Chutzpah或Jasmine不允许我运行使用原型的测试 [英] Chutzpah or Jasmine does not let me run tests which use prototype

问题描述

在我的JavaScript测试中，Chutzpah和Jasmine在Visual Studio的解决方案中运行良好.

Chutzpah and Jasmine runs fine in my solution in Visual Studio, for my javascript tests.

我有一个问题，我认为是chutzpah，但我不确定100％(可能是茉莉花).

I have an issue, and I think it's chutzpah but I'm not 100% certain (it could be Jasmine).

我现在需要测试我的扩展方法，其中包含类似于

I now need to test my extension methods, which contains code similar to

if (!Array.prototype.where) {
    Array.prototype.where = function(callback) {
        const arr = [];
        this.forEach(function(item) {
            if (callback(item)) {
                arr.push(item);
            }
        });
        return arr;
    };
}

我的茉莉花测试是

    //arrange
    const array = [];
    const fixedInput = "a";
    array.push(fixedInput);
    array.push("b");
    
    //act
    const result = array.where(a => a === fixedInput);
    //console.log(result);

    //assert
    const expected = [fixedInput];
    expect(result).toBe(expected);
    expect(result.length).toBe(1);        

我无法通过命令行或Visual Studio中的Chutzpah插件运行此测试(并且在VS中显示为不可行的测试)

I am unable to run this test, over command line or the Chutzpah plug in within Visual Studio (and it does not show as a viable test in VS)

如果我注释掉 const result = array.where(a => a === fixedInput); ，则会发现测试.

If I comment out the const result = array.where(a => a === fixedInput); then the test is discovered.

如果执行测试，并注释掉该行，则会显示测试结果的Jasmine网页-打开该窗口，我可以编辑测试，取消注释该行，就可以得到期望的结果(但仅适用于几秒钟，直到结果页面变成找不到文件".

If I execute the test, with that line commented out, the Jasmine web page of test results is shown - with it open, I can edit the test, uncomment the line and I get the result I would expect (but only for a few seconds until that result page turns into a "file not found").

显示输出窗口

执行测试文件时发生未知错误.收到退出代码2

Unknown error occurred when executing test file. Received exit code of 2

我不知道该如何解决.有什么建议吗?

I don't know how to solve this. Any advice?

推荐答案

您可能遇到一个问题，默认情况下Chutzpah使用旧的JS引擎.您应该将chutzpah.json配置为使用更新的 https://github.com/mmanela/chutzpah/wiki/浏览器引擎

You are probably hitting an issue that Chutzpah by default uses an old JS engine. You should configure your chutzpah.json to use a newer one https://github.com/mmanela/chutzpah/wiki/Browser-Engines

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