我为组件中的一些Axios调用编写了单元测试。我验证了呼叫成功解决的成功路径,但是我无法验证呼叫拒绝的失败路径。如何使用模拟来验证这一点?
这是我的FetchImage.vue
组件的摘要:
methods: {
preparedFetch() {
axios.get(this.imageurl).then(result => {
this.imageInformation.title = result.data.title;
this.imageInformation.copyright = result.data.copyright;
this.imageInformation.detailExplanation = result.data.explanation;
this.imageInformation.date = result.data.date;
this.imageInformation.urlinfo = result.data.url;
this.resultArrived = true;
this.$emit('imagefetched',this.imageInformation);
})
.catch( error => {
this.errorMessage = "Information not found";
this.resultArrived = true;
});
}
}
以及我对呼叫何时拒绝(针对无效网址)的测试:
describe('Invalid response',async () => {
beforeEach(() => {
axios.get.mockClear();
axios.get.mockReturnValue(Promise.reject({}));
});
it('Invalid URL verfication', async () => {
// Given
const result = {
errorMessage : "Information not found",
resultArrived : true,
fetchStatus : true
};
// Fetch the error result
axios.get.mockReturnValue(Promise.resolve(result));
const fetchwrapper = mount(FetchImage);
fetchwrapper.vm.imageurl = "https://invalid.request.gov";
fetchwrapper.vm.preparedFetch();
await fetchwrapper.vm.$nextTick();
// Validate the result
expect(axios.get).not.toHaveBeenCalledWith('https://api.nasa.gov/planetary/apod?api_key=vME6LAMD7IhEiy7rDmjfIaG6MhiKbu1MNIqxtqd1');
expect(axios.get).toHaveBeenCalledWith("https://invalid.request.gov");
expect(axios.get).toHaveBeenCalledTimes(1);
expect(fetchwrapper.vm.errorMessage.length).not.toEqual(0);
expect(fetchwrapper.vm.errorMessage).toBe("Information not found");
});
});
答案 0 :(得分:0)
您的catch
块未运行,因为模拟返回值实际上应为Promise.resolve()
时使用Promise.reject()
:
describe('Invalid response',async () => {
it('Invalid URL verfication', async () => {
// axios.get.mockReturnValue(Promise.resolve(result)); // DON'T DO THIS
axios.get.mockReturnValue(Promise.reject(result));
});
});