nUnit中的ExpectedException给了我一个错误 [英] ExpectedException in nUnit gave me an error

问题描述

我是不熟悉在.NET Framework上使用测试工具的人，因此我在ReSharper的帮助下从NuGet下载了它。

I'm new to using Testing Tools on the .NET Framework, so I downloaded it from NuGet with help from ReSharper.

我正在使用此快速入门以了解如何使用nUnit。我刚刚复制了代码，此属性出现错误：

I am using this Quick Start to learn how to use nUnit. I had just copied the code and an error came up on this attribute:

[ExpectedException(typeof(InsufficientFundsException))] //it is user defined Exception 

错误是：

找不到类型或名称空间名称'ExpectedException'
（您是否缺少using指令或程序集引用？）

The type or namespace name 'ExpectedException' could not be found (are you missing a using directive or an assembly reference?)

为什么？如果我需要这样的功能，我应该用什么代替它？

Why? And if I need such functionality, what should I replace it with?

推荐答案

如果您使用的是NUnit 3.0，那么您的错误是因为 ExpectedExceptionAttribute 已被删除。相反，您应该使用 Throws Constraint 这样的构造。

If you're using NUnit 3.0, then your error is because the ExpectedExceptionAttribute has been removed. You should instead use a construct like the Throws Constraint.

例如，您链接的教程进行了以下测试：

For example, the tutorial you linked has this test:

[Test]
[ExpectedException(typeof(InsufficientFundsException))]
public void TransferWithInsufficientFunds()
{
    Account source = new Account();
    source.Deposit(200m);

    Account destination = new Account();
    destination.Deposit(150m);

    source.TransferFunds(destination, 300m);
}

要将其更改为在NUnit 3.0下工作，请将其更改为以下内容：

To change this to work under NUnit 3.0, change it to the following:

[Test]
public void TransferWithInsufficientFunds()
{
    Account source = new Account();
    source.Deposit(200m);

    Account destination = new Account();
    destination.Deposit(150m);

    Assert.That(() => source.TransferFunds(destination, 300m), 
                Throws.TypeOf<InsufficientFundsException>());
}

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