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Fix MVC Core tests for CoreCLR GetCustomAttributes consistency #62872

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merged 4 commits into from
Jul 23, 2025
Merged

Fix MVC Core tests for CoreCLR GetCustomAttributes consistency #62872

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2752b68
Fixing ASP .NET test as discussed here https://github.com/dotnet/runt…
medhatiwari Jul 23, 2025
0222c7c
Replace hardcoded attribute count checks and specific attribute type …
medhatiwari Jul 23, 2025
4eabce6
Update src/Mvc/Mvc.Core/test/ModelBinding/Metadata/DefaultModelMetada…
jkotas Jul 23, 2025
efd8183
Update src/Mvc/Mvc.Core/test/ModelBinding/Metadata/ModelAttributesTes…
jkotas Jul 23, 2025
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10 changes: 8 additions & 2 deletions src/Mvc/Mvc.Core/test/ModelBinding/Metadata/DefaultModelMetadataProviderTest.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -211,8 +211,14 @@ public void GetMetadataForParameter_SuppliesEmptyAttributes_WhenParameterHasNoAt
// Assert
var defaultMetadata = Assert.IsType<DefaultModelMetadata>(metadata);

// Not exactly "no attributes" due to SerializableAttribute on object.
Assert.IsType<SerializableAttribute>(Assert.Single(defaultMetadata.Attributes.Attributes));
// Not exactly "no attributes" due to pseudo-attributes on object.
// After CoreCLR consistency fix, object.GetCustomAttributes() returns all pseudo-attributes.
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@jkotas jkotas Jul 23, 2025

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Should this test be deleted instead? It does not make sense for ASP.NET to test internal implementation details of CoreCLR.

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@medhatiwari medhatiwari Jul 23, 2025

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but looking at the name of the testcase
GetMetadataForParameter_SuppliesEmptyAttributes_WhenParameterHasNoAttributes and GetAttributesForParameter_NoAttributes the intent seems to be testing that a parameter with "no attributes" behaves correctly, so in this situation we either could just remove this testscase or Change the test to just verify that ParameterAttributes is empty (thats what I feel is the actual ASP.NET Core concern)

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@jkotas jkotas Jul 23, 2025

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Either way sounds good to me.

Assert.Equal(5, defaultMetadata.Attributes.Attributes.Count);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is SerializableAttribute);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "NullableContextAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "ClassInterfaceAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "ComVisibleAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "TypeForwardedFromAttribute");
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Using string comparison with GetType().Name for attribute type checking is fragile and could break if the attribute type is renamed or moved to a different namespace. Consider using typeof() comparison or checking if the attribute is assignable from the expected type.

Suggested change
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "NullableContextAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "ClassInterfaceAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "ComVisibleAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "TypeForwardedFromAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is NullableContextAttribute);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is ClassInterfaceAttribute);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is ComVisibleAttribute);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is TypeForwardedFromAttribute);

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Using string comparison with GetType().Name for attribute type checking is fragile and could break if the attribute type is renamed or moved to a different namespace. Consider using typeof() comparison or checking if the attribute is assignable from the expected type.

Suggested change
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "NullableContextAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "ClassInterfaceAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "ComVisibleAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "TypeForwardedFromAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType() == typeof(NullableContextAttribute));
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType() == typeof(ClassInterfaceAttribute));
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType() == typeof(ComVisibleAttribute));
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType() == typeof(TypeForwardedFromAttribute));

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Using string comparison with GetType().Name for attribute type checking is fragile and could break if the attribute type is renamed or moved to a different namespace. Consider using typeof() comparison or checking if the attribute is assignable from the expected type.

Suggested change
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "NullableContextAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "ClassInterfaceAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "ComVisibleAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "TypeForwardedFromAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is NullableContextAttribute);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is ClassInterfaceAttribute);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is ComVisibleAttribute);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is TypeForwardedFromAttribute);

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Using string comparison with GetType().Name for attribute type checking is fragile and could break if the attribute type is renamed or moved to a different namespace. Consider using typeof() comparison or checking if the attribute is assignable from the expected type.

Suggested change
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "NullableContextAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "ClassInterfaceAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "ComVisibleAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr.GetType().Name == "TypeForwardedFromAttribute");
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is System.Runtime.CompilerServices.NullableContextAttribute);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is System.Runtime.InteropServices.ClassInterfaceAttribute);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is System.Runtime.InteropServices.ComVisibleAttribute);
Assert.Contains(defaultMetadata.Attributes.Attributes, attr => attr is System.Runtime.CompilerServices.TypeForwardedFromAttribute);

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}

[Fact]
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10 changes: 8 additions & 2 deletions src/Mvc/Mvc.Core/test/ModelBinding/Metadata/ModelAttributesTest.cs
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Expand Up @@ -185,8 +185,14 @@ public void GetAttributesForParameter_NoAttributes()
.GetParameters()[0]);

// Assert
// Not exactly "no attributes" due to SerializableAttribute on object.
Assert.IsType<SerializableAttribute>(Assert.Single(attributes.Attributes));
// Not exactly "no attributes" due to pseudo-attributes on object.
// After CoreCLR consistency fix, object.GetCustomAttributes() returns all pseudo-attributes.
Assert.Equal(5, attributes.Attributes.Count);
Assert.Contains(attributes.Attributes, attr => attr is SerializableAttribute);
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "NullableContextAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "ClassInterfaceAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "ComVisibleAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "TypeForwardedFromAttribute");
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Using string comparison with GetType().Name for attribute type checking is fragile and could break if the attribute type is renamed or moved to a different namespace. Consider using typeof() comparison or checking if the attribute is assignable from the expected type.

Suggested change
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "NullableContextAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "ClassInterfaceAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "ComVisibleAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "TypeForwardedFromAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType() == Type.GetType("System.Runtime.CompilerServices.NullableContextAttribute"));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(System.Runtime.InteropServices.ClassInterfaceAttribute));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(System.Runtime.InteropServices.ComVisibleAttribute));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(System.Runtime.Serialization.TypeForwardedFromAttribute));

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Using string comparison with GetType().Name for attribute type checking is fragile and could break if the attribute type is renamed or moved to a different namespace. Consider using typeof() comparison or checking if the attribute is assignable from the expected type.

Suggested change
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "NullableContextAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "ClassInterfaceAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "ComVisibleAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "TypeForwardedFromAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(NullableContextAttribute));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(ClassInterfaceAttribute));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(ComVisibleAttribute));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(TypeForwardedFromAttribute));

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Using string comparison with GetType().Name for attribute type checking is fragile and could break if the attribute type is renamed or moved to a different namespace. Consider using typeof() comparison or checking if the attribute is assignable from the expected type.

Suggested change
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "NullableContextAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "ClassInterfaceAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "ComVisibleAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "TypeForwardedFromAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(NullableContextAttribute));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(ClassInterfaceAttribute));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(ComVisibleAttribute));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(TypeForwardedFromAttribute));

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Using string comparison with GetType().Name for attribute type checking is fragile and could break if the attribute type is renamed or moved to a different namespace. Consider using typeof() comparison or checking if the attribute is assignable from the expected type.

Suggested change
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "NullableContextAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "ClassInterfaceAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "ComVisibleAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType().Name == "TypeForwardedFromAttribute");
Assert.Contains(attributes.Attributes, attr => attr.GetType() == Type.GetType("System.Runtime.CompilerServices.NullableContextAttribute"));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(System.Runtime.InteropServices.ClassInterfaceAttribute));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(System.Runtime.InteropServices.ComVisibleAttribute));
Assert.Contains(attributes.Attributes, attr => attr.GetType() == typeof(System.Runtime.CompilerServices.TypeForwardedFromAttribute));

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Assert.Empty(attributes.ParameterAttributes);
Assert.Null(attributes.PropertyAttributes);
Assert.Equal(attributes.Attributes, attributes.TypeAttributes);
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