小编The*_*fin的帖子

我目前正在使用 jest-preset-Angular 版本 9 在 Angular 9 中设置 Jest，代码运行但出现以下错误：

TypeError: Cannot read property 'ngModule' of null

不知道如何调试。

这是我的 jest.config.json

{
"preset": "jest-preset-angular",
"setupFilesAfterEnv": [
    "<rootDir>/setup-jest.ts"
],
"transformIgnorePatterns": [
    "node_modules/(?!@ngrx|ngx-socket-io)" 
],
"transform": {
    "^.+\\.(ts|js|html)$": "ts-jest"
},
"testPathIgnorePatterns": [
    "<rootDir>/node_modules/",
    "<rootDir>/dist/",
    "<rootDir>/src/test.ts"
],
"modulePaths": ["<rootDir>"]

}

和规格文件

import { async, ComponentFixture, TestBed } from '@angular/core/testing';
import { myComponent } from './knowuser.component';

import 'zone.js';
import 'zone.js/dist/async-test.js';
import 'zone.js/dist/proxy.js';
import 'zone.js/dist/zone-testing';

describe('myComponent', () => {
  let component: myComponent;
  let fixture: ComponentFixture<myComponent>;

  beforeEach(async(() => { …