错误：无法解析 ActivatedRoute 的所有参数：(?, ?, ?, ?, ?, ?, ?, ?)

Question

我正在尝试使用 Karma/Jasmine 中的 ActivatedRoute 类测试 Angular 组件，但我遇到了一个非常烦人的错误，我无法修复。 Error: Can't resolve all parameters for ActivatedRoute: (?, ?, ?, ?, ?, ?, ?, ?)

我已经尝试了我在网上找到的所有解决方案，以各种方式模拟激活的路线。但我就是无法让它工作。

import { ComponentFixture, TestBed } from '@angular/core/testing';
import { ActivatedRoute, convertToParamMap } from '@angular/router';
import { RouterTestingModule } from '@angular/router/testing';
import { of } from 'rxjs';

import { SearchbarComponent } from './searchbar.component';

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

  beforeEach(async () => {
    await TestBed.configureTestingModule({
      imports: [ RouterTestingModule ],
      declarations: [ SearchbarComponent ],
      providers: [
        {
          provide: ActivatedRoute,
          useValue: {
            queryParams: of(convertToParamMap({ 
              search: ""         
            }))
          }
        }
    ]
    })
    .compileComponents();
  });

  beforeEach(() => {
    fixture = TestBed.createComponent(SearchbarComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

  it('should create', () => {
    expect(component).toBeTruthy();
  });
});

import { Input, Component, HostListener, OnInit } from '@angular/core';
import { ActivatedRoute, Router } from '@angular/router';
...
@Component({
  selector: 'searchbar',
  templateUrl: './searchbar.component.html',
  styleUrls: ['./searchbar.component.scss'],
  providers: [ ActivatedRoute ]
})
export class SearchbarComponent implements OnInit {

  constructor(private route: ActivatedRoute) { 
    this.route.queryParams
    .subscribe(params => {
        this.currentSearch = params.search;
    });
  }
...
}

Answer 1

RouterTestingModule 处理所有与路由相关的东西的模拟，包括ActivatedRoute。您可以删除 providers 部分，我希望它可以工作

import { ComponentFixture, TestBed } from '@angular/core/testing';
import { ActivatedRoute, convertToParamMap } from '@angular/router';
import { RouterTestingModule } from '@angular/router/testing';
import { of } from 'rxjs';

import { SearchbarComponent } from './searchbar.component';

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

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

  beforeEach(() => {
    fixture = TestBed.createComponent(SearchbarComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

  it('should create', () => {
    expect(component).toBeTruthy();
  });
});