javascript - javascript测试中的异步断言

Question

我正在尝试测试一个 React 项目，我有以下异步测试应该在这里失败:fail("Fail: "+ response.status)

我需要做什么才能做到这一点？

describe('Test dummy data endpoint', () => {
        it('Test postman-echo for 2 element todo list', (done) => {
                var options = {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json'
                    },
                    body: JSON.stringify(["One", "Two"])
                }
                var promise = fetch('https://postman-echo.com/post', options);
                promise.then(
                    function (response) {
                        it('Status should be 200', (stschk) => {
                            fail("Fail: " + response.status)
                            stschk()
                        })
                        return response.json()
                    },
                    function (error) {
                        fail("Failed", error)
                    }
                )
                done()
            }
        )
    }
)

Answer 1

对于任何正在寻找的人，这里是如何做的:

describe('Test ajax', () => {
    it('Test postman-echo for 2 element todo list', (asdf) => {
        expect.assertions(2)
        var options = {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify(["One", "Two"])
        }
        fetch('https://postman-echo.com/post', options).then(
            function (data) {
                expect(data.status).toEqual(200)
                data.json().then((jd) => {
                    expect(jd.data.length).toEqual(2)
                    asdf()
                })
            }
        )
    })
})