Function makeLoader

packages/jest-runtime/src/internals/__tests__/EsmLoader.test.ts:40–104

(overrides: Partial<Stubs> = {})

};

function makeLoader(overrides: Partial<Stubs> = {}) {
  const context = createContext({});
  const esmRegistry = new Map<string, unknown>();
  const logFormattedReferenceError = jest.fn();
  const stubs: Stubs = {
    cjsExportsCache: {
      getExportsOf: jest.fn(() => []),
    } as unknown as jest.Mocked<CjsExportsCache>,
    coreModule: {
      require: jest.fn(),
    } as unknown as jest.Mocked<CoreModuleProvider>,
    environment: {
      getVmContext: () => context,
    } as unknown as JestEnvironment,
    fileCache: {
      readFileBuffer: jest.fn(),
    } as unknown as jest.Mocked<FileCache>,
    jestGlobals: {
      esmGlobalsModule: jest.fn(),
      jestObjectFor: jest.fn(),
    } as unknown as jest.Mocked<JestGlobals>,
    logFormattedReferenceError,
    mockState: {
      getEsmFactory: jest.fn(() => undefined),
      getEsmModuleId: jest.fn((from, name) => `${from}\0${name}`),
      shouldMockEsmSync: jest.fn((_from, name) => ({
        moduleID: name,
        shouldMock: false,
      })),
    } as unknown as jest.Mocked<MockState>,
    registries: {
      getActiveEsmRegistry: jest.fn(() => esmRegistry),
      getModuleMock: jest.fn(),
      setModuleMock: jest.fn(),
    } as unknown as jest.Mocked<ModuleRegistries>,
    requireModuleOrMock: jest.fn() as any,
    resolution: {
      isCoreModule: jest.fn(() => false),
      resolveEsm: jest.fn((_from, name) => name),
    } as unknown as jest.Mocked<Resolution>,
    shouldLoadAsEsm: jest.fn(() => true),
    testState: new TestState(logFormattedReferenceError),
    transformCache: {
      canTransformSync: jest.fn(() => true),
      hasMutex: jest.fn(() => false),
      transform: jest.fn(),
    } as unknown as jest.Mocked<TransformCache>,
    ...overrides,
  };
  const loader = new EsmLoader({
    cjsExportsCache: stubs.cjsExportsCache,
    coreModule: stubs.coreModule,
    environment: stubs.environment,
    fileCache: stubs.fileCache,
    jestGlobals: stubs.jestGlobals,
    mockState: stubs.mockState,
    registries: stubs.registries,
    requireModuleOrMock: stubs.requireModuleOrMock,