为什么在此 MSpec 测试中会出现 NullReferenceException？

Question

所以我安装了这些 nuget 包：

在这些参考文献中达到高潮：

我使用 NCrunch。我有这个规格：

namespace GlobPatternMatching.Tests
{
    using FluentAssertions;

    using Machine.Fakes;
    using Machine.Specifications;

    [Subject(typeof(GlobMatching))]
    public class When_Given_Literal : WithSubject<GlobMatching>
    {
        private static string pattern = "path";

        private static string[] result;

        private Establish context => () =>
            {
                pattern = "path";
            };

        private Because of => () => result = Subject.GetGlobs(pattern);

        private It should_return_path_in_the_array = () =>
            {
                result[0].Should().Be("path");
            };
    }
}

对于这个类：

namespace GlobPatternMatching
{
    using System;

    public class GlobMatching
    {
        public string[] GetGlobs(string pattern)
        {
            return pattern.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
        }
    }
}

TDD 直截了当，我得到空引用异常。调试时无法单步执行该方法，并且所有规范类字段均为空.....

我不觉得我错过了什么，但如果你不介意看看我在这里做错了什么，那就太好了。我正在使用最新的 VS2015、NCrunch 等...

Answer 1

你不会相信问题是什么......

private Establish context => () =>
{
    pattern = "path";
};

private Because of => () => result = Subject.GetGlobs(pattern);

我已经输入了=> 而不是=....

// ----------------------\/-------
private Establish context = () =>
{
    pattern = "path";
};

// ----------------\/------------    
private Because of = () => result = Subject.GetGlobs(pattern);