Function makeLoader

packages/jest-runtime/src/internals/__tests__/CjsLoader.test.ts:32–83

(overrides: Partial<Stubs> = {})

};

function makeLoader(overrides: Partial<Stubs> = {}) {
  const logFormattedReferenceError = jest.fn();
  const stubs: Stubs = {
    coreModule: {
      require: jest.fn(),
    } as unknown as jest.Mocked<CoreModuleProvider>,
    environment: {
      global: {JSON} as unknown as JestEnvironment['global'],
    } as JestEnvironment,
    executor: {
      exec: jest.fn(() => 'loaded' as const),
      getCurrentlyExecutingManualMock: jest.fn(() => null),
      mainModule: null,
      resetMainModule: jest.fn(),
    } as unknown as jest.Mocked<ModuleExecutor>,
    logFormattedReferenceError,
    mockState: {
      getCjsModuleId: jest.fn(() => 'id'),
      isExplicitlyUnmocked: jest.fn(() => false),
    } as unknown as jest.Mocked<MockState>,
    registries: {
      getActiveCjsRegistry: jest.fn(() => new Map()),
      getActiveEsmRegistry: jest.fn(() => new Map()),
    } as unknown as jest.Mocked<ModuleRegistries>,
    requireEsm: jest.fn() as any,
    resolution: {
      getCjsMockModule: jest.fn(() => null),
      getModule: jest.fn(() => null),
      isCoreModule: jest.fn(() => false),
      resolveCjs: jest.fn(() => '/m.js'),
      shouldLoadAsEsm: jest.fn(() => false),
    } as unknown as jest.Mocked<Resolution>,
    testState: new TestState(logFormattedReferenceError),
    transformCache: {
      transformJson: jest.fn((_path, _opts) => '{"answer":42}'),
    } as unknown as jest.Mocked<TransformCache>,
    ...overrides,
  };
  const loader = new CjsLoader({
    coreModule: stubs.coreModule,
    environment: stubs.environment,
    executor: stubs.executor,
    logFormattedReferenceError: stubs.logFormattedReferenceError,
    mockState: stubs.mockState,
    registries: stubs.registries,
    requireEsm: stubs.requireEsm,
    resolution: stubs.resolution,
    testState: stubs.testState,
    transformCache: stubs.transformCache,
  });
  return {loader, stubs};
}

describe('CjsLoader.requireModule', () => {
  test('routes core modules to coreModule.require', () => {