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Code Issues Releases Wiki Activity

Updated Enum converter to only warn once per type for null/empty value for non-nullable enum property

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This commit is contained in:
Jkorf 2026-03-30 11:34:02 +02:00
parent d6b680d42e
commit acca3468f3
3 changed files with 42 additions and 10 deletions
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34
CryptoExchange.Net.UnitTests/SystemTextJsonConverterTests.cs
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@ -1,11 +1,15 @@
using CryptoExchange.Net.Attributes;
using CryptoExchange.Net.Converters;
using CryptoExchange.Net.Converters.SystemTextJson;
using System.Text.Json;
using CryptoExchange.Net.Objects;
using CryptoExchange.Net.SharedApis;
using CryptoExchange.Net.Testing;
using Newtonsoft.Json.Linq;
using NUnit.Framework;
using System;
using System.Diagnostics;
using System.Text.Json;
using System.Text.Json.Serialization;
using CryptoExchange.Net.Converters;
using CryptoExchange.Net.SharedApis;
namespace CryptoExchange.Net.UnitTests
{
@ -185,6 +189,30 @@ namespace CryptoExchange.Net.UnitTests
Assert.That(result == expected);
}
[Test]
public void TestEnumConverterParseNullOnNonNullableOnlyLogsOnce()
{
LibraryHelpers.StaticLogger = new TraceLogger();
var listener = new EnumValueTraceListener();
Trace.Listeners.Add(listener);
try
{
Assert.Throws<Exception>(() =>
{
var result = JsonSerializer.Deserialize<NotNullableSTJEnumObject>("{\"Value\": null}", SerializerOptions.WithConverters(new SerializationContext()));
});
Assert.DoesNotThrow(() =>
{
var result2 = JsonSerializer.Deserialize<NotNullableSTJEnumObject>("{\"Value\": null}", SerializerOptions.WithConverters(new SerializationContext()));
});
}
finally
{
Trace.Listeners.Remove(listener);
}
}
[TestCase("1", true)]
[TestCase("true", true)]
[TestCase("yes", true)]

14
CryptoExchange.Net/Converters/SystemTextJson/EnumConverter.cs
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@ -120,13 +120,14 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
/// <inheritdoc />
public override T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
var t = ReadNullable(ref reader, typeToConvert, options, out var isEmptyString);
var t = ReadNullable(ref reader, typeToConvert, options, out var isEmptyStringOrNull);
if (t != null)
return t.Value;
if (isEmptyString && !_unknownValuesWarned.Contains(null))
if (isEmptyStringOrNull && !_unknownValuesWarned.Contains(null))
{
// We received an empty string and have no mapping for it, and the property isn't nullable
_unknownValuesWarned.Add(null!);
LibraryHelpers.StaticLogger?.LogWarning($"Received null or empty enum value, but property type is not a nullable enum. EnumType: {typeof(T).FullName}. If you think {typeof(T).FullName} should be nullable please open an issue on the Github repo");
}
@ -149,9 +150,9 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
return (T)_undefinedEnumValue;
}
private T? ReadNullable(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options, out bool isEmptyString)
private T? ReadNullable(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options, out bool isEmptyStringOrNull)
{
isEmptyString = false;
isEmptyStringOrNull = false;
var enumType = typeof(T);
if (_mappingToEnum == null)
CreateMapping();
@ -167,13 +168,16 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
};
if (stringValue is null)
{
isEmptyStringOrNull = true;
return null;
}
if (!GetValue(enumType, stringValue, out var result))
{
if (string.IsNullOrWhiteSpace(stringValue))
{
isEmptyString = true;
isEmptyStringOrNull = true;
}
else
{

4
CryptoExchange.Net/Testing/EnumValueTraceListener.cs
View File

@ -13,7 +13,7 @@ namespace CryptoExchange.Net.Testing
if (message.Contains("Cannot map"))
throw new Exception("Enum value error: " + message);
if (message.Contains("Received null enum value"))
if (message.Contains("Received null or empty enum value"))
throw new Exception("Enum null error: " + message);
}
@ -25,7 +25,7 @@ namespace CryptoExchange.Net.Testing
if (message.Contains("Cannot map"))
throw new Exception("Enum value error: " + message);
if (message.Contains("Received null enum value"))
if (message.Contains("Received null or empty enum value"))
throw new Exception("Enum null error: " + message);
}
}