Add tests for all variations of jest.resetModules (#10628)

e2e/__tests__/requireMainResetModules.test.ts

@@ -10,14 +10,14 @@ import runJest from '../runJest';
 test("`require.main` on using `--resetModules='true'` should not be undefined", () => {
   const {exitCode} = runJest('require-main-reset-modules', [
     `--resetModules='true'`,
-    'index.test.js',
+    'resetModulesFlag',
   ]);
   expect(exitCode).toBe(0);
 });
 
 test('`require.main` on using `jest.resetModules()` should not be undefined', () => {
   const {exitCode} = runJest('require-main-reset-modules', [
-    'callJestResetModules.test.js',
+    'resetModulesCall',
   ]);
   expect(exitCode).toBe(0);
 });

e2e/require-main-reset-modules/__tests__/resetModulesCallDirectly.test.js

@@ -0,0 +1,23 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+beforeEach(() => {
+  jest.resetModules();
+});
+
+afterEach(() => {
+  jest.resetModules();
+});
+
+test('require.main is set on requiring directly', () => {
+  const {getMain} = require('../direct.js');
+  expect(getMain()).toBeTruthy();
+});
+
+test('require from main works on requiring directly', () => {
+  const {requireFromMain} = require('../direct.js');
+  expect(requireFromMain('../package.json')).toBeTruthy();
+});

e2e/require-main-reset-modules/__tests__/resetModulesCallIndirectly.test.js

@@ -0,0 +1,23 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+beforeEach(() => {
+  jest.resetModules();
+});
+
+afterEach(() => {
+  jest.resetModules();
+});
+
+test('require.main is set on requiring indirectly', () => {
+  const {getMain} = require('../indirect.js');
+  expect(getMain()).toBeTruthy();
+});
+
+test('require from main works on requiring indirectly', () => {
+  const {requireFromMain} = require('../indirect.js');
+  expect(requireFromMain('../package.json')).toBeTruthy();
+});

e2e/require-main-reset-modules/__tests__/index.test.js → e2e/require-main-reset-modules/__tests__/resetModulesFlagDirectly.test.js

@@ -5,11 +5,11 @@
  * LICENSE file in the root directory of this source tree.
  */
 test('require.main is set', () => {
-  const {getMain} = require('../index.js');
+  const {getMain} = require('../direct.js');
   expect(getMain()).toBeTruthy();
 });
 
 test('require from main works', () => {
-  const {requireFromMain} = require('../index.js');
+  const {requireFromMain} = require('../direct.js');
   expect(requireFromMain('../package.json')).toBeTruthy();
 });

e2e/require-main-reset-modules/__tests__/callJestResetModules.test.js → e2e/require-main-reset-modules/__tests__/resetModulesFlagIndirectly.test.js

@@ -4,20 +4,12 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  */
-beforeEach(() => {
-  jest.resetModules();
-});
-
-afterEach(() => {
-  jest.resetModules();
-});
-
 test('require.main is set', () => {
-  const {getMain} = require('../index.js');
+  const {getMain} = require('../indirect.js');
   expect(getMain()).toBeTruthy();
 });
 
 test('require from main works', () => {
-  const {requireFromMain} = require('../index.js');
+  const {requireFromMain} = require('../indirect.js');
   expect(requireFromMain('../package.json')).toBeTruthy();
 });

e2e/require-main-reset-modules/indirect.js

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+const {getMain, requireFromMain} = require('./direct');
+Object.assign(exports, {getMain, requireFromMain});