allow bail setting to control when to bail out of a failing test run

CHANGELOG.md

@@ -34,6 +34,7 @@
 - `[jest-config]` Add `haste.computeSha1` option to compute the sha-1 of the files in the haste map ([#7345](https://github.com/facebook/jest/pull/7345))
 - `[expect]` `expect(Infinity).toBeCloseTo(Infinity)` Treats `Infinity` as equal in toBeCloseTo matcher ([#7405](https://github.com/facebook/jest/pull/7405))
 - `[jest-worker]` Add node worker-thread support to jest-worker ([#7408](https://github.com/facebook/jest/pull/7408))
+- `[jest-config]` Allow `bail` setting to be configured with a number allowing tests to abort after `n` of failures ([#7335](https://github.com/facebook/jest/pull/7335))
 
 ### Fixes
 

TestUtils.js

@@ -12,7 +12,7 @@
 import type {GlobalConfig, ProjectConfig} from 'types/Config';
 
 const DEFAULT_GLOBAL_CONFIG: GlobalConfig = {
-  bail: false,
+  bail: 0,
   changedFilesWithAncestor: false,
   changedSince: '',
   collectCoverage: false,

docs/CLI.md

@@ -97,7 +97,7 @@ When you run `jest` with an argument, that argument is treated as a regular expr
 
 ### `--bail`
 
-Alias: `-b`. Exit the test suite immediately upon the first failing test suite.
+Alias: `-b`. Exit the test suite immediately upon `n` number of failing test suite. Defaults to `1`.
 
 ### `--cache`
 

docs/Configuration.md

@@ -29,7 +29,7 @@ When using the `--config` option, the JSON file must not contain a "jest" key:
 
 ```json
 {
-  "bail": true,
+  "bail": 1,
   "verbose": true
 }
 ```
@@ -99,11 +99,11 @@ _Note: Core modules, like `fs`, are not mocked by default. They can be mocked ex
 
 _Note: Automocking has a performance cost most noticeable in large projects. See [here](troubleshooting.html#tests-are-slow-when-leveraging-automocking) for details and a workaround._
 
-### `bail` [boolean]
+### `bail` [number | boolean]
 
-Default: `false`
+Default: `0`
 
-By default, Jest runs all tests and produces all errors into the console upon completion. The bail config option can be used here to have Jest stop running tests after the first failure.
+By default, Jest runs all tests and produces all errors into the console upon completion. The bail config option can be used here to have Jest stop running tests after `n` failures. Setting bail to `true` is the same as setting bail to `1`.
 
 ### `browser` [boolean]
 

docs/WatchPlugins.md

@@ -1,7 +1,6 @@
 ---
 id: watch-plugins
 title: Watch Plugins
-original_id: watch-plugins
 ---
 
 The Jest watch plugin system provides a way to hook into specific parts of Jest and to define watch mode menu prompts that execute code on key press. Combined, these features allow you to develop interactive experiences custom for your workflow.
@@ -155,7 +154,7 @@ class MyWatchPlugin {
 
 For stability and safety reasons, only part of the global configuration keys can be updated with `updateConfigAndRun`. The current white list is as follows:
 
-- [`bail`](configuration.html#bail-boolean)
+- [`bail`](configuration.html#bail-number-boolean)
 - [`collectCoverage`](configuration.html#collectcoverage-boolean)
 - [`collectCoverageFrom`](configuration.html#collectcoveragefrom-array)
 - [`collectCoverageOnlyFrom`](configuration.html#collectcoverageonlyfrom-array)

e2e/__tests__/__snapshots__/show_config.test.js.snap

@@ -77,7 +77,7 @@ exports[`--showConfig outputs config info and exits 1`] = `
     }
   ],
   \\"globalConfig\\": {
-    \\"bail\\": false,
+    \\"bail\\": 0,
     \\"changedFilesWithAncestor\\": false,
     \\"collectCoverage\\": false,
     \\"collectCoverageFrom\\": null,

packages/jest-cli/src/TestScheduler.js

@@ -351,7 +351,10 @@ export default class TestScheduler {
     aggregatedResults: AggregatedResult,
     watcher: TestWatcher,
   ): Promise<void> {
-    if (this._globalConfig.bail && aggregatedResults.numFailedTests !== 0) {
+    if (
+      this._globalConfig.bail !== 0 &&
+      aggregatedResults.numFailedTests >= this._globalConfig.bail
+    ) {
       if (watcher.isWatchMode()) {
         watcher.setState({interrupted: true});
       } else {

packages/jest-cli/src/__tests__/TestScheduler.test.js

@@ -27,6 +27,10 @@ jest.mock('jest-runner-parallel', () => jest.fn(() => mockParallelRunner), {
   virtual: true,
 });
 
+beforeEach(() => {
+  mockSerialRunner.runTests.mockClear();
+});
+
 test('config for reporters supports `default`', () => {
   const undefinedReportersScheduler = new TestScheduler(
     {
@@ -116,3 +120,63 @@ test('schedule tests run in serial if the runner flags them', async () => {
   expect(mockSerialRunner.runTests).toHaveBeenCalled();
   expect(mockSerialRunner.runTests.mock.calls[0][5].serial).toBeTruthy();
 });
+
+test('should bail after `n` failures', async () => {
+  const scheduler = new TestScheduler({bail: 2}, {});
+  const test = {
+    context: {
+      config: {
+        rootDir: './',
+        runner: 'jest-runner-serial',
+      },
+      hasteFS: {
+        matchFiles: jest.fn(() => []),
+      },
+    },
+    path: './test/path.js',
+  };
+
+  const tests = [test];
+  const setState = jest.fn();
+  await scheduler.scheduleTests(tests, {
+    isInterrupted: jest.fn(),
+    isWatchMode: () => true,
+    setState,
+  });
+  await mockSerialRunner.runTests.mock.calls[0][3](test, {
+    numFailingTests: 2,
+    snapshot: {},
+    testResults: [{}],
+  });
+  expect(setState).toBeCalledWith({interrupted: true});
+});
+
+test('should not bail if less than `n` failures', async () => {
+  const scheduler = new TestScheduler({bail: 2}, {});
+  const test = {
+    context: {
+      config: {
+        rootDir: './',
+        runner: 'jest-runner-serial',
+      },
+      hasteFS: {
+        matchFiles: jest.fn(() => []),
+      },
+    },
+    path: './test/path.js',
+  };
+
+  const tests = [test];
+  const setState = jest.fn();
+  await scheduler.scheduleTests(tests, {
+    isInterrupted: jest.fn(),
+    isWatchMode: () => true,
+    setState,
+  });
+  await mockSerialRunner.runTests.mock.calls[0][3](test, {
+    numFailingTests: 1,
+    snapshot: {},
+    testResults: [{}],
+  });
+  expect(setState).not.toBeCalled();
+});

packages/jest-cli/src/cli/args.js

@@ -85,8 +85,8 @@ export const options = {
   bail: {
     alias: 'b',
     default: undefined,
-    description: 'Exit the test suite immediately upon the first failing test.',
-    type: 'boolean',
+    description:
+      'Exit the test suite immediately after `n` number of failing tests.',
   },
   browser: {
     default: undefined,

packages/jest-cli/src/lib/__tests__/__snapshots__/init.test.js.snap

@@ -26,8 +26,8 @@ module.exports = {
   // All imported modules in your tests should be mocked automatically
   // automock: false,
 
-  // Stop running tests after the first failure
-  // bail: false,
+  // Stop running tests after \`n\` failures
+  // bail: 0,
 
   // Respect \\"browser\\" field in package.json when resolving modules
   // browser: false,

packages/jest-cli/src/lib/update_global_config.js

@@ -66,8 +66,10 @@ export default (globalConfig: GlobalConfig, options: Options): GlobalConfig => {
     !newConfig.testNamePattern &&
     !newConfig.testPathPattern;
 
-  if (options.bail !== undefined) {
-    newConfig.bail = options.bail || false;
+  if (typeof options.bail === 'boolean') {
+    newConfig.bail = options.bail ? 1 : 0;
+  } else if (options.bail !== undefined) {
+    newConfig.bail = options.bail;
   }
 
   if (options.changedSince !== undefined) {

packages/jest-config/src/Defaults.js

@@ -17,7 +17,7 @@ const NODE_MODULES_REGEXP = replacePathSepForRegex(NODE_MODULES);
 
 export default ({
   automock: false,
-  bail: false,
+  bail: 0,
   browser: false,
   cache: true,
   cacheDirectory: getCacheDirectory(),

packages/jest-config/src/Descriptions.js

@@ -9,7 +9,7 @@
 
 export default ({
   automock: 'All imported modules in your tests should be mocked automatically',
-  bail: 'Stop running tests after the first failure',
+  bail: 'Stop running tests after `n` failures',
   browser: 'Respect "browser" field in package.json when resolving modules',
   cacheDirectory:
     'The directory where Jest should store its cached dependency information',

packages/jest-config/src/ValidConfig.js

@@ -17,7 +17,7 @@ const NODE_MODULES_REGEXP = replacePathSepForRegex(NODE_MODULES);
 
 export default ({
   automock: false,
-  bail: false,
+  bail: (multipleValidOptions(false, 0): any),
   browser: false,
   cache: true,
   cacheDirectory: '/tmp/user/jest',

packages/jest-config/src/normalize.js

@@ -617,8 +617,21 @@ export default function normalize(options: InitialOptions, argv: Argv) {
 
         break;
       }
+      case 'bail': {
+        if (typeof options[key] === 'boolean') {
+          value = options[key] ? 1 : 0;
+        } else if (typeof options[key] === 'string') {
+          value = 1;
+          // If Jest is invoked as `jest --bail someTestPattern` then need to
+          // move the pattern from the `bail` configuration and into `argv._`
+          // to be processed as an extra parameter
+          argv._.push(options[key]);
+        } else {
+          value = options[key];
+        }
+        break;
+      }
       case 'automock':
-      case 'bail':
       case 'browser':
       case 'cache':
       case 'changedSince':

packages/jest-validate/src/__tests__/fixtures/jestConfig.js

@@ -22,7 +22,7 @@ const NODE_MODULES_REGEXP = replacePathSepForRegex(NODE_MODULES);
 
 const defaultConfig = {
   automock: false,
-  bail: false,
+  bail: 0,
   browser: false,
   cacheDirectory: path.join(os.tmpdir(), 'jest'),
   clearMocks: false,
@@ -62,7 +62,7 @@ const defaultConfig = {
 
 const validConfig = {
   automock: false,
-  bail: false,
+  bail: 0,
   browser: false,
   cache: true,
   cacheDirectory: '/tmp/user/jest',

types/Argv.js

@@ -13,7 +13,7 @@ export type Argv = {|
   $0: string,
   all: boolean,
   automock: boolean,
-  bail: boolean,
+  bail: boolean | number,
   browser: boolean,
   cache: boolean,
   cacheDirectory: string,

types/Config.js

@@ -24,7 +24,7 @@ export type ConfigGlobals = Object;
 
 export type DefaultOptions = {|
   automock: boolean,
-  bail: boolean,
+  bail: number,
   browser: boolean,
   cache: boolean,
   cacheDirectory: Path,
@@ -92,7 +92,7 @@ export type DefaultOptions = {|
 
 export type InitialOptions = {
   automock?: boolean,
-  bail?: boolean,
+  bail?: boolean | number,
   browser?: boolean,
   cache?: boolean,
   cacheDirectory?: Path,
@@ -190,7 +190,7 @@ export type InitialOptions = {
 export type SnapshotUpdateState = 'all' | 'new' | 'none';
 
 export type GlobalConfig = {|
-  bail: boolean,
+  bail: number,
   changedSince: string,
   changedFilesWithAncestor: boolean,
   collectCoverage: boolean,