Mudanças entre as edições de "Unit testing with default Angular installation"

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   });
 
   });
 
</source>
 
</source>
 +
 +
== Dependencies configuration ==
 +
 +
<source lang="javascript">
 +
describe('YourComponent', () => {
 +
  let component: YourComponent;
 +
  let fixture: ComponentFixture<YourComponent>;
 +
 +
  beforeEach(async(() => {
 +
    TestBed.configureTestingModule({
 +
      declarations:
 +
        [  ],
 +
      imports:
 +
        [  ],
 +
      providers:
 +
        [  ]
 +
    })
 +
    .compileComponents();
 +
  }));
 +
  ...
 +
})
 +
</source>
 +
  
 
[[Category: AngularJS2]]
 
[[Category: AngularJS2]]

Edição das 14h19min de 26 de abril de 2018


Asserting that a value is equal to something

expect(someVariable).toEqual('something');

Asserting that a value is defined

expect(someVariable).toBeDefined();

Asserting that a value is true

expect(someVariable).toBeTruthy();

Asserting that a value is false

expect(someVariable).toBeFalsy();

Getting instance of a service

let mockedService = TestBed.get(YourService);

Simple test structure

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

Injecting a service into a test

  it('your test', inject([YourService], (service: YourService) => {
 
  }));

Asserting that some method is called

let spySomeMethod = spyOn(someInstance, 'someMethod');
 
// do something here
 
expect(spySomeMethod).toHaveBeenCalled();

Asserting that some method is called with given arguments

let spySomeMethod = spyOn(someInstance, 'someMethod').and.callFake((arg1, arg2) => {
  expect(arg1).toEqual(10);
  expect(arg2).toEqual(20);
});
 
// do something here
 
expect(spySomeMethod).toHaveBeenCalled();

Mocked Http Requests

1) Instead of using HttpClientModule, you should use HttpClientTestingModule. You will also use HttpTestingController. Below how to import and configure them:

...
import { HttpClientTestingModule, HttpTestingController } from "@angular/common/http/testing";
...
 
describe('YourClass', () => {
 
  beforeEach(() => {
    TestBed.configureTestingModule({
      imports:
        ...
        [ AppRoutingModule, HttpClientTestingModule ]
        ...
    });
  });
  ...
});

2) In your test you need to get an instance of HttpTestingController:

  ...
  it('your test', () => {
 
    let httpMock = TestBed.get(HttpTestingController);
 
  });
  ...

3) In the same test you should assert that a call has been made with:

    let mockedResponse = {
        statusCode: 200,
        body: {
            anything: 'your endpoint returns'
        }
    }
 
    const request = httpMock.expectOne('http://some.request.url/to/somewhere');
 
    request.flush(mockedResponse);
    httpMock.verify();

Expecting that a method is called X times

    let spySomeMethod = spyOn(someInstance, 'someMethod');
 
    // do something here
 
    expect(spySomeMethod.calls.count()).toEqual(2);

Executing code prior to each test

  beforeEach(() => {
    // do your code here
  });

Dependencies configuration

describe('YourComponent', () => {
  let component: YourComponent;
  let fixture: ComponentFixture<YourComponent>;
 
  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations:
        [  ],
      imports:
        [  ],
      providers:
        [  ]
    })
    .compileComponents();
  }));
  ...
})