fix: fix IntegrationTests by using the newly added TestPushNotificationSender, thus addressing url validation problems with push notification related tests

Signed-off-by: Charles d'Avernas <[email protected]>

Author: cdavernas

tests/a2a-net.IntegrationTests/A2AWebServerStartup.cs

@@ -56,7 +56,8 @@ public override void ConfigureServices(IServiceCollection services)
                 .SupportsPushNotifications()
                 .SupportsStateTransitionHistory()
                 .UseAgentRuntime<MockAgentRuntime>()
-                .UseDistributedCacheTaskRepository();
+                .UseDistributedCacheTaskRepository()
+                .UsePushNotificationSender<TestPushNotificationSender>();
         });
     }
 
@@ -71,4 +72,4 @@ public override void Configure(IApplicationBuilder app)
         });
     }
 
-}
+}

tests/a2a-net.IntegrationTests/Cases/A2AProtocolHttpClientTests.cs

@@ -239,7 +239,7 @@ public async System.Threading.Tasks.Task SetPushNotifications_Should_Work()
                 Id = sendRequest.Params.Id,
                 PushNotificationConfig = new()
                 {
-                    Url = new("http://fake-url.com")
+                    Url = new(WebServerFactory.Server.BaseAddress, "/callback")
                 }
             }
         };

tests/a2a-net.IntegrationTests/Services/TestPushNotificationSender.cs

@@ -0,0 +1,24 @@
+// Copyright � 2025-Present the a2a-net Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"),
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+namespace A2A.IntegrationTests.Services;
+
+public class TestPushNotificationSender
+    : IPushNotificationSender
+{
+
+    public System.Threading.Tasks.Task SendPushNotificationAsync(Uri url, object payload, CancellationToken cancellationToken = default) => System.Threading.Tasks.Task.CompletedTask;
+
+    public virtual Task<bool> VerifyPushNotificationUrlAsync(Uri url, CancellationToken cancellationToken = default) => System.Threading.Tasks.Task.FromResult(true);
+
+}