feat: add serialization tests for CharacterLocationCitation, CitationDelta, ContentBlockLocationCitation, PageLocationCitation, and DocumentContent classes

tests/AnthropicClient.Tests/Unit/Models/CharacterLocationCitationTests.cs

@@ -1,7 +1,16 @@
 namespace AnthropicClient.Tests.Unit.Models;
 
-public class CharacterLocationCitationTests
+public class CharacterLocationCitationTests : SerializationTest
 {
+  private readonly string _testJson = @"{
+    ""type"": ""char_location"",
+    ""cited_text"": ""cited text"",
+    ""document_index"": 1,
+    ""document_title"": ""document title"",
+    ""start_char_index"": 2,
+    ""end_char_index"": 3
+  }";
+
   [Fact]
   public void Constructor_WhenCalled_ItShouldSetProperties()
   {
@@ -14,4 +23,36 @@ public class CharacterLocationCitationTests
     result.StartCharIndex.Should().Be(0);
     result.EndCharIndex.Should().Be(0);
   }
+
+  [Fact]
+  public void JsonSerialization_WhenSerialized_ItShouldHaveExpectedShape()
+  {
+    var citation = new CharacterLocationCitation
+    {
+      Type = "char_location",
+      CitedText = "cited text",
+      DocumentIndex = 1,
+      DocumentTitle = "document title",
+      StartCharIndex = 2,
+      EndCharIndex = 3
+    };
+
+    var result = Serialize<Citation>(citation);
+
+    JsonAssert.Equal(_testJson, result);
+  }
+
+  [Fact]
+  public void JsonDeserialization_WhenDeserialized_ItShouldHaveExpectedShape()
+  {
+    var citation = Deserialize<Citation>(_testJson);
+
+    var characterLocationCitation = citation.As<CharacterLocationCitation>();
+    characterLocationCitation!.Type.Should().Be("char_location");
+    characterLocationCitation.CitedText.Should().Be("cited text");
+    characterLocationCitation.DocumentIndex.Should().Be(1);
+    characterLocationCitation.DocumentTitle.Should().Be("document title");
+    characterLocationCitation.StartCharIndex.Should().Be(2);
+    characterLocationCitation.EndCharIndex.Should().Be(3);
+  }
 }