为此我使用MSTEST和FluentAssertions 2.0.1.

我已经检查了这个Discussion on Codeplex,并看到它与异步异常方法的工作原理另一个关于FluentAssertions async tests的链接：

经过一段时间尝试使用我的“生产”代码,我已经关闭了Fluentassertions假的aync类,我的结果代码就像这样(把这个代码放在一个[TestClass]中：

[TestMethod]
public void TestThrowFromAsyncMethod()
{
    var asyncObject = new AsyncClass();
    Action action = () =>
    {
        Func<Task> asyncFunction = async () =>
        {
            await asyncObject.ThrowAsync<ArgumentException>();
        };
        asyncFunction.ShouldNotThrow();
    };
}


internal class AsyncClass
{
    public async Task ThrowAsync<TException>()
        where TException : Exception,new()
    {
        await Task.Factory.StartNew(() =>
        {
            throw new TException();
        });
    }

    public async Task SucceedAsync()
    {
        await Task.FromResult(0);
    }
}

问题是ShouldNotThrow无效：

ShouldNotThrow method is not recognised by the code. If I try to
compile,it gives me this error:
‘System.Func’ does not contain a
definition for ‘ShouldNotThrow’ and the best extension method overload
‘FluentAssertions.AssertionExtensions.ShouldNotThrow(System.Action,
string,params object[])’ has some invalid arguments

谢谢.

解

2.0.1 FA版本不支持这个ShouldNotThrow功能,它将被包含在下一个reléase2.1(接近下周).

注意：在2.0.1versión中已经支持ShouldThrow.