Enums do not require type maps. (#160)

Author: BlaiseD

src/AutoMapper.Extensions.ExpressionMapping/TypeMapHelper.cs

@@ -28,9 +28,14 @@ public static bool CanMapConstant(this IConfigurationProvider config, Type sourc
                 return config.CanMapConstant(sourceType.GetElementType(), destType.GetElementType());
             else if (BothTypesAreEnumerable())
                 return config.CanMapConstant(sourceType.GetGenericArguments()[0], destType.GetGenericArguments()[0]);
+            else if (BothTypesAreEnums())
+                return true;
             else
                 return config.Internal().ResolveTypeMap(sourceType, destType) != null;
 
+            bool BothTypesAreEnums()
+                => sourceType.IsEnum && destType.IsEnum;
+
             bool BothTypesAreEnumerable()
             {
                 Type enumerableType = typeof(System.Collections.IEnumerable);

tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapExpressionWithListConstants.cs

@@ -48,7 +48,6 @@ public void Map_expression_with_constant_list_using_generic_list_dot_contains()
                 cfg =>
                 {
                     cfg.CreateMap<EntityModel, Entity>();
-                    cfg.CreateMap<SimpleEnum, SimpleEnumModel>();
                 }
             );
             config.AssertConfigurationIsValid();
@@ -79,7 +78,6 @@ public void Map_expression_with_constant_list_using_generic_enumerable_dot_conta
                 cfg =>
                 {
                     cfg.CreateMap<EntityModel, Entity>();
-                    cfg.CreateMap<SimpleEnum, SimpleEnumModel>();
                 }
             );
             config.AssertConfigurationIsValid();
@@ -110,7 +108,6 @@ public void Map_expression_with_constant_dictionary()
                 cfg =>
                 {
                     cfg.CreateMap<EntityModel, Entity>();
-                    cfg.CreateMap<SimpleEnum, SimpleEnumModel>();
                 }
             );
             config.AssertConfigurationIsValid();
@@ -142,7 +139,6 @@ public void Map_expression_with_constant_dictionary_mapping_both_Key_and_value()
                 {
                     cfg.CreateMap<EntityModel, Entity>();
                     cfg.CreateMap<Entity, EntityModel>();
-                    cfg.CreateMap<SimpleEnum, SimpleEnumModel>();
                 }
             );
             config.AssertConfigurationIsValid();