业力:属性没有访问类型获取 [英] Karma: property does not have access type get

问题描述

我的Angular应用程序的Karma测试中出现错误.错误是当我运行测试时:

I have an error in my Karma tests in my Angular application. The error is when I run my tests:

Failed: Property activePropertyChanged does not have access type get

我正在尝试模拟名为ModuleSpecService的服务.在此服务中，有以下吸气剂:

I'm trying to mock a service called ModuleSpecService. In this service there's the following getter:

get activePropertyChanged(): Observable<SpecificationPropertyObject> {
    return this.activePropChangedSubject.asObservable();
}

在我的spec文件中，我像这样模拟它:

And in my spec file I mock it like this:

spyOnProperty(moduleSpecServiceMock, 'activePropertyChanged', 'get').and.returnValue(of());

// then, in configureTestingModule() I define/mock the service like this:
providers: [{ provide: ModuleSpecService, useValue: moduleSpecServiceMock }]

因此，我的服务中显然有一个吸气剂，我想嘲笑它.如果我用spyOnProperty()删除行，则会引发以下错误:

So there's clearly a getter in my service which I want to mock. If I remove the line with spyOnProperty() it throws the following error:

TypeError: this.moduleSpecService.activePropertyChanged.subscribe is not a function

所以我绝对需要这个模拟游戏.

so I definitely need the mock.

有什么想法会出问题吗?

Any idea what could go wrong?

推荐答案

由于这似乎是茉莉花中的错误，所以我设法通过一种解决方法来解决此问题:

Since this seems to be a bug in jasmine I managed to fix this with a workaround:

代替此:

spyOnProperty(moduleSpecServiceMock, 'activePropertyChanged', 'get').and.returnValue(of()); 

我这样定义属性:

(moduleSpecServiceMock as any).activePropertyChanged = of();

我不得不将其强制转换为any，因为如果没有，它(正确)告诉我activePropertyChange是read-only属性(因为它只有一个吸气剂).

I had to cast it as any, because if not, it (correctly) told me that activePropertyChange is a read-only property (since it has only a getter).

不是最好的解决方案，但至少可以起作用:)

Not the best solution, but at least it works :)

这篇关于业力:属性没有访问类型获取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！