[ci] Splits Jest integration tests (elastic#125454) (elastic#125532)

(cherry picked from commit 435b772)

Co-authored-by: Tyler Smalley <[email protected]>

.buildkite/pipelines/hourly.yml

@@ -127,9 +127,10 @@ steps:
 
   - command: .buildkite/scripts/steps/test/jest_integration.sh
     label: 'Jest Integration Tests'
+    parallelism: 2
     agents:
       queue: n2-4
-    timeout_in_minutes: 120
+    timeout_in_minutes: 90
     key: jest-integration
 
   - command: .buildkite/scripts/steps/test/api_integration.sh

.buildkite/pipelines/pull_request/base.yml

@@ -127,9 +127,10 @@ steps:
 
   - command: .buildkite/scripts/steps/test/jest_integration.sh
     label: 'Jest Integration Tests'
+    parallelism: 2
     agents:
       queue: n2-4
-    timeout_in_minutes: 120
+    timeout_in_minutes: 90
     key: jest-integration
 
   - command: .buildkite/scripts/steps/test/api_integration.sh

.buildkite/scripts/steps/test/jest_integration.sh

@@ -9,5 +9,5 @@ is_test_execution_step
 .buildkite/scripts/bootstrap.sh
 
 echo '--- Jest Integration Tests'
-checks-reporter-with-killswitch "Jest Integration Tests" \
-  node --max-old-space-size=6144 scripts/jest_integration --ci
+checks-reporter-with-killswitch "Jest Integration Tests $((BUILDKITE_PARALLEL_JOB+1))" \
+  .buildkite/scripts/steps/test/jest_parallel.sh jest.integration.config.js

.buildkite/scripts/steps/test/jest_parallel.sh

@@ -13,7 +13,7 @@ exitCode=0
 while read -r config; do
   if [ "$((i % JOB_COUNT))" -eq "$JOB" ]; then
     echo "--- $ node scripts/jest --config $config"
-    node --max-old-space-size=14336 ./node_modules/.bin/jest --config="$config" --runInBand --coverage=false
+    node --max-old-space-size=14336 ./node_modules/.bin/jest --config="$config" --runInBand --coverage=false --passWithNoTests
     lastCode=$?
 
     if [ $lastCode -ne 0 ]; then
@@ -25,6 +25,6 @@ while read -r config; do
 
   ((i=i+1))
 # uses heredoc to avoid the while loop being in a sub-shell thus unable to overwrite exitCode
-done <<< "$(find src x-pack packages -name jest.config.js -not -path "*/__fixtures__/*" | sort)"
+done <<< "$(find src x-pack packages -name ${1:-jest.config.js} -not -path "*/__fixtures__/*" | sort)"
 
-exit $exitCode
+exit $exitCode

dev_docs/tutorials/debugging.mdx

@@ -21,7 +21,9 @@ Next we will go over how to exactly enable the inspector for different aspects o
 
 You will need to run Jest directly from the Node script:
 
-`node --inspect-brk scripts/jest [TestPathPattern]`
+`node --inspect-brk node_modules/.bin/jest --runInBand --config [JestConfig] [TestPathPattern]`
+
+Additional information can be found in the [Jest troubleshooting documentation](https://jestjs.io/docs/troubleshooting).
 
 ### Functional Test Runner
 

packages/kbn-es/jest.integration.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/jest_integration',
+  rootDir: '../..',
+  roots: ['<rootDir>/packages/kbn-es'],
+};

packages/kbn-optimizer/jest.integration.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/jest_integration',
+  rootDir: '../..',
+  roots: ['<rootDir>/packages/kbn-optimizer'],
+};

packages/kbn-plugin-generator/jest.integration.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/jest_integration',
+  rootDir: '../..',
+  roots: ['<rootDir>/packages/kbn-plugin-generator'],
+};

packages/kbn-plugin-helpers/jest.integration.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/jest_integration',
+  rootDir: '../..',
+  roots: ['<rootDir>/packages/kbn-plugin-helpers'],
+};

packages/kbn-test/jest.integration.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/jest_integration',
+  rootDir: '../..',
+  roots: ['<rootDir>/packages/kbn-test'],
+};

packages/kbn-test/jest_integration/jest-preset.js

@@ -20,7 +20,13 @@ module.exports = {
   ],
   reporters: [
     'default',
-    ['@kbn/test/target_node/jest/junit_reporter', { reportName: 'Jest Integration Tests' }],
+    [
+      '@kbn/test/target_node/jest/junit_reporter',
+      {
+        rootDirectory: '.',
+        reportName: 'Jest Integration Tests',
+      },
+    ],
     [
       '@kbn/test/target_node/jest/ci_stats_jest_reporter',
       {

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

@@ -0,0 +1,9 @@
+/*
+ * 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.
+ */
+
+export * from './jest_configs';

packages/kbn-test/src/jest/configs/jest_configs.test.ts

@@ -0,0 +1,116 @@
+/*
+ * 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.
+ */
+
+import mockFs from 'mock-fs';
+import fs from 'fs';
+
+import { JestConfigs } from './jest_configs';
+
+describe('jestConfigs', () => {
+  let jestConfigs: JestConfigs;
+
+  beforeEach(async () => {
+    mockFs({
+      '/kbn-test/packages': {
+        a: {
+          'jest.config.js': '',
+          'a_first.test.js': '',
+          'a_second.test.js': '',
+        },
+        b: {
+          'b.test.js': '',
+          integration_tests: {
+            'b_integration.test.js': '',
+          },
+          nested: {
+            d: {
+              'd.test.js': '',
+            },
+          },
+        },
+        c: {
+          'jest.integration.config.js': '',
+          integration_tests: {
+            'c_integration.test.js': '',
+          },
+        },
+      },
+    });
+    jestConfigs = new JestConfigs('/kbn-test', ['packages/b/nested', 'packages']);
+  });
+
+  afterEach(mockFs.restore);
+
+  describe('#files', () => {
+    it('lists unit test files', async () => {
+      const files = await jestConfigs.files('unit');
+      expect(files).toEqual([
+        'packages/a/a_first.test.js',
+        'packages/a/a_second.test.js',
+        'packages/b/b.test.js',
+        'packages/b/nested/d/d.test.js',
+      ]);
+    });
+
+    it('lists integration test files', async () => {
+      const files = await jestConfigs.files('integration');
+      expect(files).toEqual([
+        'packages/b/integration_tests/b_integration.test.js',
+        'packages/c/integration_tests/c_integration.test.js',
+      ]);
+    });
+  });
+
+  describe('#expected', () => {
+    it('expects unit config files', async () => {
+      const files = await jestConfigs.expected('unit');
+      expect(files).toEqual([
+        'packages/a/jest.config.js',
+        'packages/b/jest.config.js',
+        'packages/b/nested/d/jest.config.js',
+      ]);
+    });
+
+    it('expects integration config files', async () => {
+      const files = await jestConfigs.expected('integration');
+      expect(files).toEqual([
+        'packages/b/jest.integration.config.js',
+        'packages/c/jest.integration.config.js',
+      ]);
+    });
+
+    it('throws if test file outside root', async () => {
+      fs.writeFileSync('/kbn-test/bad.test.js', '');
+      await expect(() => jestConfigs.expected('unit')).rejects.toMatchSnapshot();
+    });
+  });
+
+  describe('#existing', () => {
+    it('lists existing unit test config files', async () => {
+      const files = await jestConfigs.existing('unit');
+      expect(files).toEqual(['packages/a/jest.config.js']);
+    });
+
+    it('lists existing integration test config files', async () => {
+      const files = await jestConfigs.existing('integration');
+      expect(files).toEqual(['packages/c/jest.integration.config.js']);
+    });
+  });
+
+  describe('#missing', () => {
+    it('lists existing unit test config files', async () => {
+      const files = await jestConfigs.missing('unit');
+      expect(files).toEqual(['packages/b/jest.config.js', 'packages/b/nested/d/jest.config.js']);
+    });
+
+    it('lists existing integration test config files', async () => {
+      const files = await jestConfigs.missing('integration');
+      expect(files).toEqual(['packages/b/jest.integration.config.js']);
+    });
+  });
+});

packages/kbn-test/src/jest/configs/jest_configs.ts

@@ -0,0 +1,85 @@
+/*
+ * 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.
+ */
+
+import path from 'path';
+import globby from 'globby';
+
+// @ts-ignore
+import { testMatch } from '../../../jest-preset';
+
+export const CONFIG_NAMES = {
+  unit: 'jest.config.js',
+  integration: 'jest.integration.config.js',
+};
+
+export class JestConfigs {
+  cwd: string;
+  roots: string[];
+  allFiles: string[] | undefined;
+
+  constructor(cwd: string, roots: string[]) {
+    this.cwd = cwd;
+    this.roots = roots;
+  }
+
+  async files(type: 'unit' | 'integration') {
+    if (!this.allFiles) {
+      this.allFiles = await globby(testMatch, {
+        gitignore: true,
+        cwd: this.cwd,
+      });
+    }
+
+    return this.allFiles.filter((f) =>
+      type === 'integration' ? f.includes('integration_tests') : !f.includes('integration_tests')
+    );
+  }
+
+  async expected(type: 'unit' | 'integration') {
+    const filesForType = await this.files(type);
+    const directories: Set<string> = new Set();
+
+    filesForType.forEach((file) => {
+      const root = this.roots.find((r) => file.startsWith(r));
+
+      if (root) {
+        const splitPath = file.substring(root.length).split(path.sep);
+
+        if (splitPath.length > 2) {
+          const name = splitPath[1];
+          directories.add([root, name].join(path.sep));
+        }
+      } else {
+        throw new Error(
+          `Test file (${file}) can not exist outside roots (${this.roots.join(
+            ', '
+          )}). Move it to a root or configure additional root.`
+        );
+      }
+    });
+
+    return [...directories].map((d) => [d, CONFIG_NAMES[type]].join(path.sep));
+  }
+
+  async existing(type: 'unit' | 'integration') {
+    return await globby(`**/${CONFIG_NAMES[type]}`, {
+      gitignore: true,
+      cwd: this.cwd,
+    });
+  }
+
+  async missing(type: 'unit' | 'integration') {
+    const expectedConfigs = await this.expected(type);
+    const existingConfigs = await this.existing(type);
+    return await expectedConfigs.filter((x) => !existingConfigs.includes(x));
+  }
+
+  async allMissing() {
+    return (await this.missing('unit')).concat(await this.missing('integration'));
+  }
+}