fix: Add network to container mac address test

Author: HofmeisterAn

src/Testcontainers/Clients/ContainerConfigurationConverter.cs

@@ -97,7 +97,8 @@ public ToNetworks(IContainerConfiguration configuration)
 
       public override IEnumerable<KeyValuePair<string, EndpointSettings>> Convert([CanBeNull] IEnumerable<INetwork> source)
       {
-        return source?.Select(network => new KeyValuePair<string, EndpointSettings>(network.Name, new EndpointSettings { Aliases = _configuration.NetworkAliases?.ToList() }));
+        var endpointSettings = new EndpointSettings { Aliases = _configuration.NetworkAliases?.ToList(), MacAddress = _configuration.MacAddress };
+        return source?.Select(network => new KeyValuePair<string, EndpointSettings>(network.Name, endpointSettings));
       }
     }
 

tests/Testcontainers.Tests/Unit/Containers/Unix/TestcontainersContainerTest.cs

@@ -90,9 +90,13 @@ public async Task MacAddress()
         // Given
         const string macAddress = "92:95:5e:30:fe:6d";
 
+        await using var network = new NetworkBuilder()
+          .Build();
+
         await using var container = new ContainerBuilder()
           .WithImage(CommonImages.Alpine)
           .WithEntrypoint(CommonCommands.SleepInfinity)
+          .WithNetwork(network)
           .WithMacAddress(macAddress)
           .Build();