1.6 DitherAlgorithm value type

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-06-07 14:10:43 +02:00
parent fa0081b923
commit 1b236e03af
3 changed files with 98 additions and 1 deletions
--- a/tests/FrameProcessor.Tests/DitherAlgorithmTests.cs
+++ b/tests/FrameProcessor.Tests/DitherAlgorithmTests.cs
@@ -0,0 +1,57 @@
+using System.Text.Json;
+using FrameProcessor.Domain;
+
+namespace FrameProcessor.Tests;
+
+public class DitherAlgorithmTests
+{
+    [Theory]
+    [InlineData("\"floyd-steinberg\"", DitherAlgorithm.FloydSteinberg)]
+    [InlineData("\"atkinson\"", DitherAlgorithm.Atkinson)]
+    [InlineData("\"stucki\"", DitherAlgorithm.Stucki)]
+    [InlineData("\"jarvis\"", DitherAlgorithm.Jarvis)]
+    public void JsonDeserialize_KebabCaseLowercase(string json, DitherAlgorithm expected)
+    {
+        var value = JsonSerializer.Deserialize<DitherAlgorithm>(json);
+        Assert.Equal(expected, value);
+    }
+
+    [Theory]
+    [InlineData(DitherAlgorithm.FloydSteinberg, "\"floyd-steinberg\"")]
+    [InlineData(DitherAlgorithm.Atkinson, "\"atkinson\"")]
+    [InlineData(DitherAlgorithm.Stucki, "\"stucki\"")]
+    [InlineData(DitherAlgorithm.Jarvis, "\"jarvis\"")]
+    public void JsonSerialize_KebabCaseLowercase(DitherAlgorithm value, string expected)
+    {
+        var json = JsonSerializer.Serialize(value);
+        Assert.Equal(expected, json);
+    }
+
+    [Theory]
+    [InlineData("\"FloydSteinberg\"")]
+    [InlineData("\"floyd_steinberg\"")]
+    [InlineData("\"FLOYD-STEINBERG\"")]
+    [InlineData("\"sierra\"")]
+    [InlineData("\"\"")]
+    public void JsonDeserialize_RejectsInvalid(string json)
+    {
+        Assert.Throws<JsonException>(() => JsonSerializer.Deserialize<DitherAlgorithm>(json));
+    }
+
+    [Fact]
+    public void JsonRoundTrip_PreservesValue()
+    {
+        foreach (var value in new[]
+        {
+            DitherAlgorithm.FloydSteinberg,
+            DitherAlgorithm.Atkinson,
+            DitherAlgorithm.Stucki,
+            DitherAlgorithm.Jarvis,
+        })
+        {
+            var json = JsonSerializer.Serialize(value);
+            var roundTripped = JsonSerializer.Deserialize<DitherAlgorithm>(json);
+            Assert.Equal(value, roundTripped);
+        }
+    }
+}