run - unit testing angular 6

Usando TypeMoq Mock con Angular TestBed

Question

FooService un FooService siguiente manera

import {Injectable} from "@angular/core";
export interface Foo {
Foo(): string;
}
@Injectable()
export class FooService implements Foo {
Foo(): string {
return "Fooey!";
}
}

y un BarComponent como este

import {Component} from "@angular/core";
import {FooService} from "./foo.service";
@Component({
moduleId: ''module.id'',
template: ''<h1>Bar Component</h1>''
})
export class BarComponent {
constructor(private fooService: FooService) {}
doFoo(): string {
return(this.fooService.Foo());
}
}

Ahora quiero probar mi BarComponent y me gustaría usar TypeMoq para burlar el FooService , así que hice lo siguiente

import * as TypeMoq from ''typemoq'';
import {Foo, FooService} from "./foo.service";
import {TestBed, async} from "@angular/core/testing";
import {BarComponent} from "./bar.component";
describe(''BarComponent'', () => {
let component: BarComponent;
let mockFooService: TypeMoq.IMock<Foo>;
beforeEach(async(() => {
mockFooService = TypeMoq.Mock.ofType<Foo>();
TestBed.configureTestingModule({
declarations: [BarComponent],
providers: [{ provide: FooService, useValue: mockFooService.object}]
});
}));
beforeEach(() => {
let fixture = TestBed.createComponent(BarComponent);
component = fixture.componentInstance;
});
it(''does something'', () => {
mockFooService.setup(x => x.Foo()).returns(() => "FooBar!");
expect(component.doFoo()).toEqual("FooBar!");
});
});

Sin embargo, ejecutar lo anterior da el siguiente error

SyntaxError: Function arg string contains parenthesis
at new Function (<anonymous>)
at evalExpression (webpack:///~/@angular/compiler/@angular/compiler.es5.js:25431:25 <- config/karma-test-shim.js:59412:40)
at jitStatements (webpack:///~/@angular/compiler/@angular/compiler.es5.js:25448:0 <- config/karma-test-shim.js:59429:12)
at JitCompiler._compileModule (webpack:///~/@angular/compiler/@angular/compiler.es5.js:25658:0 <- config/karma-test-shim.js:59639:35)
at createResult (webpack:///~/@angular/compiler/@angular/compiler.es5.js:25613:0 <- config/karma-test-shim.js:59594:106)
at JitCompiler._compileModuleAndAllComponents (webpack:///~/@angular/compiler/@angular/compiler.es5.js:25616:0 <- config/karma-test-shim.js:59597:40)
at JitCompiler.compileModuleAndAllComponentsSync (webpack:///~/@angular/compiler/@angular/compiler.es5.js:25559:0 <- config/karma-test-shim.js:59540:23)
at TestingCompilerImpl.compileModuleAndAllComponentsSync (webpack:///~/@angular/compiler/@angular/compiler/testing.es5.js:475:0 <- config/karma-test-shim.js:68201:31)
at TestBed._initIfNeeded (webpack:///~/@angular/core/@angular/core/testing.es5.js:705:0 <- config/karma-test-shim.js:21376:36)
at TestBed.createComponent (webpack:///~/@angular/core/@angular/core/testing.es5.js:791:0 <- config/karma-test-shim.js:21462:14)
at Function.TestBed.createComponent (webpack:///~/@angular/core/@angular/core/testing.es5.js:610:0 <- config/karma-test-shim.js:21281:29)
at Object.<anonymous> (webpack:///src/app/auth/login/bar.component.spec.ts:19:30 <- config/karma-test-shim.js:99954:41)
at ZoneDelegate.invoke (webpack:///~/zone.js/dist/zone.js:365:0 <- config/karma-test-shim.js:65763:26)
at ProxyZoneSpec.onInvoke (webpack:///~/zone.js/dist/proxy.js:79:0 <- config/karma-test-shim.js:65294:39)
at ZoneDelegate.invoke (webpack:///~/zone.js/dist/zone.js:364:0 <- config/karma-test-shim.js:65762:32)
at Zone.run (webpack:///~/zone.js/dist/zone.js:125:0 <- config/karma-test-shim.js:65523:43)
at Object.<anonymous> (webpack:///~/zone.js/dist/jasmine-patch.js:104:0 <- config/karma-test-shim.js:65010:34)
at webpack:///~/@angular/core/@angular/core/testing.es5.js:96:0 <- config/karma-test-shim.js:20767:17
at ZoneDelegate.invoke (webpack:///~/zone.js/dist/zone.js:365:0 <- config/karma-test-shim.js:65763:26)
at AsyncTestZoneSpec.onInvoke (webpack:///~/zone.js/dist/async-test.js:49:0 <- config/karma-test-shim.js:64605:39)
at ProxyZoneSpec.onInvoke (webpack:///~/zone.js/dist/proxy.js:76:0 <- config/karma-test-shim.js:65291:39)
at ZoneDelegate.invoke (webpack:///~/zone.js/dist/zone.js:364:0 <- config/karma-test-shim.js:65762:32)
at Zone.run (webpack:///~/zone.js/dist/zone.js:125:0 <- config/karma-test-shim.js:65523:43)
at AsyncTestZoneSpec._finishCallback (webpack:///~/@angular/core/@angular/core/testing.es5.js:91:0 <- config/karma-test-shim.js:20762:25)
at webpack:///~/zone.js/dist/async-test.js:38:0 <- config/karma-test-shim.js:64594:31
at ZoneDelegate.invokeTask (webpack:///~/zone.js/dist/zone.js:398:0 <- config/karma-test-shim.js:65796:31)
at Zone.runTask (webpack:///~/zone.js/dist/zone.js:165:0 <- config/karma-test-shim.js:65563:47)
at ZoneTask.invoke (webpack:///~/zone.js/dist/zone.js:460:0 <- config/karma-test-shim.js:65858:38)
at timer (webpack:///~/zone.js/dist/zone.js:1732:0 <- config/karma-test-shim.js:67130:29)

¿Es posible usar TypeMoq ''s con la TestBed angular y, de ser así, cómo lo haces correctamente?

Answer 1

Me encontré con esto también, está llegando debido a cómo estás haciendo tus proveedores.

Cambio

proveedores: [{provide: FooService, useValue: mockFooService.object}]

a

proveedores: [{provide: FooService, useFactory: () => {return mockFooService.object}}]

Usar la función de fábrica para devolver me liberó de los errores. Si usas useClass obtendrás un error sobre param.map no es una función, y si usas useValue obtienes un error sobre el paréntesis inesperado. useFactory y solo una función en línea que devuelve el trabajo moq.object funciona.

Answer 2

Si me permites un enchufe desvergonzado para mi biblioteca burlona ... así es como se vería con ineeda :

import { TestBed, async } from ''@angular/core/testing'';
import { ineeda } from ''ineeda'';
import { Foo, FooService } from ''./foo.service'';
import { BarComponent } from ''./bar.component'';
describe(''BarComponent'', () => {
let component: BarComponent;
TestBed.configureTestingModule({
declarations: [BarComponent],
providers: [{ provide: FooService, useClass: ineeda.factory<FooService>() }]
});
}));
beforeEach(() => {
let fixture = TestBed.createComponent(BarComponent);
component = fixture.componentInstance;
});
it(''does something'', () => {
let fooService = TestBed.get(FooService);
fooService.intercept({ Foo: () => ''FooBar!'');
expect(component.doFoo()).toEqual("FooBar!");
});
});