Angular 4 - Failed: Can't resolve all paramete

2020-06-07 04:04发布

I have referred the following link to get the answers, but I couldn't find any working solution for my scenario. Error: (SystemJS) Can't resolve all parameters for ActivatedRoute: (?, ?, ?, ?, ?, ?, ?, ?)

Therefore, I have been trying to remove the Activated Route from the providers and still the test bed is not passing. It shows

Error: No provider for ActivatedRoute!

So here is my code, I want to run my test bed in the angular application which is using Jasmine.

import { ActivatedRoute } from '@angular/router';
import { async, ComponentFixture, TestBed } from '@angular/core/testing';
import { RouterModule, Routes } from '@angular/router';
import { RouterTestingModule } from '@angular/router/testing';

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

  beforeEach(async(() => {
    TestBed.configureTestingModule({ 
      imports: [ RouterModule, RouterTestingModule ],
      declarations: [ SomeComponent ],
      providers: [ ActivatedRoute ],
    })
    .compileComponents();
  }));

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

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

Error getting

enter image description here

3条回答
贪生不怕死
2楼-- · 2020-06-07 04:39

You want to inject a fake ActivatedRoute to your component, since you create it yourself in the test, and the router thus doesn't create it for you and inject an ActivatedRoute. So you can use something like this:

describe('SomeComponent', () => {

  const fakeActivatedRoute = {
    snapshot: { data: { ... } }
  } as ActivatedRoute;

  beforeEach(async(() => {
    TestBed.configureTestingModule({ 
      imports: [ RouterTestingModule ],
      declarations: [ SomeComponent ],
      providers: [ {provide: ActivatedRoute, useValue: fakeActivatedRoute} ],
    })
    .compileComponents();
  }));
});
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劫难
3楼-- · 2020-06-07 04:45
{
  provide: ActivatedRoute,
  useValue: {
    snapshot: {
      queryParamMap: {
        get(): number {
          return 6;
        }
      }
    }
  }
}
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我想做一个坏孩纸
4楼-- · 2020-06-07 04:54

Here's a solution for angular 7

{
    provide: ActivatedRoute,
    useValue: {
        snapshot: {
            paramMap: {
                get(): string {
                    return '123';
                },
            },
        },
    },
},
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