Recovered some integration tests

packages/react-dev-utils/package.json

@@ -79,7 +79,7 @@
   },
   "devDependencies": {
     "cross-env": "^7.0.2",
-    "jest": "26.4.2"
+    "jest": "26.6.0"
   },
   "scripts": {
     "test": "cross-env FORCE_COLOR=true jest"

packages/react-error-overlay/src/__tests__/extract-source-map.js

@@ -16,15 +16,15 @@ test('extracts last source map directive', async () => {
 });
 
 test('errors when no source map', async () => {
-  expect.assertions(1);
-
   const testFileName = 'test.js';
+  let error;
   try {
     await extractSourceMapUrl(
       testFileName,
       `console.log('hi')\n\nconsole.log('bye')`
     );
   } catch (e) {
-    expect(e).toBe(`Cannot find a source map directive for ${testFileName}.`);
+    error = e;
   }
+  expect(error).toBe(`Cannot find a source map directive for ${testFileName}.`);
 });

packages/react-error-overlay/src/__tests__/get-source-map.js

@@ -52,12 +52,14 @@ test('error on a source map with unsupported encoding', async () => {
   const file = fs
     .readFileSync(resolve(__dirname, '../../fixtures/junk-inline.mjs'))
     .toString('utf8');
+  let error;
   try {
     await getSourceMap('/', file);
   } catch (e) {
-    expect(e instanceof Error).toBe(true);
-    expect(e.message).toBe(
-      'Sorry, non-base64 inline source-map encoding is not supported.'
-    );
+    error = e;
   }
+  expect(error instanceof Error).toBe(true);
+  expect(error.message).toBe(
+    'Sorry, non-base64 inline source-map encoding is not supported.'
+  );
 });

packages/react-error-overlay/src/__tests__/parser/generic.js

@@ -8,23 +8,25 @@
 import { parse } from '../../utils/parser';
 
 test('throws on null', () => {
-  expect.assertions(2);
+  let error;
   try {
     parse(null);
   } catch (e) {
-    expect(e instanceof Error).toBe(true);
-    expect(e.message).toBe('You cannot pass a null object.');
+    error = e;
   }
+  expect(error instanceof Error).toBe(true);
+  expect(error.message).toBe('You cannot pass a null object.');
 });
 
 test('throws on unparsable', () => {
-  expect.assertions(2);
+  let error;
   try {
     parse({});
   } catch (e) {
-    expect(e instanceof Error).toBe(true);
-    expect(e.message).toBe(
-      'The error you provided does not contain a stack trace.'
-    );
+    error = e;
   }
+  expect(error instanceof Error).toBe(true);
+  expect(error.message).toBe(
+    'The error you provided does not contain a stack trace.'
+  );
 });

packages/react-scripts/config/jest/babelTransform.js

@@ -1,10 +1,11 @@
-// @remove-file-on-eject
+// @remove-on-eject-begin
 /**
  * Copyright (c) 2014-present, Facebook, Inc.
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  */
+// @remove-on-eject-end
 'use strict';
 
 const babelJest = require('babel-jest');

packages/react-scripts/fixtures/kitchensink/template.json

@@ -2,7 +2,7 @@
   "package": {
     "dependencies": {
       "bootstrap": "4.3.1",
-      "jest": "26.4.2",
+      "jest": "26.6.0",
       "node-sass": "4.x",
       "normalize.css": "7.0.0",
       "prop-types": "15.7.2",

packages/react-scripts/fixtures/kitchensink/template/integration/webpack.test.js

@@ -86,7 +86,7 @@ describe('Integration', () => {
       doc = await initDOM('image-inclusion');
 
       expect(doc.getElementById('feature-image-inclusion').src).toMatch(
-        /^data:image\/jpeg;base64.+==$/
+        /^data:image\/jpeg;base64.+=$/
       );
     });
 

packages/react-scripts/scripts/utils/createJestConfig.js

@@ -41,9 +41,9 @@ module.exports = (resolve, rootDir, isEjecting) => {
     testEnvironment: 'jsdom',
     testRunner: require.resolve('jest-circus/runner'),
     transform: {
-      '^.+\\.(js|jsx|mjs|cjs|ts|tsx)$': isEjecting
-        ? '<rootDir>/node_modules/babel-jest'
-        : resolve('config/jest/babelTransform.js'),
+      '^.+\\.(js|jsx|mjs|cjs|ts|tsx)$': resolve(
+        'config/jest/babelTransform.js'
+      ),
       '^.+\\.css$': resolve('config/jest/cssTransform.js'),
       '^(?!.*\\.(js|jsx|mjs|cjs|ts|tsx|css|json)$)': resolve(
         'config/jest/fileTransform.js'