Revert "[ci] Run Jest tests in parallel (#115687)"

This reverts commit 237d68d.

.buildkite/pipelines/hourly.yml

@@ -119,14 +119,6 @@ steps:
         - exit_status: '*'
           limit: 1
 
-  - command: .buildkite/scripts/steps/test/jest.sh
-    label: 'Jest Tests'
-    parallelism: 6
-    agents:
-      queue: n2-4
-    timeout_in_minutes: 90
-    key: jest
-
   - command: .buildkite/scripts/steps/test/jest_integration.sh
     label: 'Jest Integration Tests'
     agents:
@@ -141,6 +133,13 @@ steps:
     timeout_in_minutes: 120
     key: api-integration
 
+  - command: .buildkite/scripts/steps/test/jest.sh
+    label: 'Jest Tests'
+    agents:
+      queue: c2-16
+    timeout_in_minutes: 120
+    key: jest
+
   - command: .buildkite/scripts/steps/lint.sh
     label: 'Linting'
     agents:

.buildkite/pipelines/pull_request/base.yml

@@ -117,14 +117,6 @@ steps:
         - exit_status: '*'
           limit: 1
 
-  - command: .buildkite/scripts/steps/test/jest.sh
-    label: 'Jest Tests'
-    parallelism: 6
-    agents:
-      queue: n2-4
-    timeout_in_minutes: 90
-    key: jest
-
   - command: .buildkite/scripts/steps/test/jest_integration.sh
     label: 'Jest Integration Tests'
     agents:
@@ -139,6 +131,13 @@ steps:
     timeout_in_minutes: 120
     key: api-integration
 
+  - command: .buildkite/scripts/steps/test/jest.sh
+    label: 'Jest Tests'
+    agents:
+      queue: c2-16
+    timeout_in_minutes: 120
+    key: jest
+
   - command: .buildkite/scripts/steps/lint.sh
     label: 'Linting'
     agents:

.buildkite/scripts/steps/test/jest.sh

@@ -9,5 +9,5 @@ is_test_execution_step
 .buildkite/scripts/bootstrap.sh
 
 echo '--- Jest'
-checks-reporter-with-killswitch "Jest Unit Tests $((BUILDKITE_PARALLEL_JOB+1))" \
-  .buildkite/scripts/steps/test/jest_parallel.sh
+checks-reporter-with-killswitch "Jest Unit Tests" \
+  node scripts/jest --ci --verbose --maxWorkers=10

packages/kbn-cli-dev-mode/src/dev_server.test.ts

@@ -79,7 +79,6 @@ expect.addSnapshotSerializer(extendedEnvSerializer);
 beforeEach(() => {
   jest.clearAllMocks();
   log.messages.length = 0;
-  process.execArgv = ['--inheritted', '--exec', '--argv'];
   currentProc = undefined;
 });
 
@@ -139,9 +138,8 @@ describe('#run$', () => {
               "isDevCliChild": "true",
             },
             "nodeOptions": Array [
-              "--inheritted",
-              "--exec",
-              "--argv",
+              "--preserve-symlinks-main",
+              "--preserve-symlinks",
             ],
             "stdio": "pipe",
           },

packages/kbn-rule-data-utils/jest.config.js

@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+module.exports = {
+  preset: '@kbn/test',
+  rootDir: '../..',
+  roots: ['<rootDir>/packages/kbn-rule-data-utils'],
+};

packages/kbn-securitysolution-list-constants/jest.config.js

@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+module.exports = {
+  preset: '@kbn/test',
+  rootDir: '../..',
+  roots: ['<rootDir>/packages/kbn-securitysolution-list-constants'],
+};

packages/kbn-securitysolution-t-grid/jest.config.js

@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+module.exports = {
+  preset: '@kbn/test',
+  rootDir: '../..',
+  roots: ['<rootDir>/packages/kbn-securitysolution-t-grid'],
+};

packages/kbn-test/jest-preset.js

@@ -46,15 +46,7 @@ module.exports = {
   modulePathIgnorePatterns: ['__fixtures__/', 'target/'],
 
   // Use this configuration option to add custom reporters to Jest
-  reporters: [
-    'default',
-    [
-      '@kbn/test/target_node/jest/junit_reporter',
-      {
-        rootDirectory: '.',
-      },
-    ],
-  ],
+  reporters: ['default', '@kbn/test/target_node/jest/junit_reporter'],
 
   // The paths to modules that run some code to configure or set up the testing environment before each test
   setupFiles: [

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

@@ -52,12 +52,11 @@ export function runJest(configName = 'jest.config.js') {
 
   const runStartTime = Date.now();
   const reportTime = getTimeReporter(log, 'scripts/jest');
-
+  let cwd: string;
   let testFiles: string[];
 
-  const cwd: string = process.env.INIT_CWD || process.cwd();
-
   if (!argv.config) {
+    cwd = process.env.INIT_CWD || process.cwd();
     testFiles = argv._.splice(2).map((p) => resolve(cwd, p));
     const commonTestFiles = commonBasePath(testFiles);
     const testFilesProvided = testFiles.length > 0;

src/plugins/expression_error/jest.config.js

@@ -0,0 +1,16 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+module.exports = {
+  preset: '@kbn/test',
+  rootDir: '../../..',
+  roots: ['<rootDir>/src/plugins/expression_error'],
+  coverageDirectory: '<rootDir>/target/kibana-coverage/jest/src/plugins/expression_error',
+  coverageReporters: ['text', 'html'],
+  collectCoverageFrom: ['<rootDir>/src/plugins/expression_error/{common,public}/**/*.{ts,tsx}'],
+};

x-pack/plugins/metrics_entities/jest.config.js

@@ -0,0 +1,15 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+module.exports = {
+  collectCoverageFrom: ['<rootDir>/x-pack/plugins/metrics_entities/{common,server}/**/*.{ts,tsx}'],
+  coverageDirectory: '<rootDir>/target/kibana-coverage/jest/x-pack/plugins/metrics_entities',
+  coverageReporters: ['text', 'html'],
+  preset: '@kbn/test',
+  rootDir: '../../..',
+  roots: ['<rootDir>/x-pack/plugins/metrics_entities'],
+};

x-pack/plugins/reporting/server/browsers/download/ensure_downloaded.test.ts

@@ -17,8 +17,7 @@ import { LevelLogger } from '../../lib';
 jest.mock('./checksum');
 jest.mock('./download');
 
-// https://github.com/elastic/kibana/issues/115881
-describe.skip('ensureBrowserDownloaded', () => {
+describe('ensureBrowserDownloaded', () => {
   let logger: jest.Mocked<LevelLogger>;
 
   beforeEach(() => {

x-pack/plugins/reporting/server/routes/deprecations.test.ts

@@ -24,8 +24,7 @@ import { registerDeprecationsRoutes } from './deprecations';
 
 type SetupServerReturn = UnwrapPromise<ReturnType<typeof setupServer>>;
 
-// https://github.com/elastic/kibana/issues/115881
-describe.skip(`GET ${API_GET_ILM_POLICY_STATUS}`, () => {
+describe(`GET ${API_GET_ILM_POLICY_STATUS}`, () => {
   const reportingSymbol = Symbol('reporting');
   let server: SetupServerReturn['server'];
   let httpSetup: SetupServerReturn['httpSetup'];