xUnit：多重断言或软断言

Question

如何在 xUnit 中找到多个断言或软断言？我发现 Nunit 有以下能力，试图在 xUnit 中找到类似的选项。

Assert.Multiple(() =>
 {
   Assert.AreEqual(expectedResult1, actualResult1, "Mismatch in Score1!");
   Assert.AreEqual(expectedResult2, actualResult2, "Mismatch in Score2!");
   Assert.AreEqual(expectedResult3, actualResult3, "Mismatch in Score3!");
  });

Answer 1

从 xUnit 2 开始，它 does not exist。

There are plenty of things we could do, but for many reasons we choose not to. This reasons include: (a) implementation and maintenance cost; (b) competing priorities; (c) philosophical objections to features.

In this case, you're running afoul of (c). We do not believe that a unit testing framework should ever run more than one failing assertion.

xUnit 通常比 NUnit 固执己见，出于意识形态原因，不会包含 NUnit 支持的内容。

它looks like xUnit 3 will support this，使用Assert.Multiple。

Answer 2

如果您喜欢 BDD / 流畅风格的断言，您可以考虑使用这些库之一，它们都与 xUnit 完全兼容：

FluentAssertions offers soft assertions via Assertions Scopes:

using (new AssertionScope())
{
   actualResult1.Should().Be(expectedResult1, "Mismatch in Score1!");
   actualResult2.Should().Be(expectedResult2, "Mismatch in Score2!");
}

Shouldly offers soft assertions via ShouldSatisfyAllConditions()处理对象时的方法：

var mrBurns = new Person { Name = null };
mrBurns.ShouldSatisfyAllConditions(
   () => mrBurns.Name.ShouldNotBeNullOrEmpty(),
   () => mrBurns.Name.ShouldBe("Mr.Burns"));

Answer 3

将您的测试用例放入 IEnumerable<T> 并使用 Assert.All<T>():

var expectations = new List<Tuple<object, object>>()
{
    new(expectedResult1, actualResult1),
    new(expectedResult2, actualResult2),
    new(expectedResult3, actualResult3),
};
Assert.All(expectations, pair => Assert.Equal(pair.Item1, pair.Item2));

Answer 4

现在确实存在https://github.com/xunit/assert.xunit/blob/main/MultipleAsserts.cs, after the issue 1920 got addressed. It is shipped first in the assert.xunit-tag 2.4.2-pre.19 and the NuGet-package assert.xunit 2.4.2-pre.12. See also Release Notes of xUnit.net 2.4.2 Pre-Release (build 12)

题目中的例子可以写成

Assert.Multiple(
    () => Assert.AreEqual(expectedResult1, actualResult1, "Mismatch in Score1!"),
    () => Assert.AreEqual(expectedResult2, actualResult2, "Mismatch in Score2!"),
    () => Assert.AreEqual(expectedResult3, actualResult3, "Mismatch in Score3!"));

xUnit：多重断言或软断言

xUnit : Mutiple Assertions or Soft Assert

c#

xunit

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