Started Rework of the waitStrategy so it is more reliable.

src/Testcontainers.Pulsar/PulsarBuilder.cs

@@ -81,7 +81,26 @@ public PulsarBuilder WithFunctionsWorker(bool functionsWorkerEnabled = true)
     public override PulsarContainer Build()
     {
         Validate();
-        return new PulsarContainer(DockerResourceConfiguration);
+
+        var waitStrategy = Wait.ForUnixContainer();
+
+        waitStrategy = waitStrategy.UntilHttpRequestIsSucceeded(request
+            => request
+                .ForPath("/admin/v2/clusters")
+                .ForPort(PulsarWebServicePort)
+                .ForResponseMessageMatching(VerifyPulsarStatusAsync));
+
+        //To Do How do I access PulsarContainer.CreateAuthenticationTokenAsync so i can get the auth token?
+        // waitStrategy = waitStrategy.UntilHttpRequestIsSucceeded(request
+        //     => request
+        //         .ForPath("/admin/v2/clusters")
+        //         .ForPort(PulsarWebServicePort)
+        //         .ForResponseMessageMatching(VerifyPulsarStatusAsync)
+        //         .WithHeader("Authorization", ));
+
+        var pulsarBuilder = WithWaitStrategy(waitStrategy);
+
+        return new PulsarContainer(pulsarBuilder.DockerResourceConfiguration);
     }
 
     /// <inheritdoc />
@@ -94,10 +113,9 @@ protected override PulsarBuilder Init()
             .WithFunctionsWorker(false)
             .WithEntrypoint("/bin/sh", "-c")
             .WithCommand("while [ ! -f " + StartupScriptFilePath + " ]; do sleep 0.1; done; " + StartupScriptFilePath)
-            .WithWaitStrategy(Wait.ForUnixContainer().UntilCommandIsCompleted("bin/pulsar-admin", "clusters", "list"))
             .WithStartupCallback((container, ct) => container.CopyStartupScriptAsync(ct));
     }
-
+    
     /// <inheritdoc />
     protected override PulsarBuilder Clone(IResourceConfiguration<CreateContainerParameters> resourceConfiguration)
     {
@@ -115,4 +133,10 @@ protected override PulsarBuilder Merge(PulsarConfiguration oldValue, PulsarConfi
     {
         return new PulsarBuilder(new PulsarConfiguration(oldValue, newValue));
     }
+
+    private async Task<bool> VerifyPulsarStatusAsync(System.Net.Http.HttpResponseMessage response)
+    {
+        var readAsStringAsync = await response.Content.ReadAsStringAsync();
+        return readAsStringAsync == "[\"standalone\"]";
+    }
 }

src/Testcontainers.Pulsar/PulsarConfiguration.cs

@@ -60,12 +60,20 @@ public PulsarConfiguration(PulsarConfiguration oldValue, PulsarConfiguration new
     }
 
     /// <summary>
-    ///
+    /// Gets or sets the flag indicating whether authentication is enabled for the Pulsar container.
     /// </summary>
+    /// <remarks>
+    /// By default, authentication is disabled.
+    /// Setting this property to true enables authentication for the Pulsar container.
+    /// </remarks>
     public bool? AuthenticationEnabled { get; }
 
     /// <summary>
-    ///
+    /// Gets or sets a value indicating whether the functions worker is enabled.
     /// </summary>
+    /// <remarks>
+    /// The functions worker is responsible for executing functions within Pulsar.
+    /// By default, the functions worker is not enabled.
+    /// </remarks>
     public bool? FunctionsWorkerEnabled { get; }
 }