javascript - 为什么 jasmine-expect 不验证是否抛出了错误？

Question

我有一个函数会抛出我正在测试的错误。这是函数:

parse: function(input) {
        var results = {};       
        var that = this;
        input.forEach(function(dependency) {
            var split = dependency.split(": ");
            var lib = split[0];
            var depen = split[1];       
            if(depen === undefined) {
                throw new Error('Invalid input. Requires a space after each colon.')
            }
            results[lib] = depen;
        });
        return results;
    }

当我测试这个函数时，我遇到了错误代码并想验证是否抛出了错误。这是我的测试代码:

var invalidInput = ['Service1: ', 'Service2:stuff'] 
expect(manager.parse(invalidInput)).toThrowError();

但是我的测试失败了。这是我的堆栈跟踪:

Failures:

  1) dependency.js input should require a space after each colon as specified by requirements
   Message:
     Error: Invalid input. Requires a space after each colon.
   Stacktrace:
     Error: Invalid input. Requires a space after each colon.
    at /Users/name/Development/sight/dependency.js:49:11
    at Array.forEach (native)
    at Object.module.exports.parse (/Users/name/Development/sight/dependency.js:44:9)
    at null.<anonymous> (/Users/name/Development/sight/spec/dependency.spec.js:34:12)

我正在使用 jasmine-expect 来测试抛出的错误。我做错了什么？

Answer 1

您需要将函数作为参数传递给 expect 以及 toThrow 或 toThrowError。

var invalidInput = ['Service1: ', 'Service2:stuff'] 
expect(function () { manager.parse(invalidInput); }).toThrow();

或

var invalidInput = ['Service1: ', 'Service2:stuff'] 
expect(function () { manager.parse(invalidInput); }).toThrowError(Error);