Method importMock

packages/jest-runtime/src/internals/EsmLoader.ts:1305–1323

(
    moduleName: string,
    moduleID: string,
    context: VMContext,
  )

  }

  private async importMock<T = unknown>(
    moduleName: string,
    moduleID: string,
    context: VMContext,
  ): Promise<T> {
    if (this.registries.hasModuleMock(moduleID)) {
      return this.registries.getModuleMock(moduleID) as T;
    }

    const factory = this.mockState.getEsmFactory(moduleID);
    if (factory) {
      const invokedFactory = (await factory()) as Record<string, unknown>;
      const module = syntheticFromExports(moduleName, context, invokedFactory);
      this.registries.setModuleMock(moduleID, module);
      return evaluateSyntheticModule(module) as T;
    }

    throw new Error('Attempting to import a mock without a factory');
  }

  private async importWasmModule(
    source: BufferSource,