将TypeMoq模拟量与Angular TestBed一起使用 [英] Using TypeMoq Mock With Angular TestBed
本文介绍了将TypeMoq模拟量与Angular TestBed一起使用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经如下定义了FooService
import {Injectable} from "@angular/core";
export interface Foo {
Foo(): string;
}
@Injectable()
export class FooService implements Foo {
Foo(): string {
return "Fooey!";
}
}
和这样的BarComponent
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());
}
}
现在我想测试我的BarComponent，并且我想使用TypeMoq来模拟FooService，所以我做了以下
Now I want to test my BarComponent and I'd like to use TypeMoq to mock the FooService, so I did the following
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!");
});
});
但是，运行上述命令会出现以下错误
However running the above gives the following 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)
是否可以将TypeMoq与尖角TestBed一起使用，如果是，您如何正确执行呢?
Is it possible to use TypeMoq's with the angular TestBed and if so how do you do it correctly?
推荐答案
我也遇到了这个问题，它的出现是因为您如何处理提供程序.
I was running into this also, it's coming in because of how you're doing your providers.
更改
providers: [{ provide: FooService, useValue: mockFooService.object}]
到
providers: [{ provide: FooService, useFactory: () => { return mockFooService.object } }]
使用factory函数返回对我来说摆脱了错误.如果使用useClass，则会出现有关param.map的错误信息，如果使用useValue，则会出现有关意外括号的错误. useFactory和只是一个返回moq.object的内联函数有效.
Using the factory function to return got rid of errors for me. If you use useClass you'll get an error about param.map is not a function, and if you use useValue you get an error about unexpected parenthesis. useFactory and just an inline function that returns the moq.object works, though.
这篇关于将TypeMoq模拟量与Angular TestBed一起使用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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