test: 补充 HashSetComparer 单元测试

Author: ArgoZhang

src/BootstrapBlazor/Misc/ModelComparer.cs

@@ -11,7 +11,7 @@ public class ModelEqualityComparerTest
     public void Equals_Ok()
     {
         Assert.True(IModelEqualityComparerExtensions.Equals<Foo>(null!, null, null));
-        Assert.False(IModelEqualityComparerExtensions.Equals<Foo>(null!, null, new Foo()));
-        Assert.False(IModelEqualityComparerExtensions.Equals<Foo>(null!, new Foo(), null));
+        Assert.False(IModelEqualityComparerExtensions.Equals(null!, null, new Foo()));
+        Assert.False(IModelEqualityComparerExtensions.Equals(null!, new Foo(), null));
     }
 }

test/UnitTest/Misc/ModelEqualityComparerTest.cs

@@ -0,0 +1,93 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the Apache 2.0 License
+// See the LICENSE file in the project root for more information.
+// Maintainer: Argo Zhang([email protected]) Website: https://www.blazor.zone
+
+using System.ComponentModel.DataAnnotations;
+
+namespace UnitTest.Utils;
+
+public class HasSetComparerTest : BootstrapBlazorTestBase
+{
+    [Fact]
+    public void GetHashCode_NoKey_Ok()
+    {
+        var comparer = new HashSetComparer<Dummy>(new MockModelEqualityComparer<Dummy>() { });
+
+        var obj = new Dummy() { Id = 1 };
+
+        // 未提供 KeyAttribute 标签内部等同 obj.GetHashCode()
+        Assert.Equal(obj.GetHashCode(), comparer.GetHashCode(obj));
+
+        // 空值相等
+        Assert.True(comparer.Equals(null, null));
+
+        // 未提供 ModelEqualityComparer 两个对象不相等
+        Assert.False(comparer.Equals(new Dummy() { Id = 1 }, new Dummy() { Id = 1 }));
+
+        // 空与非空比较
+        Assert.False(comparer.Equals(new Dummy(), null));
+        Assert.False(comparer.Equals(null, new Dummy()));
+    }
+
+    [Fact]
+    public void GetHashCode_Key_Ok()
+    {
+        var comparer = new HashSetComparer<Dog>(new MockModelEqualityComparer<Dog>() { });
+
+        var obj = new Dog() { Id = 1 };
+
+        // 提供 KeyAttribute 标签内部不等同 obj.GetHashCode()
+        Assert.NotEqual(1, obj.GetHashCode());
+        Assert.Equal(1, comparer.GetHashCode(obj));
+        Assert.True(comparer.Equals(new Dog() { Id = 1 }, new Dog() { Id = 1 }));
+
+        // 空值相等
+        Assert.True(comparer.Equals(null, null));
+
+        // 空与非空比较
+        Assert.False(comparer.Equals(new Dog(), null));
+        Assert.False(comparer.Equals(null, new Dog()));
+    }
+
+    [Fact]
+    public void GetHashCode_Comparer_Ok()
+    {
+        var comparer = new HashSetComparer<Dummy>(new MockModelEqualityComparer<Dummy>() { ModelEqualityComparer = (x, y) => x.Id == y.Id });
+
+        var obj = new Dummy() { Id = 1 };
+
+        // 未提供 KeyAttribute 标签内部等同 obj.GetHashCode()
+        Assert.Equal(obj.GetHashCode(), comparer.GetHashCode(obj));
+
+        // 空值相等
+        Assert.True(comparer.Equals(null, null));
+
+        // 提供 ModelEqualityComparer 两个对象相等
+        Assert.True(comparer.Equals(new Dummy() { Id = 1 }, new Dummy() { Id = 1 }));
+
+        // 空与非空比较
+        Assert.False(comparer.Equals(new Dummy(), null));
+        Assert.False(comparer.Equals(null, new Dummy()));
+    }
+
+    class Dummy
+    {
+        public int Id { get; set; }
+    }
+
+    class Dog
+    {
+        [Key]
+        public int Id { get; set; }
+    }
+
+    class MockModelEqualityComparer<TModel> : IModelEqualityComparer<TModel>
+    {
+        public Func<TModel, TModel, bool>? ModelEqualityComparer { get; set; }
+
+        public Type CustomKeyAttribute { get; set; } = typeof(KeyAttribute);
+
+        public bool Equals(TModel? x, TModel? y) => this.Equals<TModel>(x, y);
+    }
+}