicSize.width === reactViewWidth &&
+        intrinsicSize.height !== reactViewHeight
+      ) {
         this.markPassed();
         return;
       }
     }
     if (this.props.none) {
-      if (intrinsicSize.width !== reactViewWidth && intrinsicSize.height !== reactViewHeight) {
+      if (
+        intrinsicSize.width !== reactViewWidth &&
+        intrinsicSize.height !== reactViewHeight
+      ) {
         this.markPassed();
         return;
       }
@@ -72,10 +86,8 @@ var SizeFlexibilityUpdateTest = createReactClass({
   },
 
   render() {
-    return (
-      <View style={{'height':reactViewHeight, 'width':reactViewWidth}}/>
-    );
-  }
+    return <View style={{height: reactViewHeight, width: reactViewWidth}} />;
+  },
 });
 
 SizeFlexibilityUpdateTest.displayName = 'SizeFlexibilityUpdateTest';
diff --git a/IntegrationTests/SyncMethodTest.js b/IntegrationTests/SyncMethodTest.js
index f61f52b36..eca1df986 100644
--- a/IntegrationTests/SyncMethodTest.js
+++ b/IntegrationTests/SyncMethodTest.js
@@ -4,23 +4,23 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
 var ReactNative = require('react-native');
-var { View } = ReactNative;
-
-const {
-  TestModule,
-  RNTesterTestModule,
-} = ReactNative.NativeModules;
+var {View} = ReactNative;
 
+const {TestModule, RNTesterTestModule} = ReactNative.NativeModules;
 
 class SyncMethodTest extends React.Component<{}> {
   componentDidMount() {
-    if (RNTesterTestModule.echoString('test string value') !== 'test string value') {
+    if (
+      RNTesterTestModule.echoString('test string value') !== 'test string value'
+    ) {
       throw new Error('Something wrong with sync method export');
     }
     if (RNTesterTestModule.methodThatReturnsNil() != null) {
diff --git a/IntegrationTests/TimersTest.js b/IntegrationTests/TimersTest.js
index f40742c9a..86e1a9621 100644
--- a/IntegrationTests/TimersTest.js
+++ b/IntegrationTests/TimersTest.js
@@ -4,8 +4,10 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
@@ -16,12 +18,8 @@ var ReactNative = require('react-native');
  * run Flow. */
 var TimerMixin = require('react-timer-mixin');
 
-var {
-  StyleSheet,
-  Text,
-  View,
-} = ReactNative;
-var { TestModule  } = ReactNative.NativeModules;
+var {StyleSheet, Text, View} = ReactNative;
+var {TestModule} = ReactNative.NativeModules;
 
 var TimersTest = createReactClass({
   displayName: 'TimersTest',
@@ -91,7 +89,7 @@ var TimersTest = createReactClass({
     fails.push(this.setTimeout(() => this._fail('testClearMulti-4'), 0));
     fails.push(this.setTimeout(() => this._fail('testClearMulti-5'), 10));
 
-    fails.forEach((timeout) => this.clearTimeout(timeout));
+    fails.forEach(timeout => this.clearTimeout(timeout));
     this.setTimeout(() => this.clearTimeout(delayClear), 20);
 
     this.setTimeout(this.testOrdering, 50);
@@ -102,22 +100,32 @@ var TimersTest = createReactClass({
     var fail0;
     this.setImmediate(() => this.clearTimeout(fail0));
     fail0 = this.setTimeout(
-      () => this._fail('testOrdering-t0, setImmediate should happen before ' +
-        'setTimeout 0'),
-      0
+      () =>
+        this._fail(
+          'testOrdering-t0, setImmediate should happen before ' +
+            'setTimeout 0',
+        ),
+      0,
     );
     var failAnim; // This should fail without the t=0 fastpath feature.
     this.setTimeout(() => this.cancelAnimationFrame(failAnim), 0);
-    failAnim = this.requestAnimationFrame(
-      () => this._fail('testOrdering-Anim, setTimeout 0 should happen before ' +
-        'requestAnimationFrame')
+    failAnim = this.requestAnimationFrame(() =>
+      this._fail(
+        'testOrdering-Anim, setTimeout 0 should happen before ' +
+          'requestAnimationFrame',
+      ),
     );
     var fail25;
-    this.setTimeout(() => { this.clearTimeout(fail25); }, 20);
+    this.setTimeout(() => {
+      this.clearTimeout(fail25);
+    }, 20);
     fail25 = this.setTimeout(
-      () => this._fail('testOrdering-t25, setTimeout 20 should happen before ' +
-        'setTimeout 25'),
-      25
+      () =>
+        this._fail(
+          'testOrdering-t25, setTimeout 20 should happen before ' +
+            'setTimeout 25',
+        ),
+      25,
     );
     this.setTimeout(this.done, 50);
   },
@@ -152,7 +160,7 @@ var TimersTest = createReactClass({
     this.setState({count: this.state.count + 1});
   },
 
-  _fail(caller : string) : void {
+  _fail(caller: string): void {
     throw new Error('_fail called by ' + caller);
   },
 });
diff --git a/IntegrationTests/WebSocketTest.js b/IntegrationTests/WebSocketTest.js
index de8428f79..33d6b2500 100644
--- a/IntegrationTests/WebSocketTest.js
+++ b/IntegrationTests/WebSocketTest.js
@@ -4,23 +4,20 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  * @flow
  */
+
 'use strict';
 
 var React = require('react');
 var ReactNative = require('react-native');
-var { View } = ReactNative;
-var { TestModule } = ReactNative.NativeModules;
+var {View} = ReactNative;
+var {TestModule} = ReactNative.NativeModules;
 
 const DEFAULT_WS_URL = 'ws://localhost:5555/';
 
-const WS_EVENTS = [
-  'close',
-  'error',
-  'message',
-  'open',
-];
+const WS_EVENTS = ['close', 'error', 'message', 'open'];
 const WS_STATES = [
   /* 0 */ 'CONNECTING',
   /* 1 */ 'OPEN',
@@ -29,14 +26,14 @@ const WS_STATES = [
 ];
 
 type State = {
-  url: string;
-  fetchStatus: ?string;
-  socket: ?WebSocket;
-  socketState: ?number;
-  lastSocketEvent: ?string;
-  lastMessage: ?string | ?ArrayBuffer;
-  testMessage: string;
-  testExpectedResponse: string;
+  url: string,
+  fetchStatus: ?string,
+  socket: ?WebSocket,
+  socketState: ?number,
+  lastSocketEvent: ?string,
+  lastMessage: ?string | ?ArrayBuffer,
+  testMessage: string,
+  testExpectedResponse: string,
 };
 
 class WebSocketTest extends React.Component<{}, State> {
@@ -48,13 +45,13 @@ class WebSocketTest extends React.Component<{}, State> {
     lastSocketEvent: null,
     lastMessage: null,
     testMessage: 'testMessage',
-    testExpectedResponse: 'testMessage_response'
+    testExpectedResponse: 'testMessage_response',
   };
 
   _waitFor = (condition: any, timeout: any, callback: any) => {
     var remaining = timeout;
     var t;
-    var timeoutFunction =  function() {
+    var timeoutFunction = function() {
       if (condition()) {
         callback(true);
         return;
@@ -63,11 +60,11 @@ class WebSocketTest extends React.Component<{}, State> {
       if (remaining === 0) {
         callback(false);
       } else {
-        t = setTimeout(timeoutFunction,1000);
+        t = setTimeout(timeoutFunction, 1000);
       }
     };
-    t = setTimeout(timeoutFunction,1000);
-  }
+    t = setTimeout(timeoutFunction, 1000);
+  };
 
   _connect = () => {
     const socket = new WebSocket(this.state.url);
@@ -80,11 +77,11 @@ class WebSocketTest extends React.Component<{}, State> {
 
   _socketIsConnected = () => {
     return this.state.socketState === 1; //'OPEN'
-  }
+  };
 
   _socketIsDisconnected = () => {
     return this.state.socketState === 3; //'CLOSED'
-  }
+  };
 
   _disconnect = () => {
     if (!this.state.socket) {
@@ -116,7 +113,7 @@ class WebSocketTest extends React.Component<{}, State> {
   };
 
   _receivedTestExpectedResponse = () => {
-    return (this.state.lastMessage === this.state.testExpectedResponse);
+    return this.state.lastMessage === this.state.testExpectedResponse;
   };
 
   componentDidMount() {
@@ -126,34 +123,40 @@ class WebSocketTest extends React.Component<{}, State> {
   testConnect = () => {
     var component = this;
     component._connect();
-    component._waitFor(component._socketIsConnected, 5, function(connectSucceeded) {
+    component._waitFor(component._socketIsConnected, 5, function(
+      connectSucceeded,
+    ) {
       if (!connectSucceeded) {
         TestModule.markTestPassed(false);
         return;
       }
       component.testSendAndReceive();
     });
-  }
+  };
 
   testSendAndReceive = () => {
     var component = this;
     component._sendTestMessage();
-    component._waitFor(component._receivedTestExpectedResponse, 5, function(messageReceived) {
+    component._waitFor(component._receivedTestExpectedResponse, 5, function(
+      messageReceived,
+    ) {
       if (!messageReceived) {
         TestModule.markTestPassed(false);
         return;
       }
       component.testDisconnect();
     });
-  }
+  };
 
   testDisconnect = () => {
     var component = this;
     component._disconnect();
-    component._waitFor(component._socketIsDisconnected, 5, function(disconnectSucceeded) {
+    component._waitFor(component._socketIsDisconnected, 5, function(
+      disconnectSucceeded,
+    ) {
       TestModule.markTestPassed(disconnectSucceeded);
     });
-  }
+  };
 
   render(): React.Node {
     return <View />;
diff --git a/IntegrationTests/WebViewTest.js b/IntegrationTests/WebViewTest.js
index 818b4e980..47b4544cd 100644
--- a/IntegrationTests/WebViewTest.js
+++ b/IntegrationTests/WebViewTest.js
@@ -4,52 +4,68 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  */
+
 'use strict';
 
 var React = require('react');
 var ReactNative = require('react-native');
-var {
-  WebView,
-} = ReactNative;
+var {WebView} = ReactNative;
 
-var { TestModule } = ReactNative.NativeModules;
+var {TestModule} = ReactNative.NativeModules;
 
 class WebViewTest extends React.Component {
-
   render() {
     var firstMessageReceived = false;
     var secondMessageReceived = false;
     function processMessage(e) {
       var message = e.nativeEvent.data;
-      if (message === 'First') {firstMessageReceived = true;}
-      if (message === 'Second') {secondMessageReceived = true;}
+      if (message === 'First') {
+        firstMessageReceived = true;
+      }
+      if (message === 'Second') {
+        secondMessageReceived = true;
+      }
 
       // got both messages
-      if (firstMessageReceived && secondMessageReceived) {TestModule.markTestPassed(true);}
+      if (firstMessageReceived && secondMessageReceived) {
+        TestModule.markTestPassed(true);
+      }
       // wait for next message
-      else if (firstMessageReceived && !secondMessageReceived) {return;}
+      else if (firstMessageReceived && !secondMessageReceived) {
+        return;
+      }
       // first message got lost
-      else if (!firstMessageReceived && secondMessageReceived) {throw new Error('First message got lost');}
+      else if (!firstMessageReceived && secondMessageReceived) {
+        throw new Error('First message got lost');
+      }
     }
-    var html = 'Hello world'
-      + '<script>'
-      + "window.setTimeout(function(){window.postMessage('First'); window.postMessage('Second')}, 0)"
-      + '</script>';
+    var html =
+      'Hello world' +
+      '<script>' +
+      "window.setTimeout(function(){window.postMessage('First'); window.postMessage('Second')}, 0)" +
+      '</script>';
 
     // fail if messages didn't get through;
-    window.setTimeout(function() { throw new Error(firstMessageReceived ? 'Both messages got lost' : 'Second message got lost');}, 10000);
+    window.setTimeout(function() {
+      throw new Error(
+        firstMessageReceived
+          ? 'Both messages got lost'
+          : 'Second message got lost',
+      );
+    }, 10000);
 
     var source = {
       html: html,
-      };
+    };
 
     return (
       <WebView
         source={source}
-        onMessage = {processMessage}
+        onMessage={processMessage}
         originWhitelist={['about:blank']}
-        />
+      />
     );
   }
 }