使用Jasmine toThrowError时似乎无法捕获错误 [英] Can't seem to catch error when using Jasmine toThrowError

问题描述

我开始尝试jasmine并且我想使用toThrowError（）函数但我的测试不想成功。

I beginning to try jasmine and I want to use the toThrowError() function but my test does not want to succeed.

我有一个函数我扔了错误：

I have one function where I throw an error:

test.service.ts

test(list:{}){ 
    if(list == null){
        throw new TypeError();
    }
    else{
        // do something...
    }
}

我的测试：

it('shall throw an error', inject()
    [
        TestService
    ],
    (
        testService: TestService
    ) => {
        let test = testService.test(null);
        expect(test).toThrowError(TypeError);
    }
);

我的测试失败并显示未捕获的TypeError（当我调用它时我正在尝试赶紧）。

And my test fails with an Uncaught TypeError (when I call it I'm doing it in a try catch).

推荐答案

你应该期待一个用 null调用你的函数的函数，抛出错误。现在你期望调用函数的结果抛出一个错误，这是没有发生的。

You should expect a function, that calls your function with null, to throw an error. Right now you're expecting the result of calling the function to throw an error, which isn't happening.

expect(() => testService.test(null)).toThrowError(TypeError);

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