为什么jasmine期望不验证错误被抛出？

Question

我有一个函数,抛出我正在测试的错误.这是功能:

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,我点击错误代码并想要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jasmine-expect用来测试抛出的错误.我究竟做错了什么？

Answer 1

你需要一个函数作为参数传递给expect连同toThrow或toThrowError.

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

要么

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