无法比较 UnitTests 中的列表 [英] Cannot compare lists in UnitTests

问题描述

我需要在我的单元测试中比较如下列表:

I need to compare lists like the following in my unit tests:

var x = new List<object>() { new List<int>() };
var y = new List<object>() { new List<int>() };
CollectionAssert.AreEqual(x, y, "Expected response not the same as actual response.");

但我总是遇到下面的异常，我该如何克服这个问题?

But I am always getting the exception below, how do I go about overcoming this?

[Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException] ={"CollectionAssert.AreEqual 失败.预期响应与实际响应.(索引 0 处的元素不匹配.)"}

[Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException] = {"CollectionAssert.AreEqual failed. Expected response not the same as actual response.(Element at index 0 do not match.)"}

推荐答案

作为替代方案，您可以考虑使用 FluentAssertions 单元测试框架，与微软单元测试兼容.

As an alternative, you could consider using the FluentAssertions Unit Test framework, which is compatible with Microsoft Unit Test.

那么你的代码会变成:

var x = new List<object>() { new List<int>() };
var y = new List<object>() { new List<int>() };

x.ShouldBeEquivalentTo(y, "Expected response not the same as actual response.");

它也适用于这种事情:

var ints1 = new List<int>();
var ints2 = new List<int>();

ints1.Add(1);
ints2.Add(1);

var x = new List<object>() { ints1 };
var y = new List<object>() { ints2 };

x.ShouldBeEquivalentTo(y, "Expected response not the same as actual response.");

如果您将 ints2.Add(1); 更改为 ints2.Add(2);，则单元测试将正确失败.

If you changed ints2.Add(1); to ints2.Add(2);, the unit test would then correctly fail.

请注意，ShouldBeEquivalentTo() 递归地降低被比较的对象，并处理集合，因此即使是列表列表也可以使用它 - 例如:

Note that ShouldBeEquivalentTo() recursively descends the objects being compared, and handles collections, so even lists of lists will work with it - for example:

var ints1 = new List<int>();
var ints2 = new List<int>();

ints1.Add(1);
ints2.Add(1); // Change this to .Add(2) and the unit test fails.

var objList1 = new List<object> { ints1 };
var objList2 = new List<object> { ints2 };

var x = new List<object> { objList1 };
var y = new List<object> { objList2 };

x.ShouldBeEquivalentTo(y, "Expected response not the same as actual response.");

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