Fix readyness-check for Testcontainers (#1408)

* Add XUnit Logging to TestcontainersTests

* .

src/WireMock.Net.Testcontainers/WireMockWaitStrategy.cs

@@ -0,0 +1,23 @@
+// Copyright © WireMock.Net
+
+using System;
+using System.Threading.Tasks;
+using DotNet.Testcontainers.Configurations;
+using DotNet.Testcontainers.Containers;
+
+namespace WireMock.Net.Testcontainers;
+
+internal class WireMockWaitStrategy : IWaitUntil
+{
+    public async Task<bool> UntilAsync(IContainer container)
+    {
+        if (container is not WireMockContainer wireMockContainer)
+        {
+            throw new InvalidOperationException("The passed container is not a WireMockContainer.");
+
+        }
+
+        await wireMockContainer.CallAdditionalActionsAfterReadyAsync();
+        return true;
+    }
+}