Refactor collection type handling in ObjectMappingHelper and enhance tests for mapping collections

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

@@ -28,16 +28,17 @@ public static class ObjectMappingHelper
 
     private static (Type, Type, Type)? IsCollectionGenericTypeInternal<TSource, TDestination>()
     {
-        Type sourceArgumentType = null!;
-        Type destinationArgumentType = null!;
-        Type definitionGenericType = null!;
-
-        if ((!typeof(TSource).IsGenericType && !typeof(TSource).IsArray) ||
-            (!typeof(TDestination).IsGenericType && !typeof(TDestination).IsArray))
+        if (!IsCollectionGenericTypeInternal(typeof(TSource), out var sourceArgumentType, out _) ||
+            !IsCollectionGenericTypeInternal(typeof(TDestination), out var destinationArgumentType, out var definitionGenericType))
         {
             return null;
         }
 
+        return (sourceArgumentType, destinationArgumentType, definitionGenericType);
+    }
+
+    private static bool IsCollectionGenericTypeInternal(Type type, out Type elementType, out Type definitionGenericType)
+    {
         var supportedCollectionTypes = new[]
         {
             typeof(IEnumerable<>),
@@ -47,39 +48,34 @@ public static class ObjectMappingHelper
             typeof(List<>)
         };
 
-        if (typeof(TSource).IsGenericType && supportedCollectionTypes.Any(x => x == typeof(TSource).GetGenericTypeDefinition()))
-        {
-            sourceArgumentType = typeof(TSource).GenericTypeArguments[0];
-        }
-
-        if (typeof(TSource).IsArray)
-        {
-            sourceArgumentType = typeof(TSource).GetElementType()!;
-        }
-
-        if (sourceArgumentType == null)
+        if (type.IsArray)
         {
-            return null;
+            elementType = type.GetElementType()!;
+            definitionGenericType = type;
+            return true;
         }
 
-        definitionGenericType = typeof(List<>);
-        if (typeof(TDestination).IsGenericType && supportedCollectionTypes.Any(x => x == typeof(TDestination).GetGenericTypeDefinition()))
+        if (type.IsGenericType &&
+            supportedCollectionTypes.Contains(type.GetGenericTypeDefinition()) ||
+            type.GetInterfaces().Any(i => i.IsGenericType && supportedCollectionTypes.Contains(i.GetGenericTypeDefinition())))
         {
-            destinationArgumentType = typeof(TDestination).GenericTypeArguments[0];
+            elementType = type.GetGenericArguments()[0];
+            definitionGenericType = type.GetGenericTypeDefinition();
+            if (definitionGenericType == typeof(IEnumerable<>) ||
+                definitionGenericType == typeof(IList<>))
+            {
+                definitionGenericType = typeof(List<>);
+            }
 
-            if (typeof(TDestination).GetGenericTypeDefinition() == typeof(ICollection<>) ||
-                typeof(TDestination).GetGenericTypeDefinition() == typeof(Collection<>))
+            if (definitionGenericType == typeof(ICollection<>))
             {
                 definitionGenericType = typeof(Collection<>);
             }
+            return true;
         }
 
-        if (typeof(TDestination).IsArray)
-        {
-            destinationArgumentType = typeof(TDestination).GetElementType()!;
-            definitionGenericType = typeof(Array);
-        }
-
-        return (sourceArgumentType, destinationArgumentType, definitionGenericType);
+        elementType = null!;
+        definitionGenericType = null!;
+        return false;
     }
 }

framework/test/Volo.Abp.Mapperly.Tests/Volo/Abp/Mapperly/AbpMapperlyModule_Basic_Tests.cs

@@ -1,5 +1,7 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices.JavaScript;
 using Microsoft.Extensions.DependencyInjection;
 using Shouldly;
 using Volo.Abp.Mapperly.SampleClasses;
@@ -55,13 +57,23 @@ public class AbpMapperlyModule_Basic_Tests : AbpIntegratedTest<MapperlyTestModul
         dto[0].Number.ShouldBe(42);
         dto[1].Number.ShouldBe(43);
 
+        var dto2 = _objectMapper.Map<IReadOnlyList<MyEntity>, MyEntityDto[]>(new List<MyEntity>
+        {
+            new MyEntity { Number = 42 },
+            new MyEntity { Number = 43 }
+        }.AsReadOnly());
+
+        dto2.Length.ShouldBe(2);
+        dto2[0].Number.ShouldBe(42);
+        dto2[1].Number.ShouldBe(43);
+
         var dtoList = new List<MyEntityDto>();
         {
             new MyEntityDto() { Number = 44 };
             new MyEntityDto() { Number = 45 };
         }
 
-        dto = _objectMapper.Map<List<MyEntity>, List<MyEntityDto>>(new List<MyEntity>
+        _objectMapper.Map<List<MyEntity>, List<MyEntityDto>>(new List<MyEntity>
         {
             new MyEntity { Number = 42 },
             new MyEntity { Number = 43 }
@@ -70,6 +82,17 @@ public class AbpMapperlyModule_Basic_Tests : AbpIntegratedTest<MapperlyTestModul
         dtoList.Count.ShouldBe(2);
         dtoList[0].Number.ShouldBe(42);
         dtoList[1].Number.ShouldBe(43);
+
+        var dtoArray = dtoList.ToArray();
+        _objectMapper.Map<IReadOnlyList<MyEntity>, MyEntityDto[]>(new List<MyEntity>
+        {
+            new MyEntity { Number = 42 },
+            new MyEntity { Number = 43 }
+        }.AsReadOnly(), dtoArray);
+
+        dtoArray.Length.ShouldBe(2);
+        dtoArray[0].Number.ShouldBe(42);
+        dtoArray[1].Number.ShouldBe(43);
     }
 
     [Fact]