I am trying to test my component with angular 2 final, but I get an error because the component uses the routerLink
directive. I get the following error:
Can't bind to 'routerLink' since it isn't a known property of 'a'.
This is the relevant code of the ListComponent
template
<a
*ngFor="let item of data.list"
class="box"
routerLink="/settings/{{collectionName}}/edit/{{item._id}}">
And here is my test.
import { TestBed } from '@angular/core/testing';
import { ListComponent } from './list.component';
import { defaultData, collectionName } from '../../config';
import { initialState } from '../../reducers/reducer';
const data = {
sort: initialState.sort,
list: [defaultData, defaultData],
};
describe(`${collectionName} ListComponent`, () => {
let fixture;
beforeEach(() => {
TestBed.configureTestingModule({
declarations: [
ListComponent,
],
}).compileComponents(); // compile template and css;
fixture = TestBed.createComponent(ListComponent);
fixture.componentInstance.data = data;
fixture.detectChanges();
});
it('should render 2 items in list', () => {
const el = fixture.debugElement.nativeElement;
expect(el.querySelectorAll('.box').length).toBe(3);
});
});
I looked at several answers to similar questions but could not find a solution that worked for me.
You need to configure all the routing. For testing, rather than using the RouterModule
, you can use the RouterTestingModule
from @angular/router/testing
, where you can set up some mock routes. You will also need to import the CommonModule
from @angular/common
for your *ngFor
. Below is a complete passing test
import { Component } from '@angular/core';
import { Router } from '@angular/router';
import { By } from '@angular/platform-browser';
import { Location, CommonModule } from '@angular/common';
import { RouterTestingModule } from '@angular/router/testing';
import { TestBed, inject, async } from '@angular/core/testing';
@Component({
template: `
<a routerLink="/settings/{{collName}}/edit/{{item._id}}">link</a>
<router-outlet></router-outlet>
`
})
class TestComponent {
collName = 'testing';
item = {
_id: 1
};
}
@Component({
template: ''
})
class DummyComponent {
}
describe('component: TestComponent', function () {
beforeEach(() => {
TestBed.configureTestingModule({
imports: [
CommonModule,
RouterTestingModule.withRoutes([
{ path: 'settings/:collection/edit/:item', component: DummyComponent }
])
],
declarations: [ TestComponent, DummyComponent ]
});
});
it('should go to url',
async(inject([Router, Location], (router: Router, location: Location) => {
let fixture = TestBed.createComponent(TestComponent);
fixture.detectChanges();
fixture.debugElement.query(By.css('a')).nativeElement.click();
fixture.whenStable().then(() => {
expect(location.path()).toEqual('/settings/testing/edit/1');
console.log('after expect');
});
})));
});
Another option, if you just want to test that the routes are rendered correctly, without trying to navigate...
You an just import the RouterTestingModule
without configuring any routes
imports: [ RouterTestingModule ]
then just check that the link is rendered with the correct URL path, e.g.
let href = fixture.debugElement.query(By.css('a')).nativeElement
.getAttribute('href');
expect(href).toEqual('/settings/testing/edit/1');