Allow for jest.config.cts, add fixture and snapshots

Author: DerTimonius

packages/jest-cli/src/__tests__/args.test.ts

@@ -89,13 +89,13 @@ describe('check', () => {
 
   it('raises an exception if config is not a valid JSON string', () => {
     expect(() => check(argv({config: 'x:1'}))).toThrow(
-      'The --config option requires a JSON string literal, or a file path with one of these extensions: .js, .ts, .mjs, .cjs, .json',
+      'The --config option requires a JSON string literal, or a file path with one of these extensions: .js, .ts, .mjs, .cjs, .cts, .json',
     );
   });
 
   it('raises an exception if config is not a supported file type', () => {
     const message =
-      'The --config option requires a JSON string literal, or a file path with one of these extensions: .js, .ts, .mjs, .cjs, .json';
+      'The --config option requires a JSON string literal, or a file path with one of these extensions: .js, .ts, .mjs, .cjs, .cts, .json';
 
     expect(() => check(argv({config: 'jest.configjs'}))).toThrow(message);
     expect(() => check(argv({config: 'jest.config.exe'}))).toThrow(message);

packages/jest-cli/src/init/__tests__/__fixtures__/has-jest-config-file-cts/jest.config.cts

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+export default {};

packages/jest-cli/src/init/__tests__/__fixtures__/has-jest-config-file-cts/package.json

@@ -0,0 +1 @@
+{}

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

@@ -18,6 +18,15 @@ Object {
 }
 `;
 
+exports[`init has-jest-config-file-cts ask the user whether to override config or not user answered with "Yes" 1`] = `
+Object {
+  "initial": true,
+  "message": "It seems that you already have a jest configuration, do you want to override it?",
+  "name": "continue",
+  "type": "confirm",
+}
+`;
+
 exports[`init has-jest-config-file-js ask the user whether to override config or not user answered with "Yes" 1`] = `
 Object {
   "initial": true,
@@ -54,6 +63,67 @@ Object {
 }
 `;
 
+exports[`init project using jest.config.cts ask the user whether he wants to use Typescript or not user answered with "Yes" 1`] = `
+Array [
+  Object {
+    "initial": true,
+    "message": "Would you like to use Jest when running "test" script in "package.json"?",
+    "name": "scripts",
+    "type": "confirm",
+  },
+  Object {
+    "initial": false,
+    "message": "Would you like to use Typescript for the configuration file?",
+    "name": "useTypescript",
+    "type": "confirm",
+  },
+  Object {
+    "choices": Array [
+      Object {
+        "title": "node",
+        "value": "node",
+      },
+      Object {
+        "title": "jsdom (browser-like)",
+        "value": "jsdom",
+      },
+    ],
+    "initial": 0,
+    "message": "Choose the test environment that will be used for testing",
+    "name": "environment",
+    "type": "select",
+  },
+  Object {
+    "initial": false,
+    "message": "Do you want Jest to add coverage reports?",
+    "name": "coverage",
+    "type": "confirm",
+  },
+  Object {
+    "choices": Array [
+      Object {
+        "title": "v8",
+        "value": "v8",
+      },
+      Object {
+        "title": "babel",
+        "value": "babel",
+      },
+    ],
+    "initial": 0,
+    "message": "Which provider should be used to instrument code for coverage?",
+    "name": "coverageProvider",
+    "type": "select",
+  },
+  Object {
+    "initial": false,
+    "message": "Automatically clear mock calls, instances, contexts and results before every test?",
+    "name": "clearMocks",
+    "type": "confirm",
+  },
+]
+`;
+
 exports[`init project using jest.config.ts ask the user whether he wants to use Typescript or not user answered with "Yes" 1`] = `
 Array [
   Object {

packages/jest-config/src/constants.ts

@@ -15,11 +15,13 @@ export const JEST_CONFIG_EXT_CJS = '.cjs';
 export const JEST_CONFIG_EXT_MJS = '.mjs';
 export const JEST_CONFIG_EXT_JS = '.js';
 export const JEST_CONFIG_EXT_TS = '.ts';
+export const JEST_CONFIG_EXT_CTS = '.cts';
 export const JEST_CONFIG_EXT_JSON = '.json';
 export const JEST_CONFIG_EXT_ORDER = Object.freeze([
   JEST_CONFIG_EXT_JS,
   JEST_CONFIG_EXT_TS,
   JEST_CONFIG_EXT_MJS,
   JEST_CONFIG_EXT_CJS,
+  JEST_CONFIG_EXT_CTS,
   JEST_CONFIG_EXT_JSON,
 ]);

packages/jest-config/src/readConfigFileAndSetRootDir.ts

@@ -13,6 +13,7 @@ import type {Service} from 'ts-node';
 import type {Config} from '@jest/types';
 import {interopRequireDefault, requireOrImportModule} from 'jest-util';
 import {
+  JEST_CONFIG_EXT_CTS,
   JEST_CONFIG_EXT_JSON,
   JEST_CONFIG_EXT_TS,
   PACKAGE_JSON,
@@ -26,7 +27,7 @@ import {
 export default async function readConfigFileAndSetRootDir(
   configPath: string,
 ): Promise<Config.InitialOptions> {
-  const isTS = configPath.endsWith(JEST_CONFIG_EXT_TS);
+  const isTS = configPath.endsWith(JEST_CONFIG_EXT_TS || JEST_CONFIG_EXT_CTS);
   const isJSON = configPath.endsWith(JEST_CONFIG_EXT_JSON);
   let configObject;