typescript Angular 2测试片段。代码库https://developers.livechatinc.com/blog/category/programming/angular-2/
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import {
beforeEachProviders,
describe,
expect,
inject,
it,
} from '@angular/core/testing';
import {
ComponentFixture,
TestComponentBuilder,
} from '@angular/compiler/testing';
import { ROUTER_FAKE_PROVIDERS } from '@angular/router/testing';
import { App } from './app';
import { setBaseTestProviders } from '@angular/core/testing';
import {
TEST_BROWSER_DYNAMIC_APPLICATION_PROVIDERS,
TEST_BROWSER_DYNAMIC_PLATFORM_PROVIDERS,
} from '@angular/platform-browser-dynamic/testing';
setBaseTestProviders(TEST_BROWSER_DYNAMIC_PLATFORM_PROVIDERS, TEST_BROWSER_DYNAMIC_APPLICATION_PROVIDERS);
describe('App', () => {
beforeEachProviders(() => [ROUTER_FAKE_PROVIDERS])
it('should be able to test', inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
return tcb.createAsync(App).then(componentFixture => {
componentFixture.detectChanges();
expect(true).toBe(true);
});
}));
});
// App
import { Injectable } from '@angular/core';
import { Http } from '@angular/http';
@Injectable()
export class TestService {
constructor(private http: Http) {}
getUsers() {
return this.http.get('http://foo.bar');
}
}
// App tests
import {
beforeEach,
beforeEachProviders,
describe,
expect,
inject,
it,
} from '@angular/core/testing';
import { provide } from '@angular/core';
import { BaseRequestOptions, Response, ResponseOptions } from '@angular/http';
import { MockBackend, MockConnection } from '@angular/http/testing';
describe('Http', () => {
beforeEachProviders(() => [
TestService,
BaseRequestOptions,
MockBackend,
provide(Http, {
useFactory: (backend: MockBackend, defaultOptions: BaseRequestOptions) => {
return new Http(backend, defaultOptions);
},
deps: [MockBackend, BaseRequestOptions]
})
]);
beforeEach(inject([MockBackend], (backend: MockBackend) => {
const baseResponse = new Response(new ResponseOptions({ body: 'got response' }));
backend.connections.subscribe((c: MockConnection) => c.mockRespond(baseResponse));
}));
it('should return response when subscribed to getUsers',
inject([TestService], (testService: TestService) => {
testService.getUsers().subscribe((res: Response) => {
expect(res.text()).toBe('got response');
});
})
);
})
// App
class TestService {
public name: string = 'Injected Service';
}
// App tests
import {
it,
describe,
expect,
inject,
beforeEachProviders,
} from '@angular/core/testing';
import { provide } from '@angular/core';
import { setBaseTestProviders } from '@angular/core/testing';
import {
TEST_BROWSER_DYNAMIC_APPLICATION_PROVIDERS,
TEST_BROWSER_DYNAMIC_PLATFORM_PROVIDERS,
} from '@angular/platform-browser-dynamic/testing';
setBaseTestProviders(TEST_BROWSER_DYNAMIC_PLATFORM_PROVIDERS, TEST_BROWSER_DYNAMIC_APPLICATION_PROVIDERS);
describe('TestService', () => {
beforeEach(() => {
this.testService = new TestService();
});
it('should have name property set', () => {
expect(this.testService.name).toBe('Injected Service');
});
});
describe('TestService Injected', () => {
beforeEachProviders(() => [TestService]);
it('should have name property set', inject([TestService], (testService: TestService) => {
expect(testService.name).toBe('Injected Service');
}));
});
class MockTestService {
public mockName: string = 'Mocked Service';
}
describe('TestService Mocked', () => {
beforeEachProviders(() => [
provide(TestService, {useClass: MockTestService})
]);
it('should have name property set', inject([TestService], (testService: TestService) => {
expect(testService.mockName).toBe('Mocked Service');
}));
});
class MockTestServiceInherited extends TestService {
public sayHello(): string {
return this.name;
}
}
describe('TestService Mocked Inherited', () => {
beforeEachProviders(() => [
provide(TestService, { useClass: MockTestServiceInherited })
]);
it('should say hello with name', inject([TestService], (testService: TestService) => {
expect(testService.sayHello()).toBe('Injected Service');
}));
});
// App
import { Component, Input } from '@angular/core';
import { NgFor } from '@angular/common';
@Component({
selector: 'list',
template: '<span *ngFor="let user of users">{{ user }}</span>',
directives: [NgFor],
})
export class ListComponent {
@Input() public users: Array<string> = [];
}
// App tests
import {
async,
it,
describe,
expect,
inject,
beforeEach,
beforeEachProviders,
} from '@angular/core/testing';
import {
ComponentFixture,
TestComponentBuilder,
} from '@angular/compiler/testing'
import { setBaseTestProviders } from '@angular/core/testing';
import {
TEST_BROWSER_DYNAMIC_APPLICATION_PROVIDERS,
TEST_BROWSER_DYNAMIC_PLATFORM_PROVIDERS,
} from '@angular/platform-browser-dynamic/testing';
setBaseTestProviders(TEST_BROWSER_DYNAMIC_PLATFORM_PROVIDERS, TEST_BROWSER_DYNAMIC_APPLICATION_PROVIDERS);
describe('ListComponent', () => {
it('should render list', inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
return tcb.createAsync(ListComponent).then(componentFixture => {
const element = componentFixture.nativeElement;
componentFixture.componentInstance.users = ['John'];
componentFixture.detectChanges();
expect(element.querySelectorAll('span').length).toBe(1);
});
}));
});
// App DI
class UserService {
public users: Array<string> = ['John'];
}
@Component({
selector: 'list',
template: '<span *ngFor="let user of users">{{ user }}</span>',
directives: [NgFor],
})
class ListComponentBootstrapDI {
private users: Array<string> = [];
constructor(userService: UserService) {
this.users = userService.users;
}
}
// App DI tests
import { provide } from '@angular/core';
class MockUserService {
public users: Array<string> = ['John', 'Steve'];
}
describe('ListComponent DI', () => {
beforeEachProviders(() => [
provide(UserService, { useClass: MockUserService })
]);
it('should render list', inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
return tcb.createAsync(ListComponentBootstrapDI).then(componentFixture => {
const element = componentFixture.nativeElement;
componentFixture.detectChanges();
expect(element.querySelectorAll('span').length).toBe(2);
});
}));
});
// App DI for Component
@Component({
selector: 'list',
template: '<span *ngFor="let user of users">{{ user }}</span>',
directives: [NgFor],
providers: [UserService],
})
class ListComponentComponentDI {
private users: Array<string> = [];
constructor(userService: UserService) {
this.users = userService.users;
}
}
// App DI for Component tests
describe('ListComponent DI Component', () => {
it('should render list', inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
tcb
.overrideProviders(
ListComponentComponentDI,
[provide(UserService, { useClass: MockUserService })]
)
.createAsync(ListComponentComponentDI).then(componentFixture => {
const element = componentFixture.nativeElement;
componentFixture.detectChanges();
expect(element.querySelectorAll('span').length).toBe(2);
});
}));
});
// App final test
describe('ListComponent Final', () => {
beforeEach(async(inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
tcb
.overrideProviders(
ListComponentComponentDI,
[provide(UserService, { useClass: MockUserService })]
)
.createAsync(ListComponentComponentDI)
.then(componentFixture => {
this.listComponentFixture = componentFixture;
});
})));
it('should render list', () => {
const element = this.listComponentFixture.nativeElement;
this.listComponentFixture.detectChanges();
expect(element.querySelectorAll('span').length).toBe(2);
});
});
// App
import { Component } from '@angular/core';
@Component({
selector: 'app',
template: '<span>{{ sayHello() }}</span>',
})
export class App {
public name: string = 'John';
sayHello(): string {
return `Hello ${this.name}`;
}
}
// App tests
describe('App', () => {
beforeEach(() => {
this.app = new App();
});
it('should have name property', () => {
expect(this.app.name).toBe('John');
});
it('should say hello with name property', () => {
expect(this.app.sayHello()).toBe('Hello John');
});
});
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