Jestjs Promise.resolve返回未定义的jest模拟函数

Jestjs Promise.resolve返回未定义的jest模拟函数,jestjs,enzyme,Jestjs,Enzyme,我有一个函数,它进行API调用,并根据第一个API调用返回的内容进行第二个API调用。但是第一个API总是返回未定义的 getTotalCount = async () => { const { showCountCallBack, showCount } = this.props; try { const response = await showCount(); const count = isEmpty(response.result);

我有一个函数,它进行API调用,并根据第一个API调用返回的内容进行第二个API调用。但是第一个API总是返回未定义的

getTotalCount = async () => {
    const { showCountCallBack, showCount } = this.props;
    try {
      const response = await showCount();

      const count = isEmpty(response.result);

      if (count) {
        console.log(" success");
      } else {
        showCountCallBack({ ...this.state });
      }
    } catch (e) {
      console.log("error");
    }
  };

description(“组件”),()=>{
让浅显的成分;
让浅薄的成分站起来;
const showCountMock=jest.fn(()=>Promise.resolve({result:[]}));
const showCountCallBackMock=jest.fn(()=>Promise.resolve({result:[]}));
在每个之前(()=>{
showCountMock.mockReset();
shallowComponent=shallowWithTheme(
);
shallowComponentInstance=shallowComponent.instance();
});
它(“视图映射”,()=>{
shallowComponentInstance.getTotalCount();
期望(showCountMock)。已被催收时间(1);
预期(showCountCallBackMock)。已被催收时间(1);
});
});

挣扎了几个小时之后。我已经找到了原因。导致此问题的原因是
mockReset

它还会重置返回值。所以我刚刚从代码中删除了
mockReset
。最好在此处使用
mockClear

describe("component", () => {
  let shallowComponent;
  let shallowComponentInstance;
  const showCountMock = jest.fn(() => Promise.resolve({ result: [] }));

  const showCountCallBackMock = jest.fn(() => Promise.resolve({ result: [] }));

  beforeEach(() => {
    showCountMock.mockReset();

    shallowComponent = shallowWithTheme(
      <Component
        showCount={showCountMock}
        showCountCallBack={showCountCallBackMock}
      />
    );
    shallowComponentInstance = shallowComponent.instance();
  });

  it("viewMapping", () => {
    shallowComponentInstance.getTotalCount();
    expect(showCountMock).toHaveBeenCalledTimes(1);
    expect(showCountCallBackMock).toHaveBeenCalledTimes(1);
  });
});