Normalize config and remove unecessary checks

CHANGELOG.md

@@ -14,6 +14,7 @@
 - `[jest-changed-files]` Improve default file selection for Mercurial repos ([#7880](https://github.com/facebook/jest/pull/7880))
 - `[jest-validate]` Fix validating async functions ([#7894](https://github.com/facebook/jest/issues/7894))
 - `[jest-circus]` Fix bug with test.only ([#7888](https://github.com/facebook/jest/pull/7888))
+- `[jest-transform]` Normalize config and remove unecessary checks, convert `TestUtils.js` to TypeScript ([#7801](https://github.com/facebook/jest/pull/7801)
 
 ### Chore & Maintenance
 

TestUtils.js → TestUtils.ts

@@ -3,15 +3,12 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- * @flow
  */
 
-'use strict';
-
-import type {GlobalConfig, ProjectConfig} from 'types/Config';
+// eslint-disable-next-line import/no-extraneous-dependencies
+import {Config} from '@jest/types';
 
-const DEFAULT_GLOBAL_CONFIG: GlobalConfig = {
+const DEFAULT_GLOBAL_CONFIG: Config.GlobalConfig = {
   bail: 0,
   changedFilesWithAncestor: false,
   changedSince: '',
@@ -67,7 +64,7 @@ const DEFAULT_GLOBAL_CONFIG: GlobalConfig = {
   watchman: false,
 };
 
-const DEFAULT_PROJECT_CONFIG: ProjectConfig = {
+const DEFAULT_PROJECT_CONFIG: Config.ProjectConfig = {
   automock: false,
   browser: false,
   cache: false,
@@ -124,7 +121,9 @@ const DEFAULT_PROJECT_CONFIG: ProjectConfig = {
   watchPathIgnorePatterns: [],
 };
 
-export const makeGlobalConfig = (overrides: Object = {}): GlobalConfig => {
+export const makeGlobalConfig = (
+  overrides: Partial<Config.GlobalConfig> = {},
+): Config.GlobalConfig => {
   const overridesKeys = new Set(Object.keys(overrides));
   Object.keys(DEFAULT_GLOBAL_CONFIG).forEach(key => overridesKeys.delete(key));
 
@@ -138,7 +137,9 @@ export const makeGlobalConfig = (overrides: Object = {}): GlobalConfig => {
   return {...DEFAULT_GLOBAL_CONFIG, ...overrides};
 };
 
-export const makeProjectConfig = (overrides: Object = {}): ProjectConfig => {
+export const makeProjectConfig = (
+  overrides: Partial<Config.ProjectConfig> = {},
+): Config.ProjectConfig => {
   const overridesKeys = new Set(Object.keys(overrides));
   Object.keys(DEFAULT_PROJECT_CONFIG).forEach(key => overridesKeys.delete(key));
 
@@ -149,5 +150,5 @@ export const makeProjectConfig = (overrides: Object = {}): ProjectConfig => {
     `);
   }
 
-  return {...DEFAULT_GLOBAL_CONFIG, ...overrides};
+  return {...DEFAULT_PROJECT_CONFIG, ...overrides};
 };

packages/jest-core/src/lib/__tests__/is_valid_path.test.js

@@ -9,6 +9,7 @@
 
 import isValidPath from '../is_valid_path';
 import path from 'path';
+//$FlowFixMe: Converted to TS
 import {makeGlobalConfig} from '../../../../../TestUtils';
 
 const rootDir = path.resolve(path.sep, 'root');

packages/jest-reporters/src/__tests__/generateEmptyCoverage.test.js

@@ -13,6 +13,7 @@ import generateEmptyCoverage from '../generateEmptyCoverage';
 
 import path from 'path';
 import os from 'os';
+//$FlowFixMe: Converted to TS
 import {makeGlobalConfig, makeProjectConfig} from '../../../../TestUtils';
 
 jest.mock('@jest/transform', () => ({

packages/jest-runtime/src/__tests__/instrumentation.test.js

@@ -12,6 +12,7 @@ import vm from 'vm';
 import path from 'path';
 import os from 'os';
 import {ScriptTransformer} from '@jest/transform';
+import {makeProjectConfig} from '../../../../TestUtils';
 
 jest.mock('vm');
 
@@ -21,11 +22,11 @@ const FILE_PATH_TO_INSTRUMENT = path.resolve(
 );
 
 it('instruments files', () => {
-  const config = {
+  const config = makeProjectConfig({
     cache: false,
     cacheDirectory: os.tmpdir(),
     rootDir: '/',
-  };
+  });
   const instrumented = new ScriptTransformer(config).transform(
     FILE_PATH_TO_INSTRUMENT,
     {collectCoverage: true},

packages/jest-transform/src/__tests__/__snapshots__/script_transformer.test.js.snap

@@ -3,10 +3,60 @@
 exports[`ScriptTransformer passes expected transform options to getCacheKey 1`] = `
 Object {
   "config": Object {
+    "automock": false,
+    "browser": false,
     "cache": true,
     "cacheDirectory": "/cache/",
+    "clearMocks": false,
+    "coveragePathIgnorePatterns": Array [],
+    "cwd": "/test_root_dir/",
+    "detectLeaks": false,
+    "detectOpenHandles": false,
+    "displayName": undefined,
+    "errorOnDeprecated": false,
+    "extraGlobals": Array [],
+    "filter": null,
+    "forceCoverageMatch": Array [],
+    "globalSetup": null,
+    "globalTeardown": null,
+    "globals": Object {},
+    "haste": Object {
+      "providesModuleNodeModules": Array [],
+    },
+    "moduleDirectories": Array [],
+    "moduleFileExtensions": Array [
+      "js",
+    ],
+    "moduleLoader": "/test_module_loader_path",
+    "moduleNameMapper": Array [],
+    "modulePathIgnorePatterns": Array [],
+    "modulePaths": Array [],
     "name": "test",
+    "prettierPath": "prettier",
+    "resetMocks": false,
+    "resetModules": false,
+    "resolver": null,
+    "restoreMocks": false,
     "rootDir": "/",
+    "roots": Array [],
+    "runner": "jest-runner",
+    "setupFiles": Array [],
+    "setupFilesAfterEnv": Array [],
+    "skipFilter": false,
+    "skipNodeResolution": false,
+    "snapshotResolver": null,
+    "snapshotSerializers": Array [],
+    "testEnvironment": "node",
+    "testEnvironmentOptions": Object {},
+    "testLocationInResults": false,
+    "testMatch": Array [],
+    "testPathIgnorePatterns": Array [],
+    "testRegex": Array [
+      "\\\\.test\\\\.js$",
+    ],
+    "testRunner": "jest-jasmine2",
+    "testURL": "",
+    "timers": "real",
     "transform": Array [
       Array [
         "^.+\\\\.js$",
@@ -16,6 +66,8 @@ Object {
     "transformIgnorePatterns": Array [
       "/node_modules/",
     ],
+    "unmockedModulePathPatterns": null,
+    "watchPathIgnorePatterns": Array [],
   },
   "instrument": true,
   "rootDir": "/",
@@ -172,7 +224,7 @@ exports[`ScriptTransformer uses multiple preprocessors 1`] = `
           const TRANSFORMED = {
             filename: '/fruits/banana.js',
             script: 'module.exports = \\"banana\\";',
-            config: '{\\"cache\\":true,\\"cacheDirectory\\":\\"/cache/\\",\\"name\\":\\"test\\",\\"rootDir\\":\\"/\\",\\"transformIgnorePatterns\\":[\\"/node_modules/\\"],\\"transform\\":[[\\"^.+\\\\\\\\.js$\\",\\"test_preprocessor\\"],[\\"^.+\\\\\\\\.css$\\",\\"css-preprocessor\\"]]}',
+            config: '{\\"automock\\":false,\\"browser\\":false,\\"cache\\":true,\\"cacheDirectory\\":\\"/cache/\\",\\"clearMocks\\":false,\\"coveragePathIgnorePatterns\\":[],\\"cwd\\":\\"/test_root_dir/\\",\\"detectLeaks\\":false,\\"detectOpenHandles\\":false,\\"errorOnDeprecated\\":false,\\"extraGlobals\\":[],\\"filter\\":null,\\"forceCoverageMatch\\":[],\\"globalSetup\\":null,\\"globalTeardown\\":null,\\"globals\\":{},\\"haste\\":{\\"providesModuleNodeModules\\":[]},\\"moduleDirectories\\":[],\\"moduleFileExtensions\\":[\\"js\\"],\\"moduleLoader\\":\\"/test_module_loader_path\\",\\"moduleNameMapper\\":[],\\"modulePathIgnorePatterns\\":[],\\"modulePaths\\":[],\\"name\\":\\"test\\",\\"prettierPath\\":\\"prettier\\",\\"resetMocks\\":false,\\"resetModules\\":false,\\"resolver\\":null,\\"restoreMocks\\":false,\\"rootDir\\":\\"/\\",\\"roots\\":[],\\"runner\\":\\"jest-runner\\",\\"setupFiles\\":[],\\"setupFilesAfterEnv\\":[],\\"skipFilter\\":false,\\"skipNodeResolution\\":false,\\"snapshotResolver\\":null,\\"snapshotSerializers\\":[],\\"testEnvironment\\":\\"node\\",\\"testEnvironmentOptions\\":{},\\"testLocationInResults\\":false,\\"testMatch\\":[],\\"testPathIgnorePatterns\\":[],\\"testRegex\\":[\\"\\\\\\\\.test\\\\\\\\.js$\\"],\\"testRunner\\":\\"jest-jasmine2\\",\\"testURL\\":\\"\\",\\"timers\\":\\"real\\",\\"transform\\":[[\\"^.+\\\\\\\\.js$\\",\\"test_preprocessor\\"],[\\"^.+\\\\\\\\.css$\\",\\"css-preprocessor\\"]],\\"transformIgnorePatterns\\":[\\"/node_modules/\\"],\\"unmockedModulePathPatterns\\":null,\\"watchPathIgnorePatterns\\":[]}',
           };
 
 }});"
@@ -198,7 +250,7 @@ exports[`ScriptTransformer uses the supplied preprocessor 1`] = `
           const TRANSFORMED = {
             filename: '/fruits/banana.js',
             script: 'module.exports = \\"banana\\";',
-            config: '{\\"cache\\":true,\\"cacheDirectory\\":\\"/cache/\\",\\"name\\":\\"test\\",\\"rootDir\\":\\"/\\",\\"transformIgnorePatterns\\":[\\"/node_modules/\\"],\\"transform\\":[[\\"^.+\\\\\\\\.js$\\",\\"test_preprocessor\\"]]}',
+            config: '{\\"automock\\":false,\\"browser\\":false,\\"cache\\":true,\\"cacheDirectory\\":\\"/cache/\\",\\"clearMocks\\":false,\\"coveragePathIgnorePatterns\\":[],\\"cwd\\":\\"/test_root_dir/\\",\\"detectLeaks\\":false,\\"detectOpenHandles\\":false,\\"errorOnDeprecated\\":false,\\"extraGlobals\\":[],\\"filter\\":null,\\"forceCoverageMatch\\":[],\\"globalSetup\\":null,\\"globalTeardown\\":null,\\"globals\\":{},\\"haste\\":{\\"providesModuleNodeModules\\":[]},\\"moduleDirectories\\":[],\\"moduleFileExtensions\\":[\\"js\\"],\\"moduleLoader\\":\\"/test_module_loader_path\\",\\"moduleNameMapper\\":[],\\"modulePathIgnorePatterns\\":[],\\"modulePaths\\":[],\\"name\\":\\"test\\",\\"prettierPath\\":\\"prettier\\",\\"resetMocks\\":false,\\"resetModules\\":false,\\"resolver\\":null,\\"restoreMocks\\":false,\\"rootDir\\":\\"/\\",\\"roots\\":[],\\"runner\\":\\"jest-runner\\",\\"setupFiles\\":[],\\"setupFilesAfterEnv\\":[],\\"skipFilter\\":false,\\"skipNodeResolution\\":false,\\"snapshotResolver\\":null,\\"snapshotSerializers\\":[],\\"testEnvironment\\":\\"node\\",\\"testEnvironmentOptions\\":{},\\"testLocationInResults\\":false,\\"testMatch\\":[],\\"testPathIgnorePatterns\\":[],\\"testRegex\\":[\\"\\\\\\\\.test\\\\\\\\.js$\\"],\\"testRunner\\":\\"jest-jasmine2\\",\\"testURL\\":\\"\\",\\"timers\\":\\"real\\",\\"transform\\":[[\\"^.+\\\\\\\\.js$\\",\\"test_preprocessor\\"]],\\"transformIgnorePatterns\\":[\\"/node_modules/\\"],\\"unmockedModulePathPatterns\\":null,\\"watchPathIgnorePatterns\\":[]}',
           };
 
 }});"

packages/jest-transform/src/__tests__/script_transformer.test.js

@@ -8,6 +8,8 @@
 
 'use strict';
 
+import {makeProjectConfig} from '../../../../TestUtils';
+
 jest
   .mock('fs', () =>
     // Node 10.5.x compatibility
@@ -185,13 +187,13 @@ describe('ScriptTransformer', () => {
 
     writeFileAtomic = require('write-file-atomic');
 
-    config = {
+    config = makeProjectConfig({
       cache: true,
       cacheDirectory: '/cache/',
       name: 'test',
       rootDir: '/',
       transformIgnorePatterns: ['/node_modules/'],
-    };
+    });
 
     ScriptTransformer = require('../ScriptTransformer').default;
   };

packages/jest-transform/src/__tests__/should_instrument.test.js

@@ -7,22 +7,25 @@
  */
 
 import shouldInstrument from '../shouldInstrument';
-import {makeGlobalConfig} from '../../../../TestUtils';
+import {makeProjectConfig} from '../../../../TestUtils';
 
 describe('shouldInstrument', () => {
   const defaultFilename = 'source_file.test.js';
   const defaultOptions = {
     collectCoverage: true,
   };
-  const defaultConfig = makeGlobalConfig({rootDir: '/'});
-
+  const defaultConfig = makeProjectConfig({rootDir: '/'});
   describe('should return true', () => {
     const testShouldInstrument = (
       filename = defaultFilename,
-      options = defaultOptions,
-      config = defaultConfig,
+      options,
+      config,
     ) => {
-      const result = shouldInstrument(filename, options, config);
+      const result = shouldInstrument(
+        filename,
+        {...defaultOptions, ...options},
+        {...defaultConfig, ...config},
+      );
       expect(result).toBe(true);
     };
 
@@ -74,7 +77,6 @@ describe('shouldInstrument', () => {
       testShouldInstrument(
         'collect/only/from/here.js',
         {
-          collectCoverage: true,
           collectCoverageOnlyFrom: {'collect/only/from/here.js': true},
         },
         defaultConfig,
@@ -85,7 +87,6 @@ describe('shouldInstrument', () => {
       testShouldInstrument(
         'do/collect/coverage.js',
         {
-          collectCoverage: true,
           collectCoverageFrom: ['!**/dont/**/*.js', '**/do/**/*.js'],
         },
         defaultConfig,
@@ -95,14 +96,12 @@ describe('shouldInstrument', () => {
     it('should return true if the file is not in coveragePathIgnorePatterns', () => {
       testShouldInstrument('do/collect/coverage.js', defaultOptions, {
         coveragePathIgnorePatterns: ['dont'],
-        rootDir: '/',
       });
     });
 
     it('should return true if file is a testfile but forceCoverageMatch is set', () => {
       testShouldInstrument('do/collect/sum.coverage.test.js', defaultOptions, {
         forceCoverageMatch: ['**/*.(coverage).(test).js'],
-        rootDir: '/',
         testRegex: ['.*\\.(test)\\.(js)$'],
       });
     });
@@ -111,10 +110,14 @@ describe('shouldInstrument', () => {
   describe('should return false', () => {
     const testShouldInstrument = (
       filename = defaultFilename,
-      options = defaultOptions,
-      config = defaultConfig,
+      options,
+      config,
     ) => {
-      const result = shouldInstrument(filename, options, config);
+      const result = shouldInstrument(
+        filename,
+        {...defaultOptions, ...options},
+        {...defaultConfig, ...config},
+      );
       expect(result).toBe(false);
     };
 
@@ -164,7 +167,6 @@ describe('shouldInstrument', () => {
       testShouldInstrument(
         'source_file.js',
         {
-          collectCoverage: true,
           collectCoverageOnlyFrom: {'collect/only/from/here.js': true},
         },
         defaultConfig,
@@ -175,7 +177,6 @@ describe('shouldInstrument', () => {
       testShouldInstrument(
         'dont/collect/coverage.js',
         {
-          collectCoverage: true,
           collectCoverageFrom: ['!**/dont/**/*.js', '**/do/**/*.js'],
         },
         defaultConfig,
@@ -185,7 +186,6 @@ describe('shouldInstrument', () => {
     it('if the file is in coveragePathIgnorePatterns', () => {
       testShouldInstrument('dont/collect/coverage.js', defaultOptions, {
         coveragePathIgnorePatterns: ['dont'],
-        rootDir: '/',
       });
     });
 
@@ -201,27 +201,23 @@ describe('shouldInstrument', () => {
     it('if file is a globalSetup file', () => {
       testShouldInstrument('globalSetup.js', defaultOptions, {
         globalSetup: 'globalSetup.js',
-        rootDir: '/',
       });
     });
 
     it('if file is globalTeardown file', () => {
       testShouldInstrument('globalTeardown.js', defaultOptions, {
         globalTeardown: 'globalTeardown.js',
-        rootDir: '/',
       });
     });
 
     it('if file is in setupFiles', () => {
       testShouldInstrument('setupTest.js', defaultOptions, {
-        rootDir: '/',
         setupFiles: ['setupTest.js'],
       });
     });
 
     it('if file is in setupFilesAfterEnv', () => {
       testShouldInstrument('setupTest.js', defaultOptions, {
-        rootDir: '/',
         setupFilesAfterEnv: ['setupTest.js'],
       });
     });