angular - 如何修复 beforeEachProviders（RC4 已弃用）

Question

我刚刚将 Angular2 从 RC3 升级到 RC4 ...

import {
  expect, it, iit, xit,
  describe, ddescribe, xdescribe,
  beforeEach, beforeEachProviders, withProviders,
  async, inject
} from '@angular/core/testing';

在我的单元测试中，我有以下代码......

beforeEachProviders(() => [
    {provide: Router, useClass: MockRouter}
]);

这工作正常，但自从移动到 RC4 后，我在beforeEachProviders.

有人知道新的做事方式是什么吗？beforeEachProviders或者我应该从其他地方而不是“@angular/core/testing”导入？

Answer 1

您需要从 @angular/core/testing 导入 addProviders。

代替：

beforeEachProviders(() => [
    {provide: Router, useClass: MockRouter}
]);

你会想要这样做：

beforeEach(() => {
    addProviders([
        {provide: Router, useClass: MockRouter}
    ])
});

资料来源：RC4 变更日志

Answer 2

在查看了其他一些文档后，您似乎想要：

beforeEach(() => TestBed.configureTestingModule({
        providers: [
            { provide: Service, useClass: MockService }
        ]})
    );

来源：https ://angular.io/guide/dependency-injection

Answer 3

这是一个完整的示例，用于 Window 参考服务：

import { TestBed, inject } from '@angular/core/testing';
import { WindowRef } from './window-ref';

describe('WindowRef', () => {
  let subject: WindowRef;

  beforeEach(() => {
    TestBed.configureTestingModule({
      providers: [
        WindowRef
      ]});
  });

  beforeEach(inject([WindowRef], (windowRef: WindowRef) => {
    subject = windowRef;
  }));

  it('should provide a way to access the native window object', () => {
    expect(subject.nativeWindow).toBe(window);
  });
});