Fix Grpc tests (#1401)

* Fix some Grpc tests

* await Task.Delay(1000);

* ports

test/WireMock.Net.Tests/Testcontainers/TestcontainersTests.Grpc.cs

@@ -3,6 +3,7 @@
 #if NET6_0_OR_GREATER
 using System;
 using System.IO;
+using System.Linq;
 using System.Net.Http;
 using System.Text;
 using System.Threading.Tasks;
@@ -12,6 +13,7 @@ using Greet;
 using Grpc.Net.Client;
 using WireMock.Constants;
 using WireMock.Net.Testcontainers;
+using WireMock.Util;
 using Xunit;
 
 namespace WireMock.Net.Tests.Testcontainers;
@@ -21,19 +23,22 @@ public partial class TestcontainersTests
     [Fact]
     public async Task WireMockContainer_Build_Grpc_TestPortsAndUrls1()
     {
-        // Act
+        // Arrange
         var adminUsername = $"username_{Guid.NewGuid()}";
         var adminPassword = $"password_{Guid.NewGuid()}";
+        var port = PortUtils.FindFreeTcpPort();
+
+        // Act
         var wireMockContainer = new WireMockContainerBuilder()
             .WithAdminUserNameAndPassword(adminUsername, adminPassword)
             .WithCommand("--UseHttp2")
-            .WithCommand("--Urls", "http://*:80 grpc://*:9090")
+            .WithCommand("--Urls", $"http://*:80 grpc://*:{port}")
-            .WithPortBinding(9090, true)
+            .WithPortBinding(port, true)
             .Build();
-
+        
         try
         {
-            await wireMockContainer.StartAsync().ConfigureAwait(false);
+            await wireMockContainer.StartAsync();
 
             // Assert
             using (new AssertionScope())
@@ -53,10 +58,10 @@ public partial class TestcontainersTests
                 var httpUrl = wireMockContainer.GetMappedPublicUrl(80);
                 httpUrl.Should().StartWith("http://");
 
-                var grpcPort = wireMockContainer.GetMappedPublicPort(9090);
+                var grpcPort = wireMockContainer.GetMappedPublicPort(port);
                 grpcPort.Should().BeGreaterThan(0);
 
-                var grpcUrl = wireMockContainer.GetMappedPublicUrl(9090);
+                var grpcUrl = wireMockContainer.GetMappedPublicUrl(port);
                 grpcUrl.Should().StartWith("http://");
 
                 var adminClient = wireMockContainer.CreateWireMockAdminClient();
@@ -74,19 +79,22 @@ public partial class TestcontainersTests
     [Fact]
     public async Task WireMockContainer_Build_Grpc_TestPortsAndUrls2()
     {
-        // Act
+        // Arrange
         var adminUsername = $"username_{Guid.NewGuid()}";
         var adminPassword = $"password_{Guid.NewGuid()}";
+        var ports = PortUtils.FindFreeTcpPorts(3);
+
+        // Act
         var wireMockContainer = new WireMockContainerBuilder()
             .WithAdminUserNameAndPassword(adminUsername, adminPassword)
-            .AddUrl("http://*:8080")
+            .AddUrl($"http://*:{ports[0]}")
-            .AddUrl("grpc://*:9090")
+            .AddUrl($"grpc://*:{ports[1]}")
-            .AddUrl("grpc://*:9091")
+            .AddUrl($"grpc://*:{ports[2]}")
             .Build();
 
         try
         {
-            await wireMockContainer.StartAsync().ConfigureAwait(false);
+            await wireMockContainer.StartAsync();
 
             // Assert
             using (new AssertionScope())
@@ -100,7 +108,7 @@ public partial class TestcontainersTests
                 var urls = wireMockContainer.GetPublicUrls();
                 urls.Should().HaveCount(4);
 
-                foreach (var internalPort in new[] { 80, 8080, 9090, 9091 })
+                foreach (var internalPort in new[] { ports[0], ports[1], ports[2], 80 })
                 {
                     var publicPort = wireMockContainer.GetMappedPublicPort(internalPort);
                     publicPort.Should().BeGreaterThan(0);
@@ -163,8 +171,9 @@ public partial class TestcontainersTests
 
     private static async Task<WireMockContainer> Given_WireMockContainerIsStartedForHttpAndGrpcAsync()
     {
+        var port = PortUtils.FindFreeTcpPort();
         var wireMockContainer = new WireMockContainerBuilder()
-            .AddUrl("grpc://*:9090")
+            .AddUrl($"grpc://*:{port}")
             .Build();
 
         await wireMockContainer.StartAsync();
@@ -174,8 +183,9 @@ public partial class TestcontainersTests
 
     private static async Task<WireMockContainer> Given_WireMockContainerWithProtoDefinitionAtServerLevelIsStartedForHttpAndGrpcAsync()
     {
+        var port = PortUtils.FindFreeTcpPort();
         var wireMockContainer = new WireMockContainerBuilder()
-            .AddUrl("grpc://*:9090")
+            .AddUrl($"grpc://*:{port}")
             .AddProtoDefinition("my-greeter", ReadFile("greet.proto"))
             .Build();
 
@@ -186,8 +196,9 @@ public partial class TestcontainersTests
 
     private static async Task<WireMockContainer> Given_WireMockContainerWithProtoDefinitionAtServerLevelWithWatchStaticMappingsIsStartedForHttpAndGrpcAsync()
     {
+        var port = PortUtils.FindFreeTcpPort();
         var wireMockContainer = new WireMockContainerBuilder()
-            .AddUrl("grpc://*:9090")
+            .AddUrl($"grpc://*:{port}")
             .AddProtoDefinition("my-greeter", ReadFile("greet.proto"))
             .WithMappings(Path.Combine(Directory.GetCurrentDirectory(), "__admin", "mappings"))
             .Build();
@@ -206,12 +217,12 @@ public partial class TestcontainersTests
         var result = await httpClient.PostAsync("/__admin/mappings", new StringContent(mappingsJson, Encoding.UTF8, WireMockConstants.ContentTypeJson));
         result.EnsureSuccessStatusCode();
 
-        await Task.Delay(1000);
+        await Task.Delay(5000);
     }
 
     private static async Task<HelloReply> When_GrpcClient_Calls_SayHelloAsync(WireMockContainer wireMockContainer)
     {
-        var address = wireMockContainer.GetPublicUrls()[9090];
+        var address = wireMockContainer.GetPublicUrls().First(x => x.Key != 80).Value;
         var channel = GrpcChannel.ForAddress(address);
 
         var client = new Greeter.GreeterClient(channel);