在玩笑的单位测试角度显示正确的错误 [英] show correct error in jest unit test angular

问题描述

我正在NX Angle工作区中编写单元测试.有时会出现这样的错误:

I am writing unit test in NX angular workspace. sometimes it is giving error like this :

(node:15320) UnhandledPromiseRejectionWarning: TypeError: Converting circular structure to JSON
    --> starting at object with constructor 'Object'
    |     property 'element' -> object with constructor 'Object'
    |     property 'componentProvider' -> object with constructor 'Object'
    --- property 'parent' closes the circle
    at stringify (<anonymous>)
    at writeChannelMessage (internal/child_process/serialization.js:117:20)
    at process.target._send (internal/child_process.js:779:17)
    at process.target.send (internal/child_process.js:677:19)
    at reportSuccess (C:\Users\INFINTY\angular\nfx__1-sep\node_modules\jest-runner\node_modules\jest-worker\build\workers\processChild.js:67:11)
(node:15320) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:15320) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

它没有显示确切的错误.我知道茉莉花/业力中有一个命令可以强制测试以显示正确的错误，但是我忘记了.谁能帮我，我怎么能在玩笑/柏树中得到确切的错误.

It is not showing the exact error. I know there was a command in jasmine/karma to force test to show correct error, but i forgot it. can anyone please help me, how can i get exact error in jest/cypress.

推荐答案

在我的应用中，只需将HttpClientModule导入测试文件中即可(该组件中使用了HttpClient):

In my app, it was a matter of importing the HttpClientModule into the test file (HttpClient was being used in that component):

import { HttpClientModule } from '@angular/common/http';

describe('AppComponent', () => {
    beforeEach(async () => {
        await TestBed.configureTestingModule({
            imports: [HttpClientModule, RouterTestingModule],
            declarations: [AppComponent],
        }).compileComponents();
    });
});

我正在使用:

• 角度10.1.4
• 开玩笑26.6.0
• 玩笑预设角度8.3.1

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