test

dotnet/tests/Microsoft.Agents.AI.A2A.UnitTests/Extensions/A2AMetadataExtensionsTests.cs

@@ -0,0 +1,67 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System.Collections.Generic;
+using System.Text.Json;
+using A2A;
+
+namespace Microsoft.Agents.AI.A2A.UnitTests;
+
+/// <summary>
+/// Unit tests for the <see cref="A2AMetadataExtensions"/> class.
+/// </summary>
+public sealed class A2AMetadataExtensionsTests
+{
+    [Fact]
+    public void ToAdditionalProperties_WithNullMetadata_ReturnsNull()
+    {
+        // Arrange
+        Dictionary<string, JsonElement>? metadata = null;
+
+        // Act
+        var result = metadata.ToAdditionalProperties();
+
+        // Assert
+        Assert.Null(result);
+    }
+
+    [Fact]
+    public void ToAdditionalProperties_WithEmptyMetadata_ReturnsNull()
+    {
+        // Arrange
+        var metadata = new Dictionary<string, JsonElement>();
+
+        // Act
+        var result = metadata.ToAdditionalProperties();
+
+        // Assert
+        Assert.Null(result);
+    }
+
+    [Fact]
+    public void ToAdditionalProperties_WithMultipleProperties_ReturnsAdditionalPropertiesDictionaryWithAllProperties()
+    {
+        // Arrange
+        var metadata = new Dictionary<string, JsonElement>
+        {
+            { "stringKey", JsonSerializer.SerializeToElement("stringValue") },
+            { "numberKey", JsonSerializer.SerializeToElement(42) },
+            { "booleanKey", JsonSerializer.SerializeToElement(true) }
+        };
+
+        // Act
+        var result = metadata.ToAdditionalProperties();
+
+        // Assert
+        Assert.NotNull(result);
+        Assert.Equal(3, result.Count);
+
+        Assert.True(result.ContainsKey("stringKey"));
+        Assert.Equal("stringValue", ((JsonElement)result["stringKey"]!).GetString());
+
+        Assert.True(result.ContainsKey("numberKey"));
+        Assert.Equal(42, ((JsonElement)result["numberKey"]!).GetInt32());
+
+        Assert.True(result.ContainsKey("booleanKey"));
+        Assert.True(((JsonElement)result["booleanKey"]!).GetBoolean());
+    }
+}