chore: upgrade to jest 24

package.json

@@ -62,14 +62,15 @@
     "google-closure-compiler": "20190301.0.0",
     "gzip-size": "^3.0.0",
     "jasmine-check": "^1.0.0-rc.0",
-    "jest": "^23",
-    "jest-diff": "^23",
+    "jest": "^24.9.0",
+    "jest-diff": "^24.9.0",
     "jest-snapshot-serializer-raw": "^1.1.0",
     "minimatch": "^3.0.4",
     "minimist": "^1.2.0",
     "mkdirp": "^0.5.1",
     "ncp": "^2.0.0",
     "object-assign": "^4.1.1",
+    "pacote": "^9.5.6",
     "prettier": "1.13.7",
     "prop-types": "^15.6.2",
     "random-seed": "^0.3.0",
@@ -100,7 +101,7 @@
     "lint": "node ./scripts/tasks/eslint.js",
     "lint-build": "node ./scripts/rollup/validate/index.js",
     "extract-errors": "yarn build --type=dev --extract-errors",
-    "postinstall": "node node_modules/fbjs-scripts/node/check-dev-engines.js package.json && node ./scripts/flow/createFlowConfigs.js",
+    "postinstall": "node node_modules/fbjs-scripts/node/check-dev-engines.js package.json && node ./scripts/flow/createFlowConfigs.js && node ./scripts/yarn/downloadReactIsForPrettyFormat.js",
     "debug-test": "cross-env NODE_ENV=development node --inspect-brk node_modules/.bin/jest --config ./scripts/jest/config.source.js --runInBand",
     "test": "cross-env NODE_ENV=development jest --config ./scripts/jest/config.source.js",
     "test-persistent": "cross-env NODE_ENV=development jest --config ./scripts/jest/config.source-persistent.js",

packages/jest-mock-scheduler/package.json

@@ -19,7 +19,7 @@
   },
   "homepage": "https://reactjs.org/",
   "peerDependencies": {
-    "jest": "^23.0.1",
+    "jest": "^23.0.1 || ^24.0.0",
     "scheduler": "^0.15.0"
   },
   "files": [

packages/jest-react/package.json

@@ -19,7 +19,7 @@
   },
   "homepage": "https://reactjs.org/",
   "peerDependencies": {
-    "jest": "^23.0.1",
+    "jest": "^23.0.1 || ^24.0.0",
     "react": "^16.0.0",
     "react-test-renderer": "^16.0.0"
   },

packages/react-devtools-extensions/package.json

@@ -25,7 +25,6 @@
     "archiver": "^3.0.0",
     "babel-core": "^7.0.0-bridge",
     "babel-eslint": "^9.0.0",
-    "babel-jest": "^24.7.1",
     "babel-loader": "^8.0.4",
     "chrome-launch": "^1.1.4",
     "child-process-promise": "^2.2.1",

packages/react-devtools-inline/package.json

@@ -33,7 +33,6 @@
     "@babel/preset-react": "^7.0.0",
     "babel-core": "^7.0.0-bridge",
     "babel-eslint": "^9.0.0",
-    "babel-jest": "^24.7.1",
     "babel-loader": "^8.0.4",
     "cross-env": "^3.1.4",
     "css-loader": "^1.0.1",

packages/react-devtools-shared/src/__tests__/utils.js

@@ -25,7 +25,7 @@ export function act(callback: Function): void {
   });
 
   // Flush Bridge operations
-  while (global.mockGetTimersCount() > 0) {
+  while (jest.getTimerCount() > 0) {
     actDOM(() => {
       actTestRenderer(() => {
         jest.runAllTimers();
@@ -49,8 +49,7 @@ export async function actAsync(
   });
 
   if (recursivelyFlush) {
-    // TODO (Jest v24)  Replace with jest.getTimerCount() after we upgrade Jest
-    while (global.mockGetTimersCount() > 0) {
+    while (jest.getTimerCount() > 0) {
       // $FlowFixMe Flow doens't know about "await act()" yet
       await actDOM(async () => {
         await actTestRenderer(async () => {

packages/react-devtools-shell/package.json

@@ -21,7 +21,6 @@
     "@babel/preset-react": "^7.0.0",
     "babel-core": "^7.0.0-bridge",
     "babel-eslint": "^9.0.0",
-    "babel-jest": "^24.7.1",
     "babel-loader": "^8.0.4",
     "cross-env": "^3.1.4",
     "css-loader": "^1.0.1",

packages/react-test-renderer/src/__tests__/ReactTestRendererAsync-test.js

@@ -160,7 +160,7 @@ describe('ReactTestRendererAsync', () => {
 
       expect(() =>
         expect(Scheduler).toFlushAndYieldThrough(['foo', 'baz']),
-      ).toThrow('Expected value to equal:');
+      ).toThrow('// deep equality');
     });
 
     it('toFlushAndYield', () => {
@@ -181,7 +181,7 @@ describe('ReactTestRendererAsync', () => {
       );
 
       expect(() => expect(Scheduler).toFlushWithoutYielding()).toThrowError(
-        'Expected value to equal:',
+        '// deep equality',
       );
 
       renderer.update(
@@ -193,7 +193,7 @@ describe('ReactTestRendererAsync', () => {
       );
 
       expect(() => expect(Scheduler).toFlushAndYield(['foo', 'baz'])).toThrow(
-        'Expected value to equal:',
+        '// deep equality',
       );
     });
 
@@ -254,7 +254,7 @@ describe('ReactTestRendererAsync', () => {
 
     ReactTestRenderer.create(<App />);
     expect(() => expect(Scheduler).toHaveYielded(['A', 'B'])).toThrow(
-      'Expected value to equal:',
+      '// deep equality',
     );
   });
 

scripts/jest/config.base.js

@@ -12,7 +12,7 @@ module.exports = {
     '.*': require.resolve('./preprocessor.js'),
   },
   setupFiles: [require.resolve('./setupEnvironment.js')],
-  setupTestFrameworkScriptFile: require.resolve('./setupTests.js'),
+  setupFilesAfterEnv: [require.resolve('./setupTests.js')],
   // Only include files directly in __tests__, not in nested folders.
   testRegex: '/__tests__/[^/]*(\\.js|\\.coffee|[^d]\\.ts)$',
   moduleFileExtensions: ['js', 'json', 'node', 'coffee', 'ts'],

scripts/jest/config.build-devtools.js

@@ -60,8 +60,9 @@ module.exports = Object.assign({}, baseConfig, {
       '../../packages/react-devtools-shared/src/__tests__/setupEnv.js'
     ),
   ],
-  // TODO (Jest v24) Rename "setupFilesAfterEnv" after Jest upgrade
-  setupTestFrameworkScriptFile: require.resolve(
-    '../../packages/react-devtools-shared/src/__tests__/setupTests.js'
-  ),
+  setupFilesAfterEnv: [
+    require.resolve(
+      '../../packages/react-devtools-shared/src/__tests__/setupTests.js'
+    ),
+  ],
 });

scripts/jest/preprocessor.js

@@ -62,6 +62,9 @@ module.exports = {
     if (filePath.match(/\.ts$/) && !filePath.match(/\.d\.ts$/)) {
       return tsPreprocessor.compile(src, filePath);
     }
+    if (filePath.match(/\.json$/)) {
+      return src;
+    }
     if (!filePath.match(/\/third_party\//)) {
       // for test files, we also apply the async-await transform, but we want to
       // make sure we don't accidentally apply that transform to product code.

scripts/yarn/downloadReactIsForPrettyFormat.js

@@ -0,0 +1,30 @@
+'use strict';
+
+const path = require('path');
+const pacote = require('pacote');
+const rimraf = require('rimraf');
+const prettyFormatPkg = require('pretty-format/package.json');
+const prettyFormatPkgPath = require.resolve('pretty-format/package.json');
+
+const reactIsDependencyVersion = prettyFormatPkg.dependencies['react-is'];
+
+if (!reactIsDependencyVersion) {
+  throw new Error('Unable to find `react-is` dependency in `pretty-format`');
+}
+
+const prettyFormatNodeModulesReactIsDir = path.join(
+  path.dirname(prettyFormatPkgPath),
+  'node_modules/react-is'
+);
+
+rimraf.sync(prettyFormatNodeModulesReactIsDir);
+
+pacote
+  .extract(
+    `react-is@${reactIsDependencyVersion}`,
+    prettyFormatNodeModulesReactIsDir
+  )
+  .catch(error => {
+    console.error(error);
+    process.exitCode = 1;
+  });