RN: Remove fbjs/warning Dependency

Summary:
Replaces `fbjs/warning` call sites in React Native with `console.warn`. A few warnings will now log as warnings without the "Warning:" prefix.

Changelog:
[General][Changed] - Some warnings changed to use `console.warn` without the "Warning:" prefix.

Reviewed By: TheSavior, cpojer

Differential Revision: D22445946

fbshipit-source-id: 96b01e1bdee52b89ff3b808bc9d6cd494f6787f5

Author: yungsters

IntegrationTests/LoggingTestModule.js

@@ -11,7 +11,6 @@
 
 const BatchedBridge = require('react-native/Libraries/BatchedBridge/BatchedBridge');
 
-const warning = require('fbjs/lib/warning');
 const invariant = require('invariant');
 
 const LoggingTestModule = {
@@ -24,7 +23,7 @@ const LoggingTestModule = {
     }, timeout_ms);
   },
   warning: function(str) {
-    warning(false, str);
+    console.warn(str);
   },
   invariant: function(str) {
     invariant(false, str);

Libraries/Components/ToastAndroid/ToastAndroid.ios.js

@@ -10,19 +10,17 @@
 
 'use strict';
 
-const warning = require('fbjs/lib/warning');
-
 const ToastAndroid = {
   show: function(message: string, duration: number): void {
-    warning(false, 'ToastAndroid is not supported on this platform.');
+    console.warn('ToastAndroid is not supported on this platform.');
   },
 
   showWithGravity: function(
     message: string,
     duration: number,
     gravity: number,
   ): void {
-    warning(false, 'ToastAndroid is not supported on this platform.');
+    console.warn('ToastAndroid is not supported on this platform.');
   },
 
   showWithGravityAndOffset: function(
@@ -32,7 +30,7 @@ const ToastAndroid = {
     xOffset: number,
     yOffset: number,
   ): void {
-    warning(false, 'ToastAndroid is not supported on this platform.');
+    console.warn('ToastAndroid is not supported on this platform.');
   },
 };
 

Libraries/Core/Timers/JSTimers.js

@@ -81,11 +81,12 @@ function _allocateCallback(func: Function, type: JSTimerType): number {
  * recurring (setInterval).
  */
 function _callTimer(timerID: number, frameTime: number, didTimeout: ?boolean) {
-  require('fbjs/lib/warning')(
-    timerID <= GUID,
-    'Tried to call timer with ID %s but no such timer exists.',
-    timerID,
-  );
+  if (timerID > GUID) {
+    console.warn(
+      'Tried to call timer with ID %s but no such timer exists.',
+      timerID,
+    );
+  }
 
   // timerIndex of -1 means that no timer with that ID exists. There are
   // two situations when this happens, when a garbage timer ID was given

Libraries/Core/Timers/__tests__/JSTimers-test.js

@@ -16,11 +16,8 @@ const NativeTiming = {
   setSendIdleEvents: jest.fn(),
 };
 
-const warning = jest.fn();
-
 jest
   .enableAutomock()
-  .mock('fbjs/lib/warning', () => warning, {virtual: true})
   .mock('../NativeTiming', () => ({
     __esModule: true,
     default: NativeTiming,
@@ -30,14 +27,15 @@ jest
 const JSTimers = require('../JSTimers');
 
 describe('JSTimers', function() {
-  const firstArgumentOfTheLastCallTo = function(func) {
-    return func.mock.calls[func.mock.calls.length - 1][0];
-  };
-
   beforeEach(function() {
+    jest.spyOn(console, 'warn');
     global.setTimeout = JSTimers.setTimeout;
   });
 
+  afterEach(() => {
+    console.warn.mockRestore();
+  });
+
   it('should call function with setTimeout', function() {
     let didCall = false;
     const id = JSTimers.setTimeout(function() {
@@ -277,12 +275,12 @@ describe('JSTimers', function() {
     JSTimers.clearTimeout(timerID);
     JSTimers.callTimers([timerID]);
     expect(callback).not.toBeCalled();
-    expect(firstArgumentOfTheLastCallTo(warning)).toBe(true);
+    expect(console.warn).not.toBeCalled();
   });
 
   it('should warn when callTimers is called with garbage timer id', function() {
     JSTimers.callTimers([1337]);
-    expect(firstArgumentOfTheLastCallTo(warning)).toBe(false);
+    expect(console.warn).toBeCalled();
   });
 
   it('should only call callback once for setTimeout', function() {
@@ -294,7 +292,7 @@ describe('JSTimers', function() {
     // Second time it should be ignored
     JSTimers.callTimers([timerID]);
     expect(callback).toBeCalledTimes(1);
-    expect(firstArgumentOfTheLastCallTo(warning)).toBe(true);
+    expect(console.warn).not.toBeCalled();
   });
 
   it('should only call callback once for requestAnimationFrame', function() {
@@ -306,7 +304,7 @@ describe('JSTimers', function() {
     // Second time it should be ignored
     JSTimers.callTimers([timerID]);
     expect(callback).toBeCalledTimes(1);
-    expect(firstArgumentOfTheLastCallTo(warning)).toBe(true);
+    expect(console.warn).not.toBeCalled();
   });
 
   it('should re-throw first exception', function() {

Libraries/Lists/FillRateHelper.js

@@ -59,10 +59,9 @@ class FillRateHelper {
   static addListener(
     callback: FillRateInfo => void,
   ): {remove: () => void, ...} {
-    warning(
-      _sampleRate !== null,
-      'Call `FillRateHelper.setSampleRate` before `addListener`.',
-    );
+    if (_sampleRate === null) {
+      console.warn('Call `FillRateHelper.setSampleRate` before `addListener`.');
+    }
     _listeners.push(callback);
     return {
       remove: () => {

Libraries/Lists/VirtualizedList.js

@@ -22,7 +22,6 @@ const ViewabilityHelper = require('./ViewabilityHelper');
 const flattenStyle = require('../StyleSheet/flattenStyle');
 const infoLog = require('../Utilities/infoLog');
 const invariant = require('invariant');
-const warning = require('fbjs/lib/warning');
 
 const {computeWindowedRenderLimits} = require('./VirtualizeUtils');
 
@@ -850,11 +849,12 @@ class VirtualizedList extends React.PureComponent<Props, State> {
   render(): React.Node {
     if (__DEV__) {
       const flatStyles = flattenStyle(this.props.contentContainerStyle);
-      warning(
-        flatStyles == null || flatStyles.flexWrap !== 'wrap',
-        '`flexWrap: `wrap`` is not supported with the `VirtualizedList` components.' +
-          'Consider using `numColumns` with `FlatList` instead.',
-      );
+      if (flatStyles != null && flatStyles.flexWrap === 'wrap') {
+        console.warn(
+          '`flexWrap: `wrap`` is not supported with the `VirtualizedList` components.' +
+            'Consider using `numColumns` with `FlatList` instead.',
+        );
+      }
     }
     const {
       ListEmptyComponent,

Libraries/Network/XMLHttpRequest.js

@@ -17,7 +17,6 @@ const RCTNetworking = require('./RCTNetworking');
 
 const base64 = require('base64-js');
 const invariant = require('invariant');
-const warning = require('fbjs/lib/warning');
 
 const DEBUG_NETWORK_SEND_DELAY: false = false; // Set to a number of milliseconds when debugging
 
@@ -184,8 +183,7 @@ class XMLHttpRequest extends (EventTarget(...XHR_EVENTS): any) {
       );
     }
     if (!SUPPORTED_RESPONSE_TYPES.hasOwnProperty(responseType)) {
-      warning(
-        false,
+      console.warn(
         `The provided value '${responseType}' is not a valid 'responseType'.`,
       );
       return;

Libraries/Network/__tests__/XMLHttpRequest-test.js

@@ -95,16 +95,16 @@ describe('XMLHttpRequest', function() {
   it('should expose responseType correctly', function() {
     expect(xhr.responseType).toBe('');
 
-    jest.spyOn(console, 'error').mockImplementationOnce(() => {});
+    jest.spyOn(console, 'warn').mockReturnValue(undefined);
 
     // Setting responseType to an unsupported value has no effect.
     xhr.responseType = 'arrayblobbuffertextfile';
     expect(xhr.responseType).toBe('');
 
-    expect(console.error).toBeCalledWith(
-      "Warning: The provided value 'arrayblobbuffertextfile' is not a valid 'responseType'.",
+    expect(console.warn).toBeCalledWith(
+      "The provided value 'arrayblobbuffertextfile' is not a valid 'responseType'.",
     );
-    console.error.mockRestore();
+    console.warn.mockRestore();
 
     xhr.responseType = 'arraybuffer';
     expect(xhr.responseType).toBe('arraybuffer');

Libraries/ReactNative/getNativeComponentAttributes.js

@@ -21,7 +21,6 @@ const processColor = require('../StyleSheet/processColor');
 const processColorArray = require('../StyleSheet/processColorArray');
 const resolveAssetSource = require('../Image/resolveAssetSource');
 const sizesDiffer = require('../Utilities/differ/sizesDiffer');
-const warning = require('fbjs/lib/warning');
 
 function getNativeComponentAttributes(uiViewClassName: string): any {
   const viewConfig = UIManager.getViewManagerConfig(uiViewClassName);
@@ -39,7 +38,7 @@ function getNativeComponentAttributes(uiViewClassName: string): any {
   while (baseModuleName) {
     const baseModule = UIManager.getViewManagerConfig(baseModuleName);
     if (!baseModule) {
-      warning(false, 'Base module "%s" does not exist', baseModuleName);
+      console.warn('Base module "%s" does not exist', baseModuleName);
       baseModuleName = null;
     } else {
       bubblingEventTypes = {

Libraries/Utilities/__tests__/warnOnce-test.js

@@ -14,14 +14,14 @@ describe('warnOnce', () => {
   const warnOnce = require('../warnOnce');
 
   it('logs warning messages to the console exactly once', () => {
-    console.error = jest.fn();
+    jest.spyOn(console, 'warn').mockReturnValue(undefined);
 
     warnOnce('test-message', 'This is a log message');
     warnOnce('test-message', 'This is a second log message');
 
-    expect(console.error).toHaveBeenCalledWith(
-      'Warning: This is a log message',
-    );
-    expect(console.error).toHaveBeenCalledTimes(1);
+    expect(console.warn).toHaveBeenCalledWith('This is a log message');
+    expect(console.warn).toHaveBeenCalledTimes(1);
+
+    console.warn.mockRestore();
   });
 });

Libraries/Utilities/warnOnce.js

@@ -10,8 +10,6 @@
 
 'use strict';
 
-const warning = require('fbjs/lib/warning');
-
 const warnedKeys: {[string]: boolean, ...} = {};
 
 /**
@@ -26,7 +24,7 @@ function warnOnce(key: string, message: string) {
     return;
   }
 
-  warning(false, message);
+  console.warn(message);
 
   warnedKeys[key] = true;
 }

packages/rn-tester/RNTesterIntegrationTests/RCTLoggingTests.m

@@ -83,7 +83,7 @@ - (void)testLogging
 
   XCTAssertEqual(_lastLogLevel, RCTLogLevelWarning);
   XCTAssertEqual(_lastLogSource, RCTLogSourceJavaScript);
-  XCTAssertEqualObjects(_lastLogMessage, @"Warning: Generating warning");
+  XCTAssertEqualObjects(_lastLogMessage, @"Generating warning");
 
   [_bridge enqueueJSCall:@"LoggingTestModule.invariant" args:@[@"Invariant failed"]];
   dispatch_semaphore_wait(_logSem, DISPATCH_TIME_FOREVER);