如何测试promise返回功能 [英] how to test promise returning functions

问题描述

我有以下异步函数返回Promise.

I have following async function that return Promise.

static getAccessToken(env: DeploymentEnv, username: string, password: string): Promise<AccessToken>;

现在，这是我为此编写的单元测试.

Now, this the unit test that I wrote for it.

it("should be able to get access token",async ()=>{
    let accessToken = await IModelHubServiceBusClient.getAccessToken('QA',
                      '[e-mail]',
                      'abc')!;

    assert.exists(accessToken);
});

运行时，它失败并显示以下错误:

When run it, it fails the test saying the following error:

should be able to get access token:
 Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.

我在做什么错，任何建议将不胜感激. 提前致谢.

What Am I doing wrong, any suggestions will be appreciated. Thanks in advance.

推荐答案

如果您测试异步代码，则需要使用done回调

You need to use done callback if you test async code

it("should be able to get access token",async (done)=>{
    let accessToken = await IModelHubServiceBusClient.getAccessToken('QA',
                      '[e-mail]',
                      'pmadm1')!;

    assert.exists(accessToken);
    done();
});

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