Question

我有一个嵌套的class，FluentAssertions可以声明它们。
然后，将class更改为struct，测试失败。

（如果我将IEnumerable<ItemStruct> MyItems { get; set; }更改为ItemStruct MyItem { get; set; }，则在两种情况下比较成功。因此，我猜测与IEnumerable有关。）

using FluentAssertions;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Collections.Generic;

namespace CowsCannotReadLogs.FileHandling.UnitTest
{
    [TestClass]
    public class TestFluentAssertionStruct
    {
        public struct DataStruct
        {
            public IEnumerable<string> MyItems { get; set; }
        }

        // Fails.
        [TestMethod]
        public void TestSimpleStruct()
        {
            var data1 = new DataStruct { MyItems = new[] { "A" } };
            var data2 = new DataStruct { MyItems = new[] { "A" } };
            data1.Should().BeEquivalentTo(data2);
        }

        // Fails.
        [TestMethod]
        public void TestSimpleStructWithComparingByValue()
        {
            var data1 = new DataStruct { MyItems = new[] { "A" } };
            var data2 = new DataStruct { MyItems = new[] { "A" } };
            data1.Should().BeEquivalentTo(data2, 
                options => options.ComparingByValue<DataStruct>());
        }


        public class DataClass
        {
            public IEnumerable<string> MyItems { get; set; }
        }

        // Succeeds.
        [TestMethod]
        public void TestSimpleClass()
        {
            var data1 = new DataClass { MyItems = new[] { "A" } };
            var data2 = new DataClass { MyItems = new[] { "A" } };
            data1.Should().BeEquivalentTo(data2);
        }
    }
}

Answer 1

在<object att5="some" att7="other" id="6" name="value"> ... </object>上使用BeEquivalentTo时，默认情况下将通过 value语义比较这两个实例。要比较其成员的结构，可以在本地或全局覆盖默认行为。

在测试内部：

struct

全球范围内[TestMethod] public void Test() { subject.Should().BeEquivalentTo(expected, opt => opt.ComparingByMembers<DataStruct>()); }：

[AssemblyInitialize]

FluentAssertions对于带有枚举但不是类的结构失败

1 个答案: