feat: Output logs in plugin tests

Author: max-lancaster

samples/Grpc/GrpcGreeterClient.Tests/GrpcGreeterClientTest.cs

@@ -15,10 +15,12 @@ namespace GrpcGreeterClient.Tests
 {
     public class GrpcGreeterClientTests : IDisposable
     {
+        private readonly ITestOutputHelper output;
         private readonly ISynchronousPluginPactBuilderV4 pact;
 
         public GrpcGreeterClientTests(ITestOutputHelper output)
         {
+            this.output = output;
             var config = new PactConfig
             {
                 PactDir = "../../../../pacts/",
@@ -58,6 +60,8 @@ public void ThrowsExceptionWhenNoGrpcClientRequestMade()
                 {
                     // No grpc call here results in failure.
                 }));
+
+            this.WriteLogs();
         }
 
         [Fact]
@@ -90,6 +94,16 @@ await this.pact.VerifyAsync(async ctx =>
                 // Assert
                 greeting.Should().Be("Hello foo");
             });
+
+            this.WriteLogs();
+        }
+
+        private void WriteLogs()
+        {
+            this.output.WriteLine(string.Empty);
+            this.output.WriteLine("Pact Interaction Logs");
+            this.output.WriteLine("-----------");
+            this.output.WriteLine(pact.FetchLogs());
         }
 
         public void Dispose() => this.pact?.Dispose();

src/PactNet.Abstractions/ISynchronousPluginPactBuilder.cs

@@ -5,4 +5,10 @@ namespace PactNet;
 public interface ISynchronousPluginPactBuilderV4 : IPactBuilder, IDisposable
 {
     ISynchronousPluginRequestBuilderV4 UponReceiving(string description);
+
+    /// <summary>
+    /// Fetch the interaction logs as a string.
+    /// </summary>
+    /// <returns>Logs</returns>
+    string FetchLogs();
 }

src/PactNet/SynchronousPluginPactBuilder.cs

@@ -1,4 +1,5 @@
 using PactNet.Drivers.Plugins;
+using PactNet.Interop;
 using PactNet.Models;
 
 namespace PactNet;
@@ -16,5 +17,11 @@ public ISynchronousPluginRequestBuilderV4 UponReceiving(string description)
         return new SynchronousPluginRequestBuilder(pact.NewSyncInteraction(description));
     }
 
+    /// <summary>
+    /// Fetch the interaction logs as a string.
+    /// </summary>
+    /// <returns>Logs</returns>
+    public string FetchLogs() => NativeInterop.FetchLogBuffer(null);
+
     public void Dispose() => pact?.Dispose();
 }