Validation tests for assets improved.

src/Squidex.Domain.Apps.Entities/Assets/Guards/GuardAsset.cs

@@ -25,7 +25,7 @@ namespace Squidex.Domain.Apps.Entities.Assets.Guards
 
                 if (string.Equals(command.FileName, oldName))
                 {
-                    error(new ValidationError("Name is equal to old name.", nameof(command.FileName)));
+                    error(new ValidationError("Asset has already this name.", nameof(command.FileName)));
                 }
             });
         }

tests/Squidex.Domain.Apps.Entities.Tests/Assets/Guards/GuardAssetTests.cs

@@ -6,6 +6,7 @@
 // ==========================================================================
 
 using Squidex.Domain.Apps.Entities.Assets.Commands;
+using Squidex.Domain.Apps.Entities.TestHelpers;
 using Squidex.Infrastructure;
 using Xunit;
 
@@ -18,7 +19,8 @@ namespace Squidex.Domain.Apps.Entities.Assets.Guards
         {
             var command = new RenameAsset();
 
-            Assert.Throws<ValidationException>(() => GuardAsset.CanRename(command, "asset-name"));
+            ValidationAssert.Throws(() => GuardAsset.CanRename(command, "asset-name"),
+                new ValidationError("Name is required.", "FileName"));
         }
 
         [Fact]
@@ -26,7 +28,8 @@ namespace Squidex.Domain.Apps.Entities.Assets.Guards
         {
             var command = new RenameAsset { FileName = "asset-name" };
 
-            Assert.Throws<ValidationException>(() => GuardAsset.CanRename(command, "asset-name"));
+            ValidationAssert.Throws(() => GuardAsset.CanRename(command, "asset-name"),
+                new ValidationError("Asset has already this name.", "FileName"));
         }
 
         [Fact]