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[release/8.0] Honor JsonSerializerOptions.PropertyNameCaseInsensitive…
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… in property name conflict resolution. (#93935)

* Honor JsonSerializerOptions.PropertyNameCaseInsensitive in property name conflict resolution.

* Update src/libraries/System.Text.Json/tests/Common/PropertyNameTests.cs

Co-authored-by: Jeff Handley <[email protected]>

* Address feedback

---------

Co-authored-by: Eirik Tsarpalis <[email protected]>
Co-authored-by: Jeff Handley <[email protected]>
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3 people authored Oct 24, 2023
1 parent 488a8a3 commit 59edaad
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Showing 6 changed files with 38 additions and 9 deletions.
Original file line number Diff line number Diff line change
Expand Up @@ -863,7 +863,7 @@ private List<PropertyGenerationSpec> ParsePropertyGenerationSpecs(
{
Location? typeLocation = typeToGenerate.Location;
List<PropertyGenerationSpec> properties = new();
PropertyHierarchyResolutionState state = new();
PropertyHierarchyResolutionState state = new(options);
hasExtensionDataProperty = false;

// Walk the type hierarchy starting from the current type up to the base type(s)
Expand Down Expand Up @@ -970,11 +970,10 @@ bool PropertyIsOverriddenAndIgnored(IPropertySymbol property, Dictionary<string,
}
}

private ref struct PropertyHierarchyResolutionState
private ref struct PropertyHierarchyResolutionState(SourceGenerationOptionsSpec? options)
{
public PropertyHierarchyResolutionState() { }
public readonly List<int> Properties = new();
public Dictionary<string, (PropertyGenerationSpec, ISymbol, int index)> AddedProperties = new();
public Dictionary<string, (PropertyGenerationSpec, ISymbol, int index)> AddedProperties = new(options?.PropertyNameCaseInsensitive == true ? StringComparer.OrdinalIgnoreCase : StringComparer.Ordinal);
public Dictionary<string, ISymbol>? IgnoredMembers;
public bool IsPropertyOrderSpecified;
public bool HasInvalidConfigurationForFastPath;
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Expand Up @@ -88,7 +88,7 @@ private static void PopulateProperties(JsonTypeInfo typeInfo)
bool constructorHasSetsRequiredMembersAttribute =
typeInfo.Converter.ConstructorInfo?.HasSetsRequiredMembersAttribute() ?? false;

JsonTypeInfo.PropertyHierarchyResolutionState state = new();
JsonTypeInfo.PropertyHierarchyResolutionState state = new(typeInfo.Options);

// Walk the type hierarchy starting from the current type up to the base type(s)
foreach (Type currentType in typeInfo.Type.GetSortedTypeHierarchy())
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Expand Up @@ -137,7 +137,7 @@ internal static void PopulateProperties(JsonTypeInfo typeInfo, JsonTypeInfo.Json

// Regardless of the source generator we need to re-run the naming conflict resolution algorithm
// at run time since it is possible that the naming policy or other configs can be different then.
JsonTypeInfo.PropertyHierarchyResolutionState state = new();
JsonTypeInfo.PropertyHierarchyResolutionState state = new(typeInfo.Options);

foreach (JsonPropertyInfo jsonPropertyInfo in properties)
{
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Expand Up @@ -992,10 +992,9 @@ public JsonPropertyInfo CreateJsonPropertyInfo(Type propertyType, string name)
internal abstract ValueTask<object?> DeserializeAsObjectAsync(Stream utf8Json, CancellationToken cancellationToken);
internal abstract object? DeserializeAsObject(Stream utf8Json);

internal ref struct PropertyHierarchyResolutionState
internal ref struct PropertyHierarchyResolutionState(JsonSerializerOptions options)
{
public PropertyHierarchyResolutionState() { }
public Dictionary<string, (JsonPropertyInfo, int index)> AddedProperties = new();
public Dictionary<string, (JsonPropertyInfo, int index)> AddedProperties = new(options.PropertyNameCaseInsensitive ? StringComparer.OrdinalIgnoreCase : StringComparer.Ordinal);
public Dictionary<string, JsonPropertyInfo>? IgnoredProperties;
public bool IsPropertyOrderSpecified;
}
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29 changes: 29 additions & 0 deletions src/libraries/System.Text.Json/tests/Common/PropertyNameTests.cs
Original file line number Diff line number Diff line change
Expand Up @@ -494,5 +494,34 @@ public class ClassWithSpecialCharacters
[JsonPropertyName("\uA000_2")] // Valid C# property name: \uA000_2
public int YiIt_2 { get; set; }
}

[Theory]
[InlineData(false)]
[InlineData(true)]
public async Task ClassWithIgnoredCaseInsensitiveConflict_RespectsIgnoredMember(bool propertyNameCaseInsensitive)
{
// Regression test for https://github.com/dotnet/runtime/issues/93903
// specifically for propertyNameCaseInsensitive := true

JsonSerializerOptions options = Serializer.CreateOptions(makeReadOnly: false);
options.PropertyNameCaseInsensitive = propertyNameCaseInsensitive;

var value = new ClassWithIgnoredCaseInsensitiveConflict { name = "lowercase", Name = "uppercase" };
string json = await Serializer.SerializeWrapper(value, options);

Assert.Equal("""{"name":"lowercase"}""", json);

value = await Serializer.DeserializeWrapper<ClassWithIgnoredCaseInsensitiveConflict>(json, options);
Assert.Equal("lowercase", value.name);
Assert.Null(value.Name);
}

public class ClassWithIgnoredCaseInsensitiveConflict
{
public string name { get; set; }

[JsonIgnore]
public string Name { get; set; }
}
}
}
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Expand Up @@ -28,6 +28,7 @@ public PropertyNameTests_Metadata()
[JsonSerializable(typeof(ObjectPropertyNamesDifferentByCaseOnly_TestClass))]
[JsonSerializable(typeof(OverridePropertyNameDesignTime_TestClass))]
[JsonSerializable(typeof(SimpleTestClass))]
[JsonSerializable(typeof(ClassWithIgnoredCaseInsensitiveConflict))]
internal sealed partial class PropertyNameTestsContext_Metadata : JsonSerializerContext
{
}
Expand All @@ -53,6 +54,7 @@ public PropertyNameTests_Default()
[JsonSerializable(typeof(ObjectPropertyNamesDifferentByCaseOnly_TestClass))]
[JsonSerializable(typeof(OverridePropertyNameDesignTime_TestClass))]
[JsonSerializable(typeof(SimpleTestClass))]
[JsonSerializable(typeof(ClassWithIgnoredCaseInsensitiveConflict))]
internal sealed partial class PropertyNameTestsContext_Default : JsonSerializerContext
{
}
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