Angular 2单元测试：注入Typemoq对象 [英] Angular 2 Unit Testing: Injecting Typemoq objects

问题描述

我正在使用Typescript中的Angular 2（RC4）服务实现单元测试。要测试的服务（计算）使用许多其他组件（Bausparen），它们使用组件（BausparenInput）。所有组件都声明为@Injectable（）。

I'm implementing a unit test for a Service in Angular 2 (RC4) in Typescript. The service to test ("Calculation") uses a lot of other components ("Bausparen"), which on their part use components ("BausparenInput"). All components are declared @Injectable().

我试图使用 Typemoq 并在运行测试之前注入它们。无论如何，它不起作用：

I tried to mock the depending components like Bausparen using Typemoq and injecting them before running the tests. Anyway, it doesn't work:

FAILED TESTS:
Calculation Service
× should return empty array when fromYear > toYear
  PhantomJS 2.1.1 (Windows 7 0.0.0)
factory
factory
resolveReflectiveFactory
resolveReflectiveProvider
map@[native code]
apply@[native code]
call@[native code]
call@[native code]
Call
map
resolveReflectiveProviders
resolve
resolveAndCreateChild
createInjector
execute

内部 Jasmines 描述函数，代码如下：

Inside Jasmines describe function, the code looks like this:

let calcInput = x => x.calc(TypeMoq.It.isAnyNumber(), TypeMoq.It.isAnyNumber());
let calcInputFormer = x => x.calc(TypeMoq.It.isAnyNumber(), TypeMoq.It.isAnyNumber(), TypeMoq.It.isAnyNumber());
let calcOutput = (y, m) => new CalcOutput();
let calcOutputFormer = (y, m, f) => new CalcOutput();
let bausparenMock = TypeMoq.Mock.ofType(Bausparen);
bausparenMock.setup(calcInput).returns(calcOutput);
bausparenMock.setup(calcInputFormer).returns(calcOutputFormer);

beforeEach(() => {
  addProviders([CalculationService,
    { provide: Bausparen, useClass: bausparenMock }]);
});

it('should return empty array when fromYear > toYear',
  inject([CalculationService], (calculation: CalculationService) => {
    let result = calculation.getValues(6, 2017, 6, 2016);
    expect(result.length).toBe(0);
}));

和类的签名是这样的：

class Bausparen implements Calculation {
  calc(year: number, month: number, formerAmount?: number): CalcOutput {...}
}

错误消息并没有真正告诉我任何事情。如果在我的模拟设置或注入中它是一个问题，我甚至不会得到它。有没有人之前有类似的错误？

The error message doesn't really tell me anything. I don't even get if it's a problem in the setup of my mock or in injecting it. Has anybody had a similar error before?

推荐答案

你应该替换：

{ provide: Bausparen, useClass: bausparenMock }

with ：

{ provide: Bausparen, useValue: bausparenMock }

因为mock是值不是类

Because mock is value not a class

还要看 ts-mockito

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