Add yarn test-bundles and yarn test-prod-bundles

Only files ending with -test.public.js are opted in (so far we don't have any).

package.json

@@ -105,6 +105,8 @@
     "postinstall": "node node_modules/fbjs-scripts/node/check-dev-engines.js package.json",
     "test": "cross-env NODE_ENV=development jest --config ./scripts/jest/config.source.js",
     "test-prod": "cross-env NODE_ENV=production jest --config ./scripts/jest/config.source.js",
+    "test-bundles": "cross-env NODE_ENV=development jest --config ./scripts/jest/config.bundles.js",
+    "test-bundles-prod": "cross-env NODE_ENV=production jest --config ./scripts/jest/config.bundles.js",
     "flow": "node ./scripts/tasks/flow.js",
     "prettier": "node ./scripts/prettier/index.js write-changed",
     "prettier-all": "node ./scripts/prettier/index.js write",

scripts/jest/config.base.js

@@ -0,0 +1,19 @@
+'use strict';
+
+module.exports = {
+  modulePathIgnorePatterns: [
+    '<rootDir>/scripts/rollup/shims/',
+    '<rootDir>/scripts/bench/',
+  ],
+  transform: {
+    '.*': require.resolve('./preprocessor.js'),
+  },
+  setupFiles: [require.resolve('./setupEnvironment.js')],
+  setupTestFrameworkScriptFile: require.resolve('./setupTests.js'),
+  testRegex: '/__tests__/.*(\\.js|\\.coffee|[^d]\\.ts)$',
+  moduleFileExtensions: ['js', 'json', 'node', 'coffee', 'ts'],
+  rootDir: process.cwd(),
+  roots: ['<rootDir>/packages', '<rootDir>/scripts'],
+  collectCoverageFrom: ['packages/**/*.js'],
+  timers: 'fake',
+};

scripts/jest/config.bundles.js

@@ -0,0 +1,32 @@
+'use strict';
+
+const {readdirSync, statSync} = require('fs');
+const {join} = require('path');
+
+// Create a module map to point React packages to the build output.
+const baseConfig = require('./config.base');
+const packagesRoot = join(__dirname, '..', '..', 'packages');
+const packages = readdirSync(packagesRoot).filter(dir => {
+  if (dir.charAt(0) === '.') {
+    return false;
+  }
+  const packagePath = join(packagesRoot, dir, 'package.json');
+  return statSync(packagePath).isFile();
+});
+const moduleNameMapper = {};
+packages.forEach(name => {
+  // Root entry point
+  moduleNameMapper[`^${name}$`] = `<rootDir>/build/packages/${name}`;
+  // Named entry points
+  moduleNameMapper[`^${name}/(.*)$`] = `<rootDir>/build/packages/${name}/$1`;
+});
+
+module.exports = Object.assign({}, baseConfig, {
+  // Redirect imports to the compiled bundles.
+  moduleNameMapper,
+  // Only run bundle tests on whitelisted .public.* files.
+  // TODO: switch to a blacklist instead when enough tests are opted in.
+  testRegex: '/__tests__/.*\\.public\\.js$',
+  // Exclude the build output from transforms.
+  transformIgnorePatterns: ['/node_modules/', '<rootDir>/build/'],
+});

scripts/jest/config.source.js

@@ -1,19 +1,5 @@
 'use strict';
 
-module.exports = {
-  modulePathIgnorePatterns: [
-    '<rootDir>/scripts/rollup/shims/',
-    '<rootDir>/scripts/bench/',
-  ],
-  transform: {
-    '.*': require.resolve('./preprocessor.js'),
-  },
-  setupFiles: [require.resolve('./setupEnvironment.js')],
-  setupTestFrameworkScriptFile: require.resolve('./setupTests.js'),
-  testRegex: '/__tests__/.*(\\.js|\\.coffee|[^d]\\.ts)$',
-  moduleFileExtensions: ['js', 'json', 'node', 'coffee', 'ts'],
-  rootDir: process.cwd(),
-  roots: ['<rootDir>/packages', '<rootDir>/scripts'],
-  collectCoverageFrom: ['packages/**/*.js'],
-  timers: 'fake',
-};
+const baseConfig = require('./config.base');
+
+module.exports = Object.assign({}, baseConfig);

scripts/jest/setupEnvironment.js

@@ -1,16 +1,5 @@
 /* eslint-disable */
 
-jest.mock('shared/ReactFeatureFlags', () => {
-  // We can alter flags based on environment here
-  // (e.g. for CI runs with different flags).
-  return require.requireActual('shared/ReactFeatureFlags');
-});
-
-// Error logging varies between Fiber and Stack;
-// Rather than fork dozens of tests, mock the error-logging file by default.
-// TODO: direct imports like some-package/src/* are bad. Fix me.
-jest.mock('react-reconciler/src/ReactFiberErrorLogger');
-
 const NODE_ENV = process.env.NODE_ENV;
 if (NODE_ENV !== 'development' && NODE_ENV !== 'production') {
   throw new Error('NODE_ENV must either be set to development or production.');