fix(circus): make sure to install globals before emitting setup event

CHANGELOG.md

@@ -4,7 +4,8 @@
 
 ### Fixes
 
-- `[jest-mock]` Fix typings for `mockResolvedValue`, `mockResolvedValueOnce`, `mockRejectedValue` and `mockRejectedValueOnce`
+- `[jest-circus]` Setup globals before emitting `setup`, and include Jest globals in the `setup` payload ([#10598](https://github.com/facebook/jest/pull/10598))
+- `[jest-mock]` Fix typings for `mockResolvedValue`, `mockResolvedValueOnce`, `mockRejectedValue` and `mockRejectedValueOnce` ([#10600](https://github.com/facebook/jest/pull/10600))
 
 ### Chore & Maintenance
 

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

@@ -5,7 +5,6 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import * as path from 'path';
 import type {Config} from '@jest/types';
 import type {JestEnvironment} from '@jest/environment';
 import type {TestResult} from '@jest/test-result';
@@ -14,8 +13,7 @@ import type {RuntimeType as Runtime} from 'jest-runtime';
 import type {SnapshotStateType} from 'jest-snapshot';
 import {deepCyclicCopy} from 'jest-util';
 
-const FRAMEWORK_INITIALIZER = path.resolve(__dirname, './jestAdapterInit.js');
-const EXPECT_INITIALIZER = path.resolve(__dirname, './jestExpect.js');
+const FRAMEWORK_INITIALIZER = require.resolve('./jestAdapterInit');
 
 const jestAdapter = async (
   globalConfig: Config.GlobalConfig,
@@ -32,10 +30,6 @@ const jestAdapter = async (
     FRAMEWORK_INITIALIZER,
   );
 
-  const expect = runtime
-    .requireInternalModule<typeof import('./jestExpect')>(EXPECT_INITIALIZER)
-    .default(globalConfig);
-
   const getPrettier = () =>
     config.prettierPath ? require(config.prettierPath) : null;
   const getBabelTraverse = () => require('@babel/traverse').default;
@@ -49,18 +43,10 @@ const jestAdapter = async (
     localRequire: runtime.requireModule.bind(runtime),
     parentProcess: process,
     sendMessageToJest,
+    setGlobalsForRuntime: runtime.setGlobalsForRuntime?.bind(runtime),
     testPath,
   });
 
-  const runtimeGlobals = {expect, ...globals};
-  // TODO: `jest-circus` might be newer than `jest-runtime` - remove `?.` for Jest 27
-  runtime.setGlobalsForRuntime?.(runtimeGlobals);
-
-  // TODO: `jest-circus` might be newer than `jest-config` - remove `??` for Jest 27
-  if (config.injectGlobals ?? true) {
-    Object.assign(environment.global, runtimeGlobals);
-  }
-
   if (config.timers === 'fake' || config.timers === 'legacy') {
     // during setup, this cannot be null (and it's fine to explode if it is)
     environment.fakeTimers!.useFakeTimers();

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

@@ -35,9 +35,14 @@ import {getTestID} from '../utils';
 import run from '../run';
 import testCaseReportHandler from '../testCaseReportHandler';
 import globals from '..';
+import createExpect, {Expect} from './jestExpect';
 
 type Process = NodeJS.Process;
 
+interface JestGlobals extends Global.TestFrameworkGlobals {
+  expect: Expect;
+}
+
 export const initialize = async ({
   config,
   environment,
@@ -46,8 +51,9 @@ export const initialize = async ({
   globalConfig,
   localRequire,
   parentProcess,
-  testPath,
   sendMessageToJest,
+  setGlobalsForRuntime,
+  testPath,
 }: {
   config: Config.ProjectConfig;
   environment: JestEnvironment;
@@ -58,6 +64,7 @@ export const initialize = async ({
   testPath: Config.Path;
   parentProcess: Process;
   sendMessageToJest?: TestFileEvent;
+  setGlobalsForRuntime?: (globals: JestGlobals) => void;
 }): Promise<{
   globals: Global.TestFrameworkGlobals;
   snapshotState: SnapshotStateType;
@@ -120,9 +127,22 @@ export const initialize = async ({
     addEventHandler(environment.handleTestEvent.bind(environment));
   }
 
+  const runtimeGlobals: JestGlobals = {
+    ...globalsObject,
+    expect: createExpect(globalConfig),
+  };
+  // TODO: `jest-circus` might be newer than `jest-runtime` - remove `?.` for Jest 27
+  setGlobalsForRuntime?.(runtimeGlobals);
+
+  // TODO: `jest-circus` might be newer than `jest-config` - remove `??` for Jest 27
+  if (config.injectGlobals ?? true) {
+    Object.assign(environment.global, runtimeGlobals);
+  }
+
   await dispatch({
     name: 'setup',
     parentProcess,
+    runtimeGlobals,
     testNamePattern: globalConfig.testNamePattern,
   });
 

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

@@ -16,7 +16,9 @@ import {
   toThrowErrorMatchingSnapshot,
 } from 'jest-snapshot';
 
-export default (config: Pick<Config.GlobalConfig, 'expand'>): typeof expect => {
+export type Expect = typeof expect;
+
+export default (config: Pick<Config.GlobalConfig, 'expand'>): Expect => {
   expect.setState({expand: config.expand});
   expect.extend({
     toMatchInlineSnapshot,

packages/jest-types/src/Circus.ts

@@ -38,6 +38,11 @@ export interface EventHandler {
 
 export type Event = SyncEvent | AsyncEvent;
 
+interface JestGlobals extends Global.TestFrameworkGlobals {
+  // we cannot type `expect` properly as it'd create circular dependencies
+  expect: unknown;
+}
+
 export type SyncEvent =
   | {
       asyncError: Error;
@@ -77,6 +82,7 @@ export type AsyncEvent =
       // first action to dispatch. Good time to initialize all settings
       name: 'setup';
       testNamePattern?: string;
+      runtimeGlobals: JestGlobals;
       parentProcess: Process;
     }
   | {

packages/jest-util/src/globsToMatcher.ts

@@ -9,12 +9,11 @@ import micromatch = require('micromatch');
 import type {Config} from '@jest/types';
 import replacePathSepForGlob from './replacePathSepForGlob';
 
+type Matcher = (str: Config.Path) => boolean;
+
 const globsToMatchersMap = new Map<
   string,
-  {
-    isMatch: (str: string) => boolean;
-    negated: boolean;
-  }
+  {isMatch: Matcher; negated: boolean}
 >();
 
 const micromatchOptions = {dot: true};
@@ -36,13 +35,11 @@ const micromatchOptions = {dot: true};
  * isMatch('pizza.js'); // true
  * isMatch('pizza.test.js'); // false
  */
-export default function globsToMatcher(
-  globs: Array<Config.Glob>,
-): (path: Config.Path) => boolean {
+export default function globsToMatcher(globs: Array<Config.Glob>): Matcher {
   if (globs.length === 0) {
     // Since there were no globs given, we can simply have a fast path here and
     // return with a very simple function.
-    return (_: Config.Path): boolean => false;
+    return () => false;
   }
 
   const matchers = globs.map(glob => {
@@ -62,7 +59,7 @@ export default function globsToMatcher(
     return globsToMatchersMap.get(glob)!;
   });
 
-  return (path: Config.Path): boolean => {
+  return path => {
     const replacedPath = replacePathSepForGlob(path);
     let kept = undefined;
     let negatives = 0;