add slow test threshold option

CHANGELOG.md

@@ -12,6 +12,7 @@
 - `[jest-config]` [**BREAKING**] Set default display name color based on runner ([#8689](https://github.com/facebook/jest/pull/8689))
 - `[jest-config]` Merge preset globals with project globals ([#9027](https://github.com/facebook/jest/pull/9027))
 - `[jest-config]` Support `.cjs` config files ([#9291](https://github.com/facebook/jest/pull/9291))
+- `[jest-config, jest-reporter, jest-runner]` Add `slowTestThreshold` configuration option ([#9366](https://github.com/facebook/jest/pull/9366))
 - `[jest-core]` Support reporters as default exports ([#9161](https://github.com/facebook/jest/pull/9161))
 - `[jest-diff]` Add options for colors and symbols ([#8841](https://github.com/facebook/jest/pull/8841))
 - `[jest-diff]` [**BREAKING**] Export as ECMAScript module ([#8873](https://github.com/facebook/jest/pull/8873))

TestUtils.ts

@@ -106,6 +106,7 @@ const DEFAULT_PROJECT_CONFIG: Config.ProjectConfig = {
   setupFilesAfterEnv: [],
   skipFilter: false,
   skipNodeResolution: false,
+  slowTestThreshold: 5,
   snapshotResolver: null,
   snapshotSerializers: [],
   testEnvironment: 'node',

docs/Configuration.md

@@ -779,6 +779,12 @@ Example `jest.setup.js` file
 jest.setTimeout(10000); // in milliseconds
 ```
 
+### `slowTestThreshold` [number]
+
+Default: `5`
+
+A number of seconds after which a test is considered as slow and reported as such in the results.
+
 ### `snapshotResolver` [string]
 
 Default: `undefined`

e2e/__tests__/__snapshots__/showConfig.test.ts.snap

@@ -50,6 +50,7 @@ exports[`--showConfig outputs config info and exits 1`] = `
       "setupFiles": [],
       "setupFilesAfterEnv": [],
       "skipFilter": false,
+      "slowTestThreshold": 5,
       "snapshotSerializers": [],
       "testEnvironment": "<<REPLACED_JEST_PACKAGES_DIR>>/jest-environment-jsdom/build/index.js",
       "testEnvironmentOptions": {},

packages/jest-config/src/Defaults.ts

@@ -52,6 +52,7 @@ const defaultOptions: Config.DefaultOptions = {
   setupFiles: [],
   setupFilesAfterEnv: [],
   skipFilter: false,
+  slowTestThreshold: 5,
   snapshotSerializers: [],
   testEnvironment: 'jest-environment-jsdom',
   testEnvironmentOptions: {},

packages/jest-config/src/Descriptions.ts

@@ -66,6 +66,8 @@ const descriptions: {[key in keyof Config.InitialOptions]: string} = {
     'The paths to modules that run some code to configure or set up the testing environment before each test',
   setupFilesAfterEnv:
     'A list of paths to modules that run some code to configure or set up the testing framework before each test',
+  slowTestThreshold:
+    'A number of seconds after which a test is considered as slow and reported as such in the results.',
   snapshotSerializers:
     'A list of paths to snapshot serializer modules Jest should use for snapshot testing',
   testEnvironment: 'The test environment that will be used for testing',

packages/jest-config/src/ValidConfig.ts

@@ -99,6 +99,7 @@ const initialOptions: Config.InitialOptions = {
   silent: true,
   skipFilter: false,
   skipNodeResolution: false,
+  slowTestThreshold: 5,
   snapshotResolver: '<rootDir>/snapshotResolver.js',
   snapshotSerializers: ['my-serializer-module'],
   testEnvironment: 'jest-environment-jsdom',

packages/jest-config/src/index.ts

@@ -199,6 +199,7 @@ const groupOptions = (
     setupFilesAfterEnv: options.setupFilesAfterEnv,
     skipFilter: options.skipFilter,
     skipNodeResolution: options.skipNodeResolution,
+    slowTestThreshold: options.slowTestThreshold,
     snapshotResolver: options.snapshotResolver,
     snapshotSerializers: options.snapshotSerializers,
     testEnvironment: options.testEnvironment,

packages/jest-config/src/normalize.ts

@@ -870,6 +870,7 @@ export default function normalize(
       case 'silent':
       case 'skipFilter':
       case 'skipNodeResolution':
+      case 'slowTestThreshold':
       case 'testEnvironment':
       case 'testEnvironmentOptions':
       case 'testFailureExitCode':

packages/jest-core/src/lib/__tests__/__snapshots__/log_debug_messages.test.ts.snap

@@ -45,6 +45,7 @@ exports[`prints the config object 1`] = `
     "setupFilesAfterEnv": [],
     "skipFilter": false,
     "skipNodeResolution": false,
+    "slowTestThreshold": 5,
     "snapshotResolver": null,
     "snapshotSerializers": [],
     "testEnvironment": "node",

packages/jest-reporters/src/__tests__/get_result_header.test.js

@@ -11,9 +11,28 @@ const terminalLink = require('terminal-link');
 
 jest.mock('terminal-link', () => jest.fn(() => 'wannabehyperlink'));
 
+const endTime = 1577717671160;
+const testTime = 5500;
+
 const testResult = {
   testFilePath: '/foo',
 };
+const testResultSlow = {
+  perfStats: {
+    end: endTime,
+    slow: true,
+    start: endTime - testTime,
+  },
+  testFilePath: '/foo',
+};
+const testResultFast = {
+  perfStats: {
+    end: endTime,
+    slow: false,
+    start: endTime - testTime,
+  },
+  testFilePath: '/foo',
+};
 
 const globalConfig = makeGlobalConfig();
 
@@ -36,3 +55,15 @@ test('should render the terminal link', () => {
 
   expect(result).toContain('wannabehyperlink');
 });
+
+test('should display test time for slow test', () => {
+  const result = getResultHeader(testResultSlow, globalConfig);
+
+  expect(result).toContain(`${testTime / 1000}s`);
+});
+
+test('should not display test time for fast test ', () => {
+  const result = getResultHeader(testResultFast, globalConfig);
+
+  expect(result).not.toContain(`${testTime / 1000}s`);
+});

packages/jest-reporters/src/get_result_header.ts

@@ -41,12 +41,11 @@ export default (
   const status =
     result.numFailingTests > 0 || result.testExecError ? FAIL : PASS;
 
-  const runTime = result.perfStats
-    ? (result.perfStats.end - result.perfStats.start) / 1000
-    : null;
-
   const testDetail = [];
-  if (runTime !== null && runTime > 5) {
+
+  if (result.perfStats && result.perfStats.slow) {
+    const runTime = (result.perfStats.end - result.perfStats.start) / 1000;
+
     testDetail.push(LONG_TEST_COLOR(runTime + 's'));
   }
 

packages/jest-runner/src/runTest.ts

@@ -259,7 +259,12 @@ async function runTestInternal(
       result.numPendingTests +
       result.numTodoTests;
 
-    result.perfStats = {end: Date.now(), start};
+    const end = Date.now();
+    result.perfStats = {
+      end,
+      slow: (end - start) / 1000 > config.slowTestThreshold,
+      start,
+    };
     result.testFilePath = path;
     result.console = testConsole.getBuffer();
     result.skipped = testCount === result.numPendingTests;

packages/jest-test-result/src/__tests__/formatTestResults.test.ts

@@ -19,7 +19,7 @@ describe('formatTestResults', () => {
     testResults: [
       {
         numFailingTests: 0,
-        perfStats: {end: 2, start: 1},
+        perfStats: {end: 2, slow: false, start: 1},
         // @ts-ignore
         testResults: [assertion],
       },

packages/jest-test-result/src/helpers.ts

@@ -58,6 +58,7 @@ export const buildFailureTestResult = (
   openHandles: [],
   perfStats: {
     end: 0,
+    slow: false,
     start: 0,
   },
   skipped: false,
@@ -155,6 +156,7 @@ export const createEmptyTestResult = (): TestResult => ({
   openHandles: [],
   perfStats: {
     end: 0,
+    slow: false,
     start: 0,
   },
   skipped: false,

packages/jest-test-result/src/types.ts

@@ -121,6 +121,7 @@ export type TestResult = {
   openHandles: Array<Error>;
   perfStats: {
     end: Milliseconds;
+    slow: boolean;
     start: Milliseconds;
   };
   skipped: boolean;

packages/jest-transform/src/__tests__/__snapshots__/script_transformer.test.js.snap

@@ -44,6 +44,7 @@ Object {
     "setupFilesAfterEnv": Array [],
     "skipFilter": false,
     "skipNodeResolution": false,
+    "slowTestThreshold": 5,
     "snapshotResolver": null,
     "snapshotSerializers": Array [],
     "testEnvironment": "node",
@@ -222,7 +223,7 @@ exports[`ScriptTransformer uses multiple preprocessors 1`] = `
 const TRANSFORMED = {
   filename: '/fruits/banana.js',
   script: 'module.exports = "banana";',
-  config: '{"automock":false,"browser":false,"cache":true,"cacheDirectory":"/cache/","clearMocks":false,"coveragePathIgnorePatterns":[],"cwd":"/test_root_dir/","detectLeaks":false,"detectOpenHandles":false,"errorOnDeprecated":false,"extraGlobals":[],"filter":null,"forceCoverageMatch":[],"globalSetup":null,"globalTeardown":null,"globals":{},"haste":{"providesModuleNodeModules":[]},"moduleDirectories":[],"moduleFileExtensions":["js"],"moduleLoader":"/test_module_loader_path","moduleNameMapper":[],"modulePathIgnorePatterns":[],"modulePaths":[],"name":"test","prettierPath":"prettier","resetMocks":false,"resetModules":false,"resolver":null,"restoreMocks":false,"rootDir":"/","roots":[],"runner":"jest-runner","setupFiles":[],"setupFilesAfterEnv":[],"skipFilter":false,"skipNodeResolution":false,"snapshotResolver":null,"snapshotSerializers":[],"testEnvironment":"node","testEnvironmentOptions":{},"testLocationInResults":false,"testMatch":[],"testPathIgnorePatterns":[],"testRegex":["\\\\.test\\\\.js$"],"testRunner":"jest-jasmine2","testURL":"http://localhost","timers":"real","transform":[["^.+\\\\.js$","test_preprocessor"],["^.+\\\\.css$","css-preprocessor"]],"transformIgnorePatterns":["/node_modules/"],"unmockedModulePathPatterns":null,"watchPathIgnorePatterns":[]}',
+  config: '{"automock":false,"browser":false,"cache":true,"cacheDirectory":"/cache/","clearMocks":false,"coveragePathIgnorePatterns":[],"cwd":"/test_root_dir/","detectLeaks":false,"detectOpenHandles":false,"errorOnDeprecated":false,"extraGlobals":[],"filter":null,"forceCoverageMatch":[],"globalSetup":null,"globalTeardown":null,"globals":{},"haste":{"providesModuleNodeModules":[]},"moduleDirectories":[],"moduleFileExtensions":["js"],"moduleLoader":"/test_module_loader_path","moduleNameMapper":[],"modulePathIgnorePatterns":[],"modulePaths":[],"name":"test","prettierPath":"prettier","resetMocks":false,"resetModules":false,"resolver":null,"restoreMocks":false,"rootDir":"/","roots":[],"runner":"jest-runner","setupFiles":[],"setupFilesAfterEnv":[],"skipFilter":false,"skipNodeResolution":false,"slowTestThreshold":5,"snapshotResolver":null,"snapshotSerializers":[],"testEnvironment":"node","testEnvironmentOptions":{},"testLocationInResults":false,"testMatch":[],"testPathIgnorePatterns":[],"testRegex":["\\\\.test\\\\.js$"],"testRunner":"jest-jasmine2","testURL":"http://localhost","timers":"real","transform":[["^.+\\\\.js$","test_preprocessor"],["^.+\\\\.css$","css-preprocessor"]],"transformIgnorePatterns":["/node_modules/"],"unmockedModulePathPatterns":null,"watchPathIgnorePatterns":[]}',
 };
 `;
 
@@ -239,7 +240,7 @@ exports[`ScriptTransformer uses the supplied preprocessor 1`] = `
 const TRANSFORMED = {
   filename: '/fruits/banana.js',
   script: 'module.exports = "banana";',
-  config: '{"automock":false,"browser":false,"cache":true,"cacheDirectory":"/cache/","clearMocks":false,"coveragePathIgnorePatterns":[],"cwd":"/test_root_dir/","detectLeaks":false,"detectOpenHandles":false,"errorOnDeprecated":false,"extraGlobals":[],"filter":null,"forceCoverageMatch":[],"globalSetup":null,"globalTeardown":null,"globals":{},"haste":{"providesModuleNodeModules":[]},"moduleDirectories":[],"moduleFileExtensions":["js"],"moduleLoader":"/test_module_loader_path","moduleNameMapper":[],"modulePathIgnorePatterns":[],"modulePaths":[],"name":"test","prettierPath":"prettier","resetMocks":false,"resetModules":false,"resolver":null,"restoreMocks":false,"rootDir":"/","roots":[],"runner":"jest-runner","setupFiles":[],"setupFilesAfterEnv":[],"skipFilter":false,"skipNodeResolution":false,"snapshotResolver":null,"snapshotSerializers":[],"testEnvironment":"node","testEnvironmentOptions":{},"testLocationInResults":false,"testMatch":[],"testPathIgnorePatterns":[],"testRegex":["\\\\.test\\\\.js$"],"testRunner":"jest-jasmine2","testURL":"http://localhost","timers":"real","transform":[["^.+\\\\.js$","test_preprocessor"]],"transformIgnorePatterns":["/node_modules/"],"unmockedModulePathPatterns":null,"watchPathIgnorePatterns":[]}',
+  config: '{"automock":false,"browser":false,"cache":true,"cacheDirectory":"/cache/","clearMocks":false,"coveragePathIgnorePatterns":[],"cwd":"/test_root_dir/","detectLeaks":false,"detectOpenHandles":false,"errorOnDeprecated":false,"extraGlobals":[],"filter":null,"forceCoverageMatch":[],"globalSetup":null,"globalTeardown":null,"globals":{},"haste":{"providesModuleNodeModules":[]},"moduleDirectories":[],"moduleFileExtensions":["js"],"moduleLoader":"/test_module_loader_path","moduleNameMapper":[],"modulePathIgnorePatterns":[],"modulePaths":[],"name":"test","prettierPath":"prettier","resetMocks":false,"resetModules":false,"resolver":null,"restoreMocks":false,"rootDir":"/","roots":[],"runner":"jest-runner","setupFiles":[],"setupFilesAfterEnv":[],"skipFilter":false,"skipNodeResolution":false,"slowTestThreshold":5,"snapshotResolver":null,"snapshotSerializers":[],"testEnvironment":"node","testEnvironmentOptions":{},"testLocationInResults":false,"testMatch":[],"testPathIgnorePatterns":[],"testRegex":["\\\\.test\\\\.js$"],"testRunner":"jest-jasmine2","testURL":"http://localhost","timers":"real","transform":[["^.+\\\\.js$","test_preprocessor"]],"transformIgnorePatterns":["/node_modules/"],"unmockedModulePathPatterns":null,"watchPathIgnorePatterns":[]}',
 };
 `;
 

packages/jest-types/src/Config.ts

@@ -65,6 +65,7 @@ export type DefaultOptions = {
   setupFiles: Array<Path>;
   setupFilesAfterEnv: Array<Path>;
   skipFilter: boolean;
+  slowTestThreshold: number;
   snapshotSerializers: Array<Path>;
   testEnvironment: string;
   testEnvironmentOptions: Record<string, any>;
@@ -174,6 +175,7 @@ export type InitialOptions = Partial<{
   silent: boolean;
   skipFilter: boolean;
   skipNodeResolution: boolean;
+  slowTestThreshold: number;
   snapshotResolver: Path;
   snapshotSerializers: Array<Path>;
   errorOnDeprecated: boolean;
@@ -336,6 +338,7 @@ export type ProjectConfig = {
   setupFilesAfterEnv: Array<Path>;
   skipFilter: boolean;
   skipNodeResolution?: boolean;
+  slowTestThreshold: number;
   snapshotResolver?: Path;
   snapshotSerializers: Array<Path>;
   testEnvironment: string;