Delete hasteImpl, providesModuleNodeModules, and modulePathNameMapper (…

…facebook#24811)

Summary:
**Depends on facebook#25100

This commit depends on having migrated all of RN away from Haste. With 100% standard path-based requires, the key foundation is set and we no longer need `hasteImpl` and related settings in the Jest configuration.

This commit deletes the `hasteImpl` file and setting as well as `providesModuleNodeModules` and `modulePathNameMapper`, removing most of the dependency graph overriding performed by Jest.

## Changelog

[General] [Changed] - Delete hasteImpl, providesModuleNodeModules, and modulePathNameMapper from Jest config
Pull Request resolved: facebook#24811

Differential Revision: D15659274

Pulled By: cpojer

fbshipit-source-id: 8a4a3b97ddf7e38fbe62c6d3cc9c98248bfca343

jest-preset.js

@@ -9,19 +9,11 @@
 
 'use strict';
 
-const dir = __dirname;
-
 module.exports = {
   haste: {
     defaultPlatform: 'ios',
     platforms: ['android', 'ios', 'native'],
-    hasteImplModulePath: require.resolve('./jest/hasteImpl.js'),
-    providesModuleNodeModules: ['react-native'],
-  },
-  moduleNameMapper: {
-    '^React$': require.resolve('react'),
   },
-  modulePathIgnorePatterns: [`${dir}/Libraries/react-native/`],
   transform: {
     '^.+\\.(js|ts|tsx)$': 'babel-jest',
     '^.+\\.(bmp|gif|jpg|jpeg|mp4|png|psd|svg|webp)$': require.resolve(

jest.config.js

@@ -17,9 +17,6 @@ module.exports = {
       './jest/setup.js',
     ],
     'timers': 'fake',
-    'moduleNameMapper': {
-      '^React$': '<rootDir>/Libraries/react-native/React.js',
-    },
     'testRegex': '/__tests__/.*-test\\.js$',
     'testPathIgnorePatterns': [
       '/node_modules/',
@@ -29,46 +26,11 @@ module.exports = {
     ],
     'haste': {
       'defaultPlatform': 'ios',
-      'hasteImplModulePath': '<rootDir>/jest/hasteImpl.js',
-      'providesModuleNodeModules': [
-        'react-native',
-      ],
       'platforms': [
         'ios',
         'android',
       ],
     },
-    'modulePathIgnorePatterns': [
-      '/node_modules/(?!react|fbjs|react-native|react-transform-hmr|core-js|promise)/',
-      'node_modules/react/node_modules/fbjs/',
-      'node_modules/react/lib/ReactDOM.js',
-      'node_modules/fbjs/lib/Map.js',
-      'node_modules/fbjs/lib/Promise.js',
-      'node_modules/fbjs/lib/fetch.js',
-      'node_modules/fbjs/lib/ErrorUtils.js',
-      'node_modules/fbjs/lib/URI.js',
-      'node_modules/fbjs/lib/Deferred.js',
-      'node_modules/fbjs/lib/PromiseMap.js',
-      'node_modules/fbjs/lib/UserAgent.js',
-      'node_modules/fbjs/lib/areEqual.js',
-      'node_modules/fbjs/lib/base62.js',
-      'node_modules/fbjs/lib/crc32.js',
-      'node_modules/fbjs/lib/everyObject.js',
-      'node_modules/fbjs/lib/fetchWithRetries.js',
-      'node_modules/fbjs/lib/filterObject.js',
-      'node_modules/fbjs/lib/flattenArray.js',
-      'node_modules/fbjs/lib/forEachObject.js',
-      'node_modules/fbjs/lib/isEmpty.js',
-      'node_modules/fbjs/lib/removeFromArray.js',
-      'node_modules/fbjs/lib/resolveImmediate.js',
-      'node_modules/fbjs/lib/someObject.js',
-      'node_modules/fbjs/lib/sprintf.js',
-      'node_modules/fbjs/lib/xhrSimpleDataSerializer.js',
-      'node_modules/jest-cli',
-      'node_modules/react/dist',
-      'node_modules/fbjs/.*/__mocks__/',
-      'node_modules/fbjs/node_modules/',
-    ],
     'unmockedModulePathPatterns': [
       'node_modules/react/',
       'Libraries/Renderer',

jest/hasteImpl.js

@@ -5,93 +5,12 @@
  * LICENSE file in the root directory of this source tree.
  *
  * @format
- * @flow
  */
 
 'use strict';
 
-const path = require('path');
-const cli = require('@react-native-community/cli');
-
-// Use duck-typing because of Facebook-internal infra that doesn't have the cli package.
-const {haste} = (cli.loadConfig && cli.loadConfig()) || {
-  haste: {
-    providesModuleNodeModules: [],
-    platforms: ['ios', 'android'],
-  },
-};
-
-// Detect out-of-tree platforms and add them to the whitelists
-const pluginRoots /*: Array<string> */ = haste.providesModuleNodeModules.map(
-  name => path.resolve(__dirname, '../../', name) + path.sep,
-);
-
-const pluginNameReducers /*: Array<[RegExp, string]> */ = haste.platforms.map(
-  name => [new RegExp(`^(.*)\\.(${name})$`), '$1'],
-);
-
-const ROOTS = [path.resolve(__dirname, '..') + path.sep, ...pluginRoots];
-
-const BLACKLISTED_PATTERNS /*: Array<RegExp> */ = [
-  /.*[\\\/]__(mocks|tests)__[\\\/].*/,
-  /^Libraries[\\\/]Animated[\\\/]src[\\\/]polyfills[\\\/].*/,
-  /^Libraries[\\\/]Renderer[\\\/]fb[\\\/].*/,
-  /DerivedData[\\\/].*/,
-];
-
-const WHITELISTED_PREFIXES /*: Array<string> */ = [
-  'IntegrationTests',
-  'Libraries',
-  'ReactAndroid',
-  'RNTester',
-];
-
-const NAME_REDUCERS /*: Array<[RegExp, string]> */ = [
-  // extract basename
-  [/^(?:.*[\\\/])?([a-zA-Z0-9$_.-]+)$/, '$1'],
-  // strip .js/.js.flow suffix
-  [/^(.*)\.js(\.flow)?$/, '$1'],
-  // strip native suffix
-  [/^(.*)\.(native)$/, '$1'],
-  // strip plugin platform suffixes
-  ...pluginNameReducers,
-];
-
-function isHastePath(filePath /*: string */) /*: boolean */ {
-  if (!filePath.endsWith('.js') && !filePath.endsWith('.js.flow')) {
-    return false;
-  }
-
-  const root = ROOTS.find(r => filePath.startsWith(r));
-  if (!root) {
-    return false;
-  }
-
-  filePath = filePath.substr(root.length);
-  if (BLACKLISTED_PATTERNS.some(pattern => pattern.test(filePath))) {
-    return false;
-  }
-  return WHITELISTED_PREFIXES.some(prefix => filePath.startsWith(prefix));
-}
-
 module.exports = {
-  /*
-   * @return {string|void} hasteName for module at filePath; or undefined if
-   *                       filePath is not a haste module
-   */
-  getHasteName(
-    filePath /*: string */,
-    sourceCode /*: ?string */,
-  ) /*: string | void */ {
-    if (!isHastePath(filePath)) {
-      return undefined;
-    }
-
-    const hasteName = NAME_REDUCERS.reduce(
-      (name, [pattern, replacement]) => name.replace(pattern, replacement),
-      filePath,
-    );
-
-    return hasteName;
+  getHasteName() {
+    return undefined;
   },
 };