我如何测试因错误而拒绝的承诺? (这是预期的行为)
我不知道为什么这个测试失败了。我正在捕获被拒绝的错误,并且测试仍然失败。根据{{3}}提供的示例,此方法应该有效,并且无法弄清楚它应该如何实现。这两个控制台日志都会出现。
it('shows that even an error occurs the test passes', (done) => {
const promise = new Promise((resolve, reject) => {
console.log('error promise is called');
setTimeout(() => {
reject(new Error('dummy error thrown'));
}, 100);
})
promise.then(() => {});
promise.catch((e) => {
console.log('error caught');
done();
});
});
1) promise behaviour in tests (async) - base test cases shows that even an error occurs the test passes:
Uncaught Error: dummy error thrown
at Timeout.setTimeout [as _onTimeout] (test\promise-spec.js:24:17)
这样尝试,仍然失败
promise
.then(() => {})
.catch((e) => {
console.log('error caught');
done();
});
答案 0 :(得分:0)
原来是因为之前的测试没有完成,并且抛出错误杀死了该测试