React.useEffect(() => {
branch.subscribe(({ params }) => {
if (
params &&
params['+clicked_branch_link'] &&
params['+match_guaranteed']
) {
dispatch(updateBranchioDetails(params));
}
});
}, []);
我已经使用了dispatch函数,并尝试为上面的代码写了一个测试用例
it('calls dispatch when branch.subscribe is called with valid params', () => {
const dispatchMock = jest.fn();
jest.spyOn(mockDispatch, 'useDispatch').mockReturnValue(dispatchMock);
const mockParams = {
'+clicked_branch_link': true,
'+match_guaranteed': true,
};
branch.subscribe({ params: mockParams });
expect(mockDispatch.useDispatch).toHaveBeenCalledWith(updateBranchioDetails(mockParams));
});
以上是测试套件,当我尝试运行测试覆盖率时,我面临以下问题。
expect(jest.fn()).toHaveBeenCalledWith(...expected) Expected: \[Function anonymous\] Number of calls: 0