Add `UnitOfWorkExtensions_Tests`

Resolve #12260

framework/src/Volo.Abp.Uow/Volo/Abp/Uow/UnitOfWorkExtensions.cs

@@ -34,7 +34,7 @@ public static class UnitOfWorkExtensions
     {
         Check.NotNull(unitOfWork, nameof(unitOfWork));
 
-        return unitOfWork.Items.FirstOrDefault(x => x.Key == key).As<TValue>();
+        return unitOfWork.Items.FirstOrDefault(x => x.Key == key).Value.As<TValue>();
     }
 
     public static TValue GetOrAddItem<TValue>([NotNull] this IUnitOfWork unitOfWork, string key, Func<string, TValue> factory)

framework/test/Volo.Abp.Uow.Tests/Volo/Abp/Uow/UnitOfWorkExtensions_Tests.cs

@@ -0,0 +1,58 @@
+using Shouldly;
+using Volo.Abp.Testing;
+using Xunit;
+
+namespace Volo.Abp.Uow;
+
+public class UnitOfWorkExtensions_Tests : AbpIntegratedTest<AbpUnitOfWorkModule>
+{
+    private readonly IUnitOfWorkManager _unitOfWorkManager;
+
+    public UnitOfWorkExtensions_Tests()
+    {
+        _unitOfWorkManager = GetRequiredService<IUnitOfWorkManager>();
+    }
+
+    [Fact]
+    public void AddItem()
+    {
+        var uow = _unitOfWorkManager.Begin();
+        uow.AddItem("testKey", "testValue");
+
+        uow.Items.ShouldContainKey("testKey");
+        uow.Items.ContainsValue("testValue");
+    }
+
+    [Fact]
+    public void GetItemOrDefault()
+    {
+        var uow = _unitOfWorkManager.Begin();
+        uow.Items.Add("testKey", new NameValue("TestKey","TestValue"));
+
+        uow.GetItemOrDefault<NameValue>("testKey").ShouldBeOfType<NameValue>();
+        uow.GetItemOrDefault<NameValue>("testKey").Value.ShouldBe("TestValue");
+    }
+
+    [Fact]
+    public void GetOrAddItem()
+    {
+        var uow = _unitOfWorkManager.Begin();
+
+        var item = uow.GetOrAddItem("testKey", _ => new NameValue("TestKey", "TestValue"));
+
+        item.Name.ShouldBe("TestKey");
+        item.ShouldBeOfType<NameValue>();
+        item.Value.ShouldBe("TestValue");
+    }
+
+    [Fact]
+    public void RemoveItem()
+    {
+        var uow = _unitOfWorkManager.Begin();
+        uow.Items.Add("testKey", "testValue");
+
+        uow.RemoveItem("testKey");
+
+        uow.Items.ShouldNotContainKey("testKey");
+    }
+}