Consolidates Jest configuration files and scripts (#82671) (#83362)

Jest tests are currently organized into main configuration files (src/dev/jest/config.js and x-pack/dev-tools/jest/create_jest_config.js). Both of these are similar, but very slightly due to  previously being in separate repositories. This change consolidates the scripts referenced in those configs and moves them to the `@kbn/test` project.

OSS contained an alias for `test_utils`. Those aliases have been removed in favor of importing these utilities from `@kbn/test/jest`

Blocker to #72569

Signed-off-by: Tyler Smalley <tyler.smalley@elastic.co>

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

packages/kbn-es-archiver/package.json

@@ -11,6 +11,7 @@
     "kbn:watch": "rm -rf target && ../../node_modules/.bin/tsc --watch"
   },
   "dependencies": {
-    "@kbn/dev-utils": "link:../kbn-dev-utils"
+    "@kbn/dev-utils": "link:../kbn-dev-utils",
+    "@kbn/test": "link:../kbn-test"
   }
 }

packages/kbn-eslint-import-resolver-kibana/lib/get_webpack_config.js

@@ -29,7 +29,6 @@ exports.getWebpackConfig = function (kibanaPath) {
       alias: {
         // Dev defaults for test bundle https://github.com/elastic/kibana/blob/6998f074542e8c7b32955db159d15661aca253d7/src/core_plugins/tests_bundle/index.js#L73-L78
         fixtures: resolve(kibanaPath, 'src/fixtures'),
-        test_utils: resolve(kibanaPath, 'src/test_utils/public'),
       },
       unsafeCache: true,
     },

packages/kbn-i18n/GUIDELINE.md

@@ -391,7 +391,7 @@ Testing React component that uses the `injectI18n` higher-order component is mor
 
 With shallow rendering only top level component is rendered, that is a wrapper itself, not the original component. Since we want to test the rendering of the original component, we need to access it via the wrapper's `WrappedComponent` property. Its value will be the component we passed into `injectI18n()`.
 
-When testing such component, use the `shallowWithIntl` helper function defined in `test_utils/enzyme_helpers` and pass the component's `WrappedComponent` property to render the wrapped component. This will shallow render the component with Enzyme and inject the necessary context and props to use the `intl` mock defined in `test_utils/mocks/intl`.
+When testing such component, use the `shallowWithIntl` helper function defined in `@kbn/test/jest` and pass the component's `WrappedComponent` property to render the wrapped component. This will shallow render the component with Enzyme and inject the necessary context and props to use the `intl` mock defined in `test_utils/mocks/intl`.
 
 Use the `mountWithIntl` helper function to mount render the component.
 

packages/kbn-test/jest-preset.js

@@ -0,0 +1,111 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+// For a detailed explanation regarding each configuration property, visit:
+// https://jestjs.io/docs/en/configuration.html
+
+const { resolve } = require('path');
+
+module.exports = {
+  // The directory where Jest should output its coverage files
+  coverageDirectory: '<rootDir>/target/kibana-coverage/jest',
+
+  // An array of regexp pattern strings used to skip coverage collection
+  coveragePathIgnorePatterns: ['/node_modules/', '.*\\.d\\.ts'],
+
+  // A list of reporter names that Jest uses when writing coverage reports
+  coverageReporters: !!process.env.CODE_COVERAGE ? ['json'] : ['html', 'text'],
+
+  // An array of file extensions your modules use
+  moduleFileExtensions: ['js', 'mjs', 'json', 'ts', 'tsx', 'node'],
+
+  // A map from regular expressions to module names or to arrays of module names that allow to stub out resources with a single module
+  moduleNameMapper: {
+    '@elastic/eui/lib/(.*)?': '<rootDir>/node_modules/@elastic/eui/test-env/$1',
+    '@elastic/eui$': '<rootDir>/node_modules/@elastic/eui/test-env',
+    '\\.module.(css|scss)$': '<rootDir>/packages/kbn-test/target/jest/mocks/css_module_mock.js',
+    '\\.(css|less|scss)$': '<rootDir>/packages/kbn-test/target/jest/mocks/style_mock.js',
+    '\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$':
+      '<rootDir>/packages/kbn-test/target/jest/mocks/file_mock.js',
+    '\\.ace\\.worker.js$': '<rootDir>/packages/kbn-test/target/jest/mocks/worker_module_mock.js',
+    '\\.editor\\.worker.js$': '<rootDir>/packages/kbn-test/target/jest/mocks/worker_module_mock.js',
+    '^(!!)?file-loader!': '<rootDir>/packages/kbn-test/target/jest/mocks/file_mock.js',
+    '^fixtures/(.*)': '<rootDir>/src/fixtures/$1',
+    '^src/core/(.*)': '<rootDir>/src/core/$1',
+    '^src/legacy/(.*)': '<rootDir>/src/legacy/$1',
+    '^src/plugins/(.*)': '<rootDir>/src/plugins/$1',
+  },
+
+  // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
+  modulePathIgnorePatterns: ['__fixtures__/', 'target/'],
+
+  // Use this configuration option to add custom reporters to Jest
+  reporters: ['default', resolve(__dirname, './target/jest/junit_reporter')],
+
+  // The paths to modules that run some code to configure or set up the testing environment before each test
+  setupFiles: [
+    '<rootDir>/packages/kbn-test/target/jest/setup/babel_polyfill.js',
+    '<rootDir>/packages/kbn-test/target/jest/setup/polyfills.js',
+    '<rootDir>/packages/kbn-test/target/jest/setup/enzyme.js',
+  ],
+
+  // A list of paths to modules that run some code to configure or set up the testing framework before each test
+  setupFilesAfterEnv: [
+    '<rootDir>/packages/kbn-test/target/jest/setup/setup_test.js',
+    '<rootDir>/packages/kbn-test/target/jest/setup/mocks.js',
+    '<rootDir>/packages/kbn-test/target/jest/setup/react_testing_library.js',
+  ],
+
+  // A list of paths to snapshot serializer modules Jest should use for snapshot testing
+  snapshotSerializers: [
+    '<rootDir>/src/plugins/kibana_react/public/util/test_helpers/react_mount_serializer.ts',
+    '<rootDir>/node_modules/enzyme-to-json/serializer',
+  ],
+
+  // The test environment that will be used for testing
+  testEnvironment: 'jest-environment-jsdom-thirteen',
+
+  // The glob patterns Jest uses to detect test files
+  testMatch: ['**/*.test.{js,mjs,ts,tsx}'],
+
+  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
+  testPathIgnorePatterns: [
+    '<rootDir>/packages/kbn-ui-framework/(dist|doc_site|generator-kui)/',
+    '<rootDir>/packages/kbn-pm/dist/',
+    `integration_tests/`,
+  ],
+
+  // This option allows use of a custom test runner
+  testRunner: 'jest-circus/runner',
+
+  // A map from regular expressions to paths to transformers
+  transform: {
+    '^.+\\.(js|tsx?)$': '<rootDir>/packages/kbn-test/target/jest/babel_transform.js',
+    '^.+\\.txt?$': 'jest-raw-loader',
+    '^.+\\.html?$': 'jest-raw-loader',
+  },
+
+  // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
+  transformIgnorePatterns: [
+    // ignore all node_modules except monaco-editor which requires babel transforms to handle dynamic import()
+    // since ESM modules are not natively supported in Jest yet (https://github.com/facebook/jest/issues/4842)
+    '[/\\\\]node_modules(?![\\/\\\\]monaco-editor)[/\\\\].+\\.js$',
+    'packages/kbn-pm/dist/index.js',
+  ],
+};

packages/kbn-test/jest/package.json

@@ -0,0 +1,4 @@
+{
+  "main": "../target/jest",
+  "types": "../target/types/jest/index.d.ts"
+}

packages/kbn-test/package.json

@@ -5,16 +5,22 @@
   "license": "Apache-2.0",
   "main": "./target/index.js",
   "scripts": {
-    "build": "../../node_modules/.bin/babel src --out-dir target --delete-dir-on-start --extensions .ts,.js,.tsx --ignore *.test.js,**/__tests__/** --source-maps=inline",
-    "kbn:bootstrap": "yarn build",
-    "kbn:watch": "yarn build --watch"
+    "build": "node scripts/build",
+    "kbn:bootstrap": "node scripts/build --source-maps",
+    "kbn:watch": "node scripts/build --watch --source-maps"
   },
   "kibana": {
     "devOnly": true
   },
+  "dependencies": {
+    "@kbn/es": "link:../kbn-es",
+    "@kbn/i18n": "link:../kbn-i18n",
+    "@kbn/optimizer": "link:../kbn-optimizer"
+  },
   "devDependencies": {
     "@kbn/babel-preset": "link:../kbn-babel-preset",
     "@kbn/dev-utils": "link:../kbn-dev-utils",
+    "@kbn/expect": "link:../kbn-expect",
     "@kbn/utils": "link:../kbn-utils"
   }
 }

packages/kbn-test/scripts/build.js

@@ -0,0 +1,91 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+const { resolve } = require('path');
+
+const del = require('del');
+const supportsColor = require('supports-color');
+const { run, withProcRunner } = require('@kbn/dev-utils');
+
+const ROOT_DIR = resolve(__dirname, '..');
+const BUILD_DIR = resolve(ROOT_DIR, 'target');
+
+const padRight = (width, str) =>
+  str.length >= width ? str : `${str}${' '.repeat(width - str.length)}`;
+
+run(
+  async ({ log, flags }) => {
+    await withProcRunner(log, async (proc) => {
+      log.info('Deleting old output');
+      await del(BUILD_DIR);
+
+      const cwd = ROOT_DIR;
+      const env = { ...process.env };
+      if (supportsColor.stdout) {
+        env.FORCE_COLOR = 'true';
+      }
+
+      log.info(`Starting babel and typescript${flags.watch ? ' in watch mode' : ''}`);
+      await Promise.all([
+        proc.run(padRight(10, `babel`), {
+          cmd: 'babel',
+          args: [
+            'src',
+            '--config-file',
+            require.resolve('../babel.config.js'),
+            '--out-dir',
+            BUILD_DIR,
+            '--extensions',
+            '.ts,.js,.tsx',
+            ...(flags.watch ? ['--watch'] : ['--quiet']),
+            ...(!flags['source-maps'] || !!process.env.CODE_COVERAGE
+              ? []
+              : ['--source-maps', 'inline']),
+          ],
+          wait: true,
+          env,
+          cwd,
+        }),
+
+        proc.run(padRight(10, 'tsc'), {
+          cmd: 'tsc',
+          args: [
+            ...(flags.watch ? ['--watch', '--preserveWatchOutput', 'true'] : []),
+            ...(flags['source-maps'] ? ['--declarationMap', 'true'] : []),
+          ],
+          wait: true,
+          env,
+          cwd,
+        }),
+      ]);
+
+      log.success('Complete');
+    });
+  },
+  {
+    description: 'Simple build tool for @kbn/i18n package',
+    flags: {
+      boolean: ['watch', 'source-maps'],
+      help: `
+        --watch            Run in watch mode
+        --source-maps      Include sourcemaps
+      `,
+    },
+  }
+);

packages/kbn-test/src/index.ts

@@ -58,5 +58,3 @@ export { runFailedTestsReporterCli } from './failed_tests_reporter';
 export { CI_PARALLEL_PROCESS_PREFIX } from './ci_parallel_process_prefix';
 
 export * from './functional_test_runner';
-
-export * from './jest';

packages/kbn-test/src/jest/index.ts

@@ -17,6 +17,4 @@
  * under the License.
  */
 
-export * from './junit_reporter';
-
-export * from './report_path';
+export * from './utils';

packages/kbn-test/src/jest/integration_tests/junit_reporter.test.ts

@@ -24,7 +24,7 @@ import { readFileSync } from 'fs';
 import del from 'del';
 import execa from 'execa';
 import xml2js from 'xml2js';
-import { getUniqueJunitReportPath } from '@kbn/test';
+import { getUniqueJunitReportPath } from '../../report_path';
 import { REPO_ROOT } from '@kbn/utils';
 
 const MINUTE = 1000 * 60;

packages/kbn-test/src/jest/junit_reporter.ts

@@ -27,7 +27,7 @@ import type { Config } from '@jest/types';
 import { AggregatedResult, Test, BaseReporter } from '@jest/reporters';
 
 import { escapeCdata } from '../mocha/xml';
-import { getUniqueJunitReportPath } from './report_path';
+import { getUniqueJunitReportPath } from '../report_path';
 
 interface ReporterOptions {
   reportName?: string;

src/dev/jest/setup/polyfills.js → packages/kbn-test/src/jest/setup/polyfills.js

@@ -28,3 +28,11 @@ const MutationObserver = require('mutation-observer');
 Object.defineProperty(window, 'MutationObserver', { value: MutationObserver });
 
 require('whatwg-fetch');
+
+if (!global.URL.hasOwnProperty('createObjectURL')) {
+  Object.defineProperty(global.URL, 'createObjectURL', { value: () => '' });
+}
+
+// Will be replaced with a better solution in EUI
+// https://github.com/elastic/eui/issues/3713
+global._isJest = true;

src/test_utils/public/helpers/index.ts → packages/kbn-test/src/jest/setup/react_mount_serializer.ts

@@ -17,17 +17,14 @@
  * under the License.
  */
 
-export { findTestSubject } from './find_test_subject';
+export function test(value: any) {
+  return value && value.__reactMount__;
+}
 
-export { WithStore } from './redux_helpers';
-
-export { WithMemoryRouter, WithRoute, reactRouterMock } from './router_helpers';
-
-export * from './utils';
-
-export {
-  setSVGElementGetBBox,
-  setHTMLElementOffset,
-  setHTMLElementClientSizes,
-  setSVGElementGetComputedTextLength,
-} from './jsdom_svg_mocks';
+export function print(value: any, serialize: any) {
+  // there is no proper way to correctly indent multiline values
+  // so the trick here is to use the Object representation and rewriting the root object name
+  return serialize({
+    reactNode: value.__reactMount__,
+  }).replace('Object', 'MountPoint');
+}

src/test_utils/public/index.ts → packages/kbn-test/src/jest/setup/setup_test.js

@@ -17,9 +17,10 @@
  * under the License.
  */
 
-export {
-  setSVGElementGetBBox,
-  setHTMLElementOffset,
-  setHTMLElementClientSizes,
-  setSVGElementGetComputedTextLength,
-} from './helpers';
+/*
+  Global import, so we don't need to remember to import the lib in each file
+  https://www.npmjs.com/package/jest-styled-components#global-installation
+*/
+
+import 'jest-styled-components';
+import '@testing-library/jest-dom';

x-pack/test_utils/enzyme_helpers.tsx → packages/kbn-test/src/jest/utils/enzyme_helpers.tsx

@@ -1,7 +1,20 @@
 /*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License;
- * you may not use this file except in compliance with the Elastic License.
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
 /**
@@ -192,4 +205,14 @@ export const mountHook = <Args extends {}, HookValue extends any>(
   };
 };
 
-export const nextTick = () => new Promise((res) => process.nextTick(res));
+export function shallowWithI18nProvider<T>(child: ReactElement<T>) {
+  const wrapped = shallow(<I18nProvider>{child}</I18nProvider>);
+  const name = typeof child.type === 'string' ? child.type : child.type.name;
+  return wrapped.find(name).dive();
+}
+
+export function mountWithI18nProvider<T>(child: ReactElement<T>) {
+  const wrapped = mount(<I18nProvider>{child}</I18nProvider>);
+  const name = typeof child.type === 'string' ? child.type : child.type.name;
+  return wrapped.find(name);
+}