Unit tests for DefaultUnknownEnumConverter

StabilityMatrix.Tests/Core/DefaultUnknownEnumConverterTests.cs

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+using System.Text.Json;
+using System.Text.Json.Serialization;
+using StabilityMatrix.Core.Converters.Json;
+
+namespace StabilityMatrix.Tests.Core;
+
+[TestClass]
+public class DefaultUnknownEnumConverterTests
+{
+    [TestMethod]
+    [ExpectedException(typeof(JsonException))]
+    public void TestDeserialize_NormalEnum_ShouldError()
+    {
+        const string json = "\"SomeUnknownValue\"";
+
+        JsonSerializer.Deserialize<NormalEnum>(json);
+    }
+
+    [TestMethod]
+    public void TestDeserialize_UnknownEnum_ShouldConvert()
+    {
+        const string json = "\"SomeUnknownValue\"";
+
+        var result = JsonSerializer.Deserialize<UnknownEnum>(json);
+
+        Assert.AreEqual(UnknownEnum.Unknown, result);
+    }
+
+    [TestMethod]
+    public void TestDeserialize_DefaultEnum_ShouldConvert()
+    {
+        const string json = "\"SomeUnknownValue\"";
+
+        var result = JsonSerializer.Deserialize<DefaultEnum>(json);
+
+        Assert.AreEqual(DefaultEnum.CustomDefault, result);
+    }
+
+    [TestMethod]
+    public void TestSerialize_UnknownEnum_ShouldConvert()
+    {
+        const string expected = "\"Unknown\"";
+
+        var result = JsonSerializer.Serialize(UnknownEnum.Unknown);
+
+        Assert.AreEqual(expected, result);
+    }
+
+    [TestMethod]
+    public void TestSerialize_DefaultEnum_ShouldConvert()
+    {
+        const string expected = "\"CustomDefault\"";
+
+        var result = JsonSerializer.Serialize(DefaultEnum.CustomDefault);
+
+        Assert.AreEqual(expected, result);
+    }
+
+    private enum NormalEnum
+    {
+        Unknown,
+        Value1,
+        Value2
+    }
+
+    [JsonConverter(typeof(DefaultUnknownEnumConverter<UnknownEnum>))]
+    private enum UnknownEnum
+    {
+        Unknown,
+        Value1,
+        Value2
+    }
+
+    [JsonConverter(typeof(DefaultUnknownEnumConverter<DefaultEnum>))]
+    private enum DefaultEnum
+    {
+        CustomDefault,
+        Value1,
+        Value2
+    }
+}