Merge remote-tracking branch 'facebook/master' into 14839

* facebook/master:
  fix 1-indexed JEST_WORKER_ID (jestjs#8205)
  remove flow leftovers (jestjs#8213)

Author: Hoishin

.circleci/config.yml

@@ -26,7 +26,6 @@ jobs:
       - restore-cache: *restore-cache
       - run: yarn --no-progress --frozen-lockfile
       - save-cache: *save-cache
-      - run: echo server.max_workers=1 >> .flowconfig
       - run: yarn lint --format junit -o reports/junit/js-lint-results.xml && yarn lint-es5-build --format junit -o reports/junit/js-es5-lint-results.xml  && yarn lint:md:ci && yarn check-copyright-headers
       - store_test_results:
           path: reports/junit

CHANGELOG.md

@@ -20,6 +20,7 @@
 - `[pretty-format]` Print `BigInt` as a readable number instead of `{}` ([#8138](https://github.com/facebook/jest/pull/8138))
 - `[jest-core]` Fix ability to transform dependencies required from globalSetup script [#8143](https://github.com/facebook/jest/pull/8143)
 - `[@jest/reporters]` Fix Cannot read property converageData of null ([#8168](https://github.com/facebook/jest/pull/8168))
+- `[jest-worker]` `JEST_WORKER_ID` starts at 1 ([#8205](https://github.com/facebook/jest/pull/8205))
 - `[jest-resolve-dependencies]`: Move internal peer dependencies to dependencies ([#8215](https://github.com/facebook/jest/pull/8215))
 - `[jest-resolve]`: Move internal peer dependencies to dependencies ([#8215](https://github.com/facebook/jest/pull/8215))
 - `[jest-snapshot]`: Move internal peer dependencies to dependencies ([#8215](https://github.com/facebook/jest/pull/8215))

e2e/__tests__/__snapshots__/moduleNameMapper.test.ts.snap

@@ -30,6 +30,6 @@ FAIL __tests__/index.js
       12 | module.exports = () => 'test';
       13 | 
 
-      at createNoMappedModuleFoundError (../../packages/jest-resolve/build/index.js:474:17)
+      at createNoMappedModuleFoundError (../../packages/jest-resolve/build/index.js:473:17)
       at Object.require (index.js:10:1)
 `;

e2e/__tests__/__snapshots__/resolveNoFileExtensions.test.ts.snap

@@ -33,6 +33,6 @@ FAIL __tests__/test.js
         |                  ^
       4 | 
 
-      at Resolver.resolveModule (../../packages/jest-resolve/build/index.js:232:17)
+      at Resolver.resolveModule (../../packages/jest-resolve/build/index.js:231:17)
       at Object.require (index.js:3:18)
 `;

packages/expect/src/jasmineUtils.ts

@@ -50,7 +50,6 @@ function asymmetricMatch(a: any, b: any) {
   }
 
   if (asymmetricA) {
-    // $FlowFixMe – Flow sees `a` as a number
     return a.asymmetricMatch(b);
   }
 
@@ -103,7 +102,6 @@ function eq(
     case '[object String]':
       // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
       // equivalent to `new String("5")`.
-      // $FlowFixMe – Flow sees `a` as a number
       return a == String(b);
     case '[object Number]':
       return Object.is(Number(a), Number(b));
@@ -119,7 +117,6 @@ function eq(
         a.source == b.source &&
         a.global == b.global &&
         a.multiline == b.multiline &&
-        // $FlowFixMe – Flow sees `a` as a number
         a.ignoreCase == b.ignoreCase
       );
   }
@@ -210,7 +207,6 @@ function keys(
     }
     return keys.concat(
       (Object.getOwnPropertySymbols(o) as Array<any>).filter(
-        //$FlowFixMe Jest complains about nullability, but we know for sure that property 'symbol' does exist.
         symbol =>
           (Object.getOwnPropertyDescriptor(o, symbol) as any).enumerable,
       ),

packages/jest-cli/src/init/__tests__/init.test.js

@@ -25,17 +25,13 @@ const consoleLog = console.log;
 
 describe('init', () => {
   beforeEach(() => {
-    // $FlowFixMe mock console.log to reduce noise from the tests
     console.log = jest.fn();
-    // $FlowFixMe mock
     fs.writeFileSync = jest.fn();
   });
 
   afterEach(() => {
     jest.clearAllMocks();
-    // $FlowFixMe
     console.log = consoleLog;
-    // $FlowFixMe mock
     fs.writeFileSync = writeFileSync;
   });
 

packages/jest-config/src/setFromArgv.ts

@@ -14,7 +14,6 @@ export default function setFromArgv(
   options: Config.InitialOptions,
   argv: Config.Argv,
 ): Config.InitialOptions {
-  // $FlowFixMe: Seems like flow doesn't approve of string values
   const argvToOptions = Object.keys(argv)
     .filter(key => argv[key] !== undefined && specialArgs.indexOf(key) === -1)
     .reduce((options: {[key: string]: unknown}, key) => {

packages/jest-jasmine2/src/assertionErrorMessage.ts

@@ -47,7 +47,6 @@ const getOperatorName = (operator: string | null, stack: string) => {
 
 const operatorMessage = (operator: string | null) => {
   const niceOperatorName = getOperatorName(operator, '');
-  // $FlowFixMe: we default to the operator itself, so holes in the map doesn't matter
   const humanReadableOperator = humanReadableOperators[niceOperatorName];
 
   return typeof operator === 'string'

packages/jest-jasmine2/src/index.ts

@@ -127,7 +127,6 @@ async function jasmine2(
   if (globalConfig.errorOnDeprecated) {
     installErrorOnPrivate(environment.global);
   } else {
-    // $FlowFixMe Flow seems to be confused about accessors and tries to enforce having a `value` property.
     Object.defineProperty(jasmine, 'DEFAULT_TIMEOUT_INTERVAL', {
       configurable: true,
       enumerable: true,

packages/jest-jasmine2/src/setup_jest_globals.ts

@@ -105,7 +105,6 @@ export default ({
     expand,
     getBabelTraverse: () => require('@babel/traverse').default,
     getPrettier: () =>
-      // $FlowFixMe dynamic require
       config.prettierPath ? require(config.prettierPath) : null,
     updateSnapshot,
   });

packages/jest-resolve/src/index.ts

@@ -83,8 +83,7 @@ class Resolver {
     options: FindNodeModuleConfig,
   ): Config.Path | null {
     const resolver = options.resolver
-      ? /* $FlowFixMe */
-        require(options.resolver)
+      ? require(options.resolver)
       : defaultResolver;
     const paths = options.paths;
 

packages/jest-util/src/deepCyclicCopy.ts

@@ -54,7 +54,6 @@ function deepCyclicCopyObject<T>(
     ? Object.create(Object.getPrototypeOf(object))
     : {};
 
-  // $FlowFixMe: Object.getOwnPropertyDescriptors is polyfilled above.
   const descriptors = Object.getOwnPropertyDescriptors(object);
 
   cycles.set(object, newObject);

packages/jest-worker/src/WorkerPool.ts

@@ -18,7 +18,6 @@ import {
 
 const canUseWorkerThreads = () => {
   try {
-    // $FlowFixMe: Flow doesn't know about experimental APIs
     require('worker_threads');
     return true;
   } catch (_) {

packages/jest-worker/src/workers/ChildProcessWorker.ts

@@ -67,7 +67,7 @@ export default class ChildProcessWorker implements WorkerInterface {
       cwd: process.cwd(),
       env: {
         ...process.env,
-        JEST_WORKER_ID: String(this._options.workerId),
+        JEST_WORKER_ID: String(this._options.workerId + 1), // 0-indexed workerId, 1-indexed JEST_WORKER_ID
         ...forceColor,
       } as NodeJS.ProcessEnv,
       // Suppress --debug / --inspect flags while preserving others (like --harmony).

packages/jest-worker/src/workers/NodeThreadsWorker.ts

@@ -54,7 +54,7 @@ export default class ExperimentalWorker implements WorkerInterface {
         cwd: process.cwd(),
         env: {
           ...process.env,
-          JEST_WORKER_ID: String(this._options.workerId),
+          JEST_WORKER_ID: String(this._options.workerId + 1), // 0-indexed workerId, 1-indexed JEST_WORKER_ID
         } as NodeJS.ProcessEnv,
         // Suppress --debug / --inspect flags while preserving others (like --harmony).
         execArgv: process.execArgv.filter(v => !/^--(debug|inspect)/.test(v)),

packages/jest-worker/src/workers/__tests__/ChildProcessWorker.test.js

@@ -58,7 +58,7 @@ it('passes fork options down to child_process.fork, adding the defaults', () =>
       execPath: 'hello',
     },
     maxRetries: 3,
-    workerId: process.env.JEST_WORKER_ID,
+    workerId: process.env.JEST_WORKER_ID - 1,
     workerPath: '/tmp/foo/bar/baz.js',
   });
 
@@ -72,15 +72,15 @@ it('passes fork options down to child_process.fork, adding the defaults', () =>
   });
 });
 
-it('passes workerId to the child process and assign it to env.JEST_WORKER_ID', () => {
+it('passes workerId to the child process and assign it to 1-indexed env.JEST_WORKER_ID', () => {
   new Worker({
     forkOptions: {},
     maxRetries: 3,
     workerId: 2,
     workerPath: '/tmp/foo',
   });
 
-  expect(childProcess.fork.mock.calls[0][2].env.JEST_WORKER_ID).toEqual('2');
+  expect(childProcess.fork.mock.calls[0][2].env.JEST_WORKER_ID).toEqual('3');
 });
 
 it('initializes the child process with the given workerPath', () => {

packages/jest-worker/src/workers/__tests__/NodeThreadsWorker.test.js

@@ -63,7 +63,7 @@ it('passes fork options down to child_process.fork, adding the defaults', () =>
       execPath: 'hello',
     },
     maxRetries: 3,
-    workerId: process.env.JEST_WORKER_ID,
+    workerId: process.env.JEST_WORKER_ID - 1,
     workerPath: '/tmp/foo/bar/baz.js',
   });
 
@@ -91,7 +91,7 @@ it('passes workerId to the child process and assign it to env.JEST_WORKER_ID', (
   });
 
   expect(childProcess.mock.calls[0][1].workerData.env.JEST_WORKER_ID).toEqual(
-    '2',
+    '3',
   );
 });
 

packages/jest-worker/src/workers/processChild.ts

@@ -88,7 +88,6 @@ function reportError(error: Error, type: PARENT_MESSAGE_ERROR) {
     error.constructor && error.constructor.name,
     error.message,
     error.stack,
-    // $FlowFixMe: this is safe to just inherit from Object.
     typeof error === 'object' ? {...error} : error,
   ]);
 }