笑话报告测试通过，即使期望断言失败 [英] Jest reports that test passes even though expect assertion fails

问题描述

在此代码沙箱中，执行以下测试:

    import { of } from "rxjs";
    import { map } from "rxjs/operators";

    const source = of("World");

    test("It should fail", () => {
      source.subscribe(x => expect(x).toContain("NOTHING"));
    });

即使期望失败，Jest也会将其报告为通过.有想法吗?

Jest reports it as passing, even though the expectation fails. Thoughts?

推荐答案

rxjs可观察对象是异步的.看一下此页面以帮助测试异步代码

rxjs observables are asynchronous. Take a look at this page to help with testing asynchronous code

您要添加以下完成的参数->

You want to add the done argument as below ->

test("It should fail", done => {
  source.subscribe(
    x => {
      expect(x).toContain("NOTHING")
      done();
    });
});

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