Add Conformance tests for the server (#983)

tests/ModelContextProtocol.ConformanceServer/Resources/ConformanceResources.cs

@@ -0,0 +1,72 @@
+using ModelContextProtocol.Protocol;
+using ModelContextProtocol.Server;
+using System.ComponentModel;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace ConformanceServer.Resources;
+
+[McpServerResourceType]
+public class ConformanceResources
+{
+    // Sample base64 encoded 1x1 red PNG pixel for testing
+    private const string TestImageBase64 =
+        "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8DwHwAFBQIAX8jx0gAAAABJRU5ErkJggg==";
+
+    /// <summary>
+    /// Static text resource for testing
+    /// </summary>
+    [McpServerResource(UriTemplate = "test://static-text", Name = "Static Text Resource", MimeType = "text/plain")]
+    [Description("A static text resource for testing")]
+    public static string StaticText()
+    {
+        return "This is the content of the static text resource.";
+    }
+
+    /// <summary>
+    /// Static binary resource (image) for testing
+    /// </summary>
+    [McpServerResource(UriTemplate = "test://static-binary", Name = "Static Binary Resource", MimeType = "image/png")]
+    [Description("A static binary resource (image) for testing")]
+    public static BlobResourceContents StaticBinary()
+    {
+        return new BlobResourceContents
+        {
+            Uri = "test://static-binary",
+            MimeType = "image/png",
+            Blob = TestImageBase64
+        };
+    }
+
+    /// <summary>
+    /// Resource template with parameter substitution
+    /// </summary>
+    [McpServerResource(UriTemplate = "test://template/{id}/data", Name = "Resource Template", MimeType = "application/json")]
+    [Description("A resource template with parameter substitution")]
+    public static TextResourceContents TemplateResource(string id)
+    {
+        var data = new ResourceData(id, true, $"Data for ID: {id}");
+
+        return new TextResourceContents
+        {
+            Uri = $"test://template/{id}/data",
+            MimeType = "application/json",
+            Text = JsonSerializer.Serialize(data, JsonContext.Default.ResourceData)
+        };
+    }
+
+    /// <summary>
+    /// Subscribable resource that can send updates
+    /// </summary>
+    [McpServerResource(UriTemplate = "test://watched-resource", Name = "Watched Resource", MimeType = "text/plain")]
+    [Description("A resource that auto-updates every 3 seconds")]
+    public static string WatchedResource()
+    {
+        return "Watched resource content";
+    }
+}
+
+record ResourceData(string Id, bool TemplateTest, string Data);
+
+[JsonSerializable(typeof(ResourceData))]
+internal partial class JsonContext : JsonSerializerContext;