Reject non-generic collections and add tests

Resolve #24914

framework/src/Volo.Abp.ObjectMapping/Volo/Abp/ObjectMapping/ObjectMappingHelper.cs

@@ -59,6 +59,13 @@ public static class ObjectMappingHelper
             supportedCollectionTypes.Contains(type.GetGenericTypeDefinition()) ||
             type.GetInterfaces().Any(i => i.IsGenericType && supportedCollectionTypes.Contains(i.GetGenericTypeDefinition())))
         {
+            if (!type.IsGenericType)
+            {
+                elementType = null!;
+                definitionGenericType = null!;
+                return false;
+            }
+
             elementType = type.GetGenericArguments()[0];
             definitionGenericType = type.GetGenericTypeDefinition();
             if (definitionGenericType == typeof(IEnumerable<>) ||

framework/test/Volo.Abp.ObjectMapping.Tests/Volo/Abp/ObjectMapping/ObjectMappingHelper_Tests.cs

@@ -0,0 +1,84 @@
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using Shouldly;
+using Xunit;
+
+namespace Volo.Abp.ObjectMapping;
+
+public class ObjectMappingHelper_Tests
+{
+    [Fact]
+    public void IsCollectionGenericType_Should_Return_True_For_Standard_GenericCollection()
+    {
+        var result = ObjectMappingHelper.IsCollectionGenericType<List<MappingTestSource>, List<MappingTestDestination>>(
+            out var sourceArg, out var destArg, out var defGenericType);
+
+        result.ShouldBeTrue();
+        sourceArg.ShouldBe(typeof(MappingTestSource));
+        destArg.ShouldBe(typeof(MappingTestDestination));
+        defGenericType.ShouldBe(typeof(List<>));
+    }
+
+    [Fact]
+    public void IsCollectionGenericType_Should_Return_True_For_Array()
+    {
+        var result = ObjectMappingHelper.IsCollectionGenericType<MappingTestSource[], MappingTestDestination[]>(
+            out var sourceArg, out var destArg, out _);
+
+        result.ShouldBeTrue();
+        sourceArg.ShouldBe(typeof(MappingTestSource));
+        destArg.ShouldBe(typeof(MappingTestDestination));
+    }
+
+    [Fact]
+    public void IsCollectionGenericType_Should_Normalize_IEnumerable_To_List()
+    {
+        var result = ObjectMappingHelper.IsCollectionGenericType<IEnumerable<MappingTestSource>, IEnumerable<MappingTestDestination>>(
+            out _, out _, out var defGenericType);
+
+        result.ShouldBeTrue();
+        defGenericType.ShouldBe(typeof(List<>));
+    }
+
+    [Fact]
+    public void IsCollectionGenericType_Should_Normalize_ICollection_To_Collection()
+    {
+        var result = ObjectMappingHelper.IsCollectionGenericType<ICollection<MappingTestSource>, ICollection<MappingTestDestination>>(
+            out _, out _, out var defGenericType);
+
+        result.ShouldBeTrue();
+        defGenericType.ShouldBe(typeof(Collection<>));
+    }
+
+    [Fact]
+    public void IsCollectionGenericType_Should_Return_False_For_NonCollection()
+    {
+        var result = ObjectMappingHelper.IsCollectionGenericType<MappingTestSource, MappingTestDestination>(
+            out _, out _, out _);
+
+        result.ShouldBeFalse();
+    }
+
+    [Fact]
+    public void IsCollectionGenericType_Should_Return_False_For_NonGeneric_DerivedCollection()
+    {
+        var result = ObjectMappingHelper.IsCollectionGenericType<List<MappingTestSource>, MappingTestDestinationList>(
+            out _, out _, out _);
+
+        result.ShouldBeFalse();
+    }
+}
+
+public class MappingTestSource
+{
+    public string Value { get; set; } = "";
+}
+
+public class MappingTestDestination
+{
+    public string Value { get; set; } = "";
+}
+
+public class MappingTestDestinationList : List<MappingTestDestination>
+{
+}