RN: Eliminate Jest Log Spew

Summary:
Eliminates all of the console logs that appear when successfully running Jest tests for React Native.

Changelog:
[Internal]

Reviewed By: lunaleaps

Differential Revision: D32304619

fbshipit-source-id: 8bc8ef9337ae6af588238cec7cfb874ac6067340

Libraries/Components/TextInput/__tests__/TextInput-test.js

@@ -102,15 +102,10 @@ describe('TextInput tests', () => {
     TextInput.State.focusTextInput(textInputRef.current);
     expect(textInputRef.current.isFocused()).toBe(true);
     expect(TextInput.State.currentlyFocusedInput()).toBe(textInputRef.current);
-    // This function is currently deprecated and will be removed in the future
-    expect(TextInput.State.currentlyFocusedField()).toBe(
-      ReactNative.findNodeHandle(textInputRef.current),
-    );
+
     TextInput.State.blurTextInput(textInputRef.current);
     expect(textInputRef.current.isFocused()).toBe(false);
     expect(TextInput.State.currentlyFocusedInput()).toBe(null);
-    // This function is currently deprecated and will be removed in the future
-    expect(TextInput.State.currentlyFocusedField()).toBe(null);
   });
 
   it('should unfocus when other TextInput is focused', () => {
@@ -144,24 +139,17 @@ describe('TextInput tests', () => {
     expect(textInputRe1.current.isFocused()).toBe(false);
     expect(textInputRe2.current.isFocused()).toBe(false);
 
-    const inputTag1 = ReactNative.findNodeHandle(textInputRe1.current);
-    const inputTag2 = ReactNative.findNodeHandle(textInputRe2.current);
-
     TextInput.State.focusTextInput(textInputRe1.current);
 
     expect(textInputRe1.current.isFocused()).toBe(true);
     expect(textInputRe2.current.isFocused()).toBe(false);
     expect(TextInput.State.currentlyFocusedInput()).toBe(textInputRe1.current);
-    // This function is currently deprecated and will be removed in the future
-    expect(TextInput.State.currentlyFocusedField()).toBe(inputTag1);
 
     TextInput.State.focusTextInput(textInputRe2.current);
 
     expect(textInputRe1.current.isFocused()).toBe(false);
     expect(textInputRe2.current.isFocused()).toBe(true);
     expect(TextInput.State.currentlyFocusedInput()).toBe(textInputRe2.current);
-    // This function is currently deprecated and will be removed in the future
-    expect(TextInput.State.currentlyFocusedField()).toBe(inputTag2);
   });
 
   it('should render as expected', () => {

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

@@ -28,7 +28,7 @@ const JSTimers = require('../JSTimers');
 
 describe('JSTimers', function () {
   beforeEach(function () {
-    jest.spyOn(console, 'warn');
+    jest.spyOn(console, 'warn').mockReturnValue(undefined);
     global.setTimeout = JSTimers.setTimeout;
   });
 

Libraries/Image/__tests__/AssetUtils-test.js

@@ -17,7 +17,7 @@ describe('AssetUtils', () => {
   });
 
   it('should return empty string and warn once if no cacheBreaker set (DEV)', () => {
-    const mockWarn = jest.spyOn(console, 'warn');
+    const mockWarn = jest.spyOn(console, 'warn').mockReturnValue(undefined);
     global.__DEV__ = true;
     expect(getUrlCacheBreaker()).toEqual('');
     expect(getUrlCacheBreaker()).toEqual('');

Libraries/Lists/__tests__/VirtualizedList-test.js

@@ -362,7 +362,7 @@ describe('VirtualizedList', () => {
     const layout = {width: 300, height: 600};
     let data = Array(20)
       .fill()
-      .map((_, key) => ({key: String(key)}));
+      .map((_, index) => ({key: `key-${index}`}));
     const onEndReached = jest.fn();
     const props = {
       data,

Libraries/LogBox/__tests__/LogBox-test.js

@@ -30,20 +30,20 @@ function mockFilterResult(returnValues) {
 }
 
 describe('LogBox', () => {
-  const {error, warn} = console;
-  let consoleError;
-  let consoleWarn;
+  const {error, log, warn} = console;
 
   beforeEach(() => {
     jest.resetModules();
-    console.error = consoleError = jest.fn();
-    console.warn = consoleWarn = jest.fn();
+    console.error = jest.fn();
+    console.log = jest.fn();
+    console.warn = jest.fn();
     console.disableYellowBox = false;
   });
 
   afterEach(() => {
     LogBox.uninstall();
     console.error = error;
+    console.log = log;
     console.warn = warn;
   });
 
@@ -329,6 +329,8 @@ describe('LogBox', () => {
   });
 
   it('preserves decorations of console.error after installing/uninstalling', () => {
+    const consoleError = console.error;
+
     LogBox.install();
 
     const originalConsoleError = console.error;
@@ -356,6 +358,8 @@ describe('LogBox', () => {
   });
 
   it('preserves decorations of console.warn after installing/uninstalling', () => {
+    const consoleWarn = console.warn;
+
     LogBox.install();
 
     const originalConsoleWarn = console.warn;

jest/mockNativeComponent.js

@@ -11,8 +11,12 @@
 
 const React = require('react');
 
+let nativeTag = 1;
+
 module.exports = viewName => {
   const Component = class extends React.Component {
+    _nativeTag = nativeTag++;
+
     render() {
       return React.createElement(viewName, this.props, this.props.children);
     }