为什么Jest正在执行不在范围内的代码？

Question

在编写中间件测试时：

export const myMiddleware = ({getState, dispatch}) => next => action => {

  console.log("action.type:", action.type) // 'NOTHING'
  console.log("action.type compare:", action.type=== 'targetedAction') // this is false
  
  next(action)

  if(action.type === 'targetedAction') {
  
    console.log("in if:" )
    const state = getState()

    const data = getData(state)

    data.forEach( => { /*do something */ }) )

  }

}

笑话代码是：

it('should pass the intercepted action to next', () => {

  const fakeNext = {fakeMethod(){return true}};
  const spy = jest.spyOn(fakeNext,'fakeMethod');
  const fakeStore = {
    dispatch: {},
    getState: jest.fn()
  };

  const action = { type: 'NOTHING' };
 
  myMiddleware(fakeStore)(spy)(action);
  expect(spy).toHaveBeenCalledWith(action)
  
});

当我尝试运行测试时，它将尝试执行if条件内的代码并引发错误。由于我的测试仅是要确保next（action）已执行且action.type与预期不符，因此它不应该绕过if条件并通过测试吗？

当前，它在执行getData（state）时引发错误。