feat: jest preset

Author: huafu

e2e/__templates__/default/jest.config.js

@@ -1,9 +1,5 @@
 module.exports = {
-  transform: {
-    '^.+\\.tsx?$': 'ts-jest',
-  },
-  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.[jt]sx?$',
-  moduleFileExtensions: ['ts', 'js'],
+  preset: 'ts-jest',
   testEnvironment: 'node',
   globals: { 'ts-jest': { tsConfig: {} } },
 };

e2e/__templates__/with-babel-6/jest.config.js

@@ -1,9 +1,5 @@
 module.exports = {
-  transform: {
-    '^.+\\.tsx?$': 'ts-jest',
-  },
-  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.[jt]sx?$',
-  moduleFileExtensions: ['ts', 'js'],
+  preset: 'ts-jest',
   testEnvironment: 'node',
   globals: { 'ts-jest': { tsConfig: {}, babelJest: true } },
 };

e2e/__templates__/with-babel-7/jest.config.js

@@ -1,9 +1,5 @@
 module.exports = {
-  transform: {
-    '^.+\\.tsx?$': 'ts-jest',
-  },
-  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.[jt]sx?$',
-  moduleFileExtensions: ['ts', 'js'],
+  preset: 'ts-jest',
   testEnvironment: 'node',
   globals: { 'ts-jest': { tsConfig: {}, babelJest: true } },
 };

e2e/__templates__/with-jest-22/jest.config.js

@@ -1,9 +1,5 @@
 module.exports = {
-  transform: {
-    '^.+\\.tsx?$': 'ts-jest',
-  },
-  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.[jt]sx?$',
-  moduleFileExtensions: ['ts', 'js'],
+  preset: 'ts-jest',
   testEnvironment: 'node',
   globals: { 'ts-jest': { tsConfig: {} } },
 };

jest-preset.js

@@ -0,0 +1,3 @@
+const createJestPreset = require('./dist/utils/create-jest-preset').default;
+
+module.exports = createJestPreset();

src/__snapshots__/ts-jest-transformer.spec.ts.snap

@@ -28,4 +28,4 @@ var lower_1 = __importDefault(require(\\"./lower\\"));describe('hello', function
 //# sourceMappingURL=data:application/json;charset=utf-8;base64,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"
 `;
 
-exports[`process stringifyContentPathRegex should create a module with stringified content as export 1`] = `"module.exports=\\"\\\\n<div>\\\\n  <span>some text with \`backtilt\`</span>\\\\n</div>\\\\n\\""`;
+exports[`process stringifyContentPathRegex should create a module with stringified content as export 1`] = `"module.exports=\\"\\\\n<div>\\\\n  <span>some text with \`backtick\`</span>\\\\n</div>\\\\n\\""`;

src/index.spec.ts

@@ -0,0 +1,16 @@
+import * as tsJest from './index';
+
+describe('ts-jest', () => {
+  it('should export a `createTransformer` function', () => {
+    expect(typeof tsJest.createTransformer).toBe('function');
+  });
+  it('should export a `process` function', () => {
+    expect(typeof tsJest.process).toBe('function');
+  });
+  it('should export a `getCacheKey` function', () => {
+    expect(typeof tsJest.getCacheKey).toBe('function');
+  });
+  it('should export a `jestPreset` object', () => {
+    expect(typeof tsJest.jestPreset).toBe('object');
+  });
+});

src/index.ts

@@ -1,4 +1,5 @@
 import TsJestTransformer from './ts-jest-transformer';
+import createJestPreset from './utils/create-jest-preset';
 
 // TODO: allow a `TsJestGlobalOptions` object to be give to createTransformer()
 // so that presets could totally customize and extend the transfomer;
@@ -13,4 +14,6 @@ function getCacheKey(...args: any[]): any {
   return (createTransformer() as any).getCacheKey(...args);
 }
 
-export { createTransformer, tsProcess as process, getCacheKey };
+const jestPreset = createJestPreset();
+
+export { createTransformer, tsProcess as process, getCacheKey, jestPreset };

src/types.ts

@@ -76,3 +76,7 @@ export interface TsJestHooksMap {
     result: string | jest.TransformedSource,
   ): string | jest.TransformedSource | void;
 }
+
+export interface CreateJestPresetOptions {
+  allowJs?: boolean;
+}

src/utils/create-jest-preset.ts

@@ -0,0 +1,22 @@
+import { defaults } from 'jest-config';
+import { CreateJestPresetOptions } from '../types';
+
+// TODO: find out if tsconfig that we'll use contains `allowJs`
+// and change the transform so that it also uses ts-jest for js files
+
+export default function createJestPreset({
+  allowJs = false,
+}: CreateJestPresetOptions = {}) {
+  return {
+    transform: {
+      ...defaults.transform,
+      [allowJs ? '^.+\\.[tj]sx?$' : '^.+\\.tsx?$']: 'ts-jest',
+    },
+    testMatch: [
+      ...defaults.testMatch,
+      '**/__tests__/**/*.ts?(x)',
+      '**/?(*.)+(spec|test).ts?(x)',
+    ],
+    moduleFileExtensions: [...defaults.moduleFileExtensions, 'ts', 'tsx'],
+  };
+}