chore: convert jest-runtime to ESM

CHANGELOG.md

@@ -14,6 +14,8 @@
 
 ### Chore & Maintenance
 
+- `[jest-runtime]` [**BREAKING**] Convert to ESM ([#10325](https://github.com/facebook/jest/pull/10325))
+
 ### Performance
 
 ## 26.4.2

packages/jest-circus/src/legacy-code-todo-rewrite/jestAdapter.ts

@@ -10,7 +10,7 @@ import type {Config} from '@jest/types';
 import type {JestEnvironment} from '@jest/environment';
 import type {TestResult} from '@jest/test-result';
 import type {TestFileEvent} from 'jest-runner';
-import type {RuntimeType as Runtime} from 'jest-runtime';
+import type Runtime from 'jest-runtime';
 import type {SnapshotStateType} from 'jest-snapshot';
 import {deepCyclicCopy} from 'jest-util';
 

packages/jest-core/src/__tests__/SearchSource.test.ts

@@ -7,7 +7,7 @@
  */
 
 import * as path from 'path';
-import Runtime = require('jest-runtime');
+import Runtime from 'jest-runtime';
 import {normalize} from 'jest-config';
 import {Test} from 'jest-runner';
 import type {Config} from '@jest/types';

packages/jest-core/src/__tests__/watch-file-changes.test.ts

@@ -10,7 +10,7 @@ import * as path from 'path';
 import {tmpdir} from 'os';
 import * as fs from 'graceful-fs';
 import {JestHook} from 'jest-watcher';
-import Runtime = require('jest-runtime');
+import Runtime from 'jest-runtime';
 import {normalize} from 'jest-config';
 import HasteMap = require('jest-haste-map');
 import rimraf = require('rimraf');

packages/jest-core/src/cli/index.ts

@@ -10,7 +10,7 @@ import type {AggregatedResult} from '@jest/test-result';
 import {CustomConsole} from '@jest/console';
 import {createDirectory, preRunMessage} from 'jest-util';
 import {readConfigs} from 'jest-config';
-import Runtime = require('jest-runtime');
+import Runtime, {Context} from 'jest-runtime';
 import type {ChangedFilesPromise} from 'jest-changed-files';
 import HasteMap = require('jest-haste-map');
 import chalk = require('chalk');
@@ -218,7 +218,7 @@ const _run10000 = async (
 };
 
 const runWatch = async (
-  contexts: Array<Runtime.Context>,
+  contexts: Array<Context>,
   _configs: Array<Config.ProjectConfig>,
   hasDeprecationWarnings: boolean,
   globalConfig: Config.GlobalConfig,
@@ -256,7 +256,7 @@ const runWatch = async (
 
 const runWithoutWatch = async (
   globalConfig: Config.GlobalConfig,
-  contexts: Array<Runtime.Context>,
+  contexts: Array<Context>,
   outputStream: NodeJS.WriteStream,
   onComplete: OnCompleteCallback,
   changedFilesPromise?: ChangedFilesPromise,

packages/jest-core/src/lib/create_context.ts

@@ -6,13 +6,13 @@
  */
 
 import type {Config} from '@jest/types';
-import Runtime = require('jest-runtime');
+import Runtime, {Context} from 'jest-runtime';
 import type {HasteMapObject} from 'jest-haste-map';
 
 export default (
   config: Config.ProjectConfig,
   {hasteFS, moduleMap}: HasteMapObject,
-): Runtime.Context => ({
+): Context => ({
   config,
   hasteFS,
   moduleMap,

packages/jest-jasmine2/src/index.ts

@@ -10,7 +10,7 @@ import type {Config, Global} from '@jest/types';
 import type {AssertionResult, TestResult} from '@jest/test-result';
 import type {JestEnvironment} from '@jest/environment';
 import type {SnapshotStateType} from 'jest-snapshot';
-import type {RuntimeType as Runtime} from 'jest-runtime';
+import type Runtime from 'jest-runtime';
 
 import {getCallsite} from '@jest/source-map';
 import installEach from './each';

packages/jest-repl/src/cli/args.ts

@@ -7,7 +7,7 @@
  */
 
 import type {Options} from 'yargs';
-import Runtime = require('jest-runtime');
+import Runtime from 'jest-runtime';
 
 export const usage = 'Usage: $0 [--config=<pathToConfigFile>]';
 

packages/jest-repl/src/cli/index.ts

@@ -7,7 +7,7 @@
  *
  */
 
-import Runtime = require('jest-runtime');
+import Runtime from 'jest-runtime';
 import yargs = require('yargs');
 import {validateCLIOptions} from 'jest-validate';
 import {deprecationEntries} from 'jest-config';

packages/jest-resolve-dependencies/src/__tests__/dependency_resolver.test.ts

@@ -26,7 +26,7 @@ const filter = (path: Config.Path) =>
   Object.keys(cases).every(key => cases[key](path));
 
 beforeEach(() => {
-  Runtime = require('jest-runtime');
+  Runtime = require('jest-runtime').default;
   config = makeProjectConfig({
     cacheDirectory: path.resolve(tmpdir(), 'jest-resolve-dependencies-test'),
     moduleDirectories: ['node_modules'],

packages/jest-runner/src/testWorker.ts

@@ -11,7 +11,7 @@ import type {SerializableError, TestResult} from '@jest/test-result';
 import HasteMap = require('jest-haste-map');
 import exit = require('exit');
 import {separateMessageFromStack} from 'jest-message-util';
-import Runtime = require('jest-runtime');
+import Runtime from 'jest-runtime';
 import type {ResolverType} from 'jest-resolve';
 import {messageParent} from 'jest-worker';
 import type {

packages/jest-runner/src/types.ts

@@ -15,7 +15,7 @@ import type {
 import type {JestEnvironment} from '@jest/environment';
 import type {FS as HasteFS, ModuleMap} from 'jest-haste-map';
 import type {ResolverType} from 'jest-resolve';
-import type {RuntimeType} from 'jest-runtime';
+import type RuntimeType from 'jest-runtime';
 
 export type ErrorWithCode = Error & {code?: string};
 export type Test = {

packages/jest-runtime/src/cli/index.ts

@@ -66,7 +66,7 @@ export async function run(
     automock: false,
   };
 
-  const Runtime: typeof import('..') = require('..');
+  const {default: Runtime} = await import('..');
 
   try {
     const hasteMap = await Runtime.createContext(config, {

packages/jest-runtime/src/index.ts

@@ -48,7 +48,7 @@ import HasteMap = require('jest-haste-map');
 import Resolver = require('jest-resolve');
 import Snapshot = require('jest-snapshot');
 import stripBOM = require('strip-bom');
-import type {Context as JestContext} from './types';
+import type {Context} from './types';
 import {
   createOutsideJestVmPath,
   decodePossibleOutsideJestVmPath,
@@ -57,6 +57,8 @@ import {
 import {options as cliOptions} from './cli/args';
 import {run as cliRun} from './cli';
 
+export type {Context} from './types';
+
 interface JestGlobals extends Global.TestFrameworkGlobals {
   expect: typeof JestGlobals.expect;
 }
@@ -108,12 +110,6 @@ const fromEntries: typeof Object.fromEntries =
     }, {});
   };
 
-namespace Runtime {
-  export type Context = JestContext;
-  // ditch this export when moving to esm - for now we need it for to avoid faulty type elision
-  export type RuntimeType = Runtime;
-}
-
 const testTimeoutSymbol = Symbol.for('TEST_TIMEOUT_SYMBOL');
 const retryTimesSymbol = Symbol.for('RETRY_TIMES');
 
@@ -140,7 +136,7 @@ type RunScriptEvalResult = {[EVAL_RESULT_VARIABLE]: ModuleWrapper};
 
 const runtimeSupportsVmModules = typeof SyntheticModule === 'function';
 
-class Runtime {
+export default class Runtime {
   private _cacheFS: StringMap;
   private _config: Config.ProjectConfig;
   private _coverageOptions: ShouldInstrumentOptions;
@@ -259,7 +255,7 @@ class Runtime {
       watch?: boolean;
       watchman: boolean;
     },
-  ): Promise<JestContext> {
+  ): Promise<Context> {
     createDirectory(config.cacheDirectory);
     const instance = Runtime.createHasteMap(config, {
       console: options.console,
@@ -1737,5 +1733,3 @@ function invariant(condition: unknown, message?: string): asserts condition {
 function notEmpty<T>(value: T | null | undefined): value is T {
   return value !== null && value !== undefined;
 }
-
-export = Runtime;