fix(Elasticsearch): Use HTTP wait strategy

docs/modules/elasticsearch.md

@@ -8,7 +8,14 @@ Add the following dependency to your project file:
 dotnet add package Testcontainers.Elasticsearch
 ```
 
-You can start an Elasticsearch container instance from any .NET application. This example uses xUnit.net's `IAsyncLifetime` interface to manage the lifecycle of the container. The container is started in the `InitializeAsync` method before the test method runs, ensuring that the environment is ready for testing. After the test completes, the container is removed in the `DisposeAsync` method.
+You can start an Elasticsearch container instance from any .NET application. Here, we create different container instances and pass them to the base test class. This allows us to test different configurations.
+
+=== "Create Container Instance"
+    ```csharp
+    --8<-- "tests/Testcontainers.Elasticsearch.Tests/ElasticsearchContainerTest.cs:CreateElasticsearchContainer"
+    ```
+
+This example uses xUnit.net's `IAsyncLifetime` interface to manage the lifecycle of the container. The container is started in the `InitializeAsync` method before the test method runs, ensuring that the environment is ready for testing. After the test completes, the container is removed in the `DisposeAsync` method.
 
 === "Usage Example"
     ```csharp

src/Testcontainers.Elasticsearch/ElasticsearchBuilder.cs

@@ -59,7 +59,11 @@ public ElasticsearchBuilder WithPassword(string password)
     public override ElasticsearchContainer Build()
     {
         Validate();
-        return new ElasticsearchContainer(DockerResourceConfiguration);
+
+        // By default, the base builder waits until the container is running. However, for Elasticsearch, a more advanced waiting strategy is necessary that requires access to the username and password.
+        // If the user does not provide a custom waiting strategy, append the default Elasticsearch waiting strategy.
+        var elasticsearchBuilder = DockerResourceConfiguration.WaitStrategies.Count() > 1 ? this : WithWaitStrategy(Wait.ForUnixContainer().AddCustomWaitStrategy(new WaitUntil(DockerResourceConfiguration)));
+        return new ElasticsearchContainer(elasticsearchBuilder.DockerResourceConfiguration);
     }
 
     /// <inheritdoc />
@@ -73,8 +77,7 @@ protected override ElasticsearchBuilder Init()
             .WithPassword(DefaultPassword)
             .WithEnvironment("discovery.type", "single-node")
             .WithEnvironment("ingest.geoip.downloader.enabled", "false")
-            .WithResourceMapping(DefaultMemoryVmOption, ElasticsearchDefaultMemoryVmOptionFilePath)
-            .WithWaitStrategy(Wait.ForUnixContainer().AddCustomWaitStrategy(new WaitUntil()));
+            .WithResourceMapping(DefaultMemoryVmOption, ElasticsearchDefaultMemoryVmOptionFilePath);
     }
 
     /// <inheritdoc />
@@ -121,15 +124,61 @@ private ElasticsearchBuilder WithUsername(string username)
     /// <inheritdoc cref="IWaitUntil" />
     private sealed class WaitUntil : IWaitUntil
     {
-        private static readonly IEnumerable<string> Pattern = new[] { "\"message\":\"started", "\"message\": \"started\"" };
+        private readonly bool _tlsEnabled;
 
-        /// <inheritdoc />
-        public async Task<bool> UntilAsync(IContainer container)
+        private readonly string _authToken;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WaitUntil" /> class.
+        /// </summary>
+        /// <param name="configuration">The container configuration.</param>
+        public WaitUntil(ElasticsearchConfiguration configuration)
+        {
+            var username = configuration.Username;
+            var password = configuration.Password;
+            _tlsEnabled = configuration.TlsEnabled;
+            _authToken = Convert.ToBase64String(Encoding.UTF8.GetBytes(string.Join(":", username, password)));
+        }
+
+        private static async Task<bool> IsNodeReadyAsync(HttpResponseMessage response)
         {
-            var (stdout, _) = await container.GetLogsAsync(since: container.StoppedTime, timestampsEnabled: false)
+            const StringComparison comparisonType = StringComparison.OrdinalIgnoreCase;
+
+            // https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-cluster-health.
+            var jsonString = await response.Content.ReadAsStringAsync()
                 .ConfigureAwait(false);
 
-            return Pattern.Any(stdout.Contains);
+            try
+            {
+                var status = JsonDocument.Parse(jsonString)
+                    .RootElement
+                    .GetProperty("status")
+                    .GetString();
+
+                return "green".Equals(status, comparisonType) || "yellow".Equals(status, comparisonType);
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        /// <inheritdoc cref="IWaitUntil.UntilAsync" />
+        public async Task<bool> UntilAsync(IContainer container)
+        {
+            using var httpMessageHandler = new HttpClientHandler();
+            httpMessageHandler.ServerCertificateCustomValidationCallback = (_, _, _, _) => true;
+
+            var httpWaitStrategy = new HttpWaitStrategy()
+                .UsingHttpMessageHandler(httpMessageHandler)
+                .UsingTls(_tlsEnabled)
+                .ForPort(ElasticsearchHttpsPort)
+                .ForPath("/_cluster/health")
+                .WithHeader("Authorization", "Basic " + _authToken)
+                .ForResponseMessageMatching(IsNodeReadyAsync);
+
+            return await httpWaitStrategy.UntilAsync(container)
+                .ConfigureAwait(false);
         }
     }
 }

src/Testcontainers.Elasticsearch/ElasticsearchConfiguration.cs

@@ -68,4 +68,27 @@ public ElasticsearchConfiguration(ElasticsearchConfiguration oldValue, Elasticse
     /// Gets the Elasticsearch password.
     /// </summary>
     public string Password { get; }
+
+    /// <summary>
+    /// Gets a value indicating whether TLS is enabled or not.
+    /// </summary>
+    public bool TlsEnabled
+    {
+        get
+        {
+            var hasSecurityEnabled = Environments
+                .TryGetValue("xpack.security.enabled", out var securityEnabled);
+
+            var hasHttpSslEnabled = Environments
+                .TryGetValue("xpack.security.http.ssl.enabled", out var httpSslEnabled);
+
+            var httpsDisabled =
+                hasSecurityEnabled &&
+                hasHttpSslEnabled &&
+                "false".Equals(securityEnabled, StringComparison.OrdinalIgnoreCase) &&
+                "false".Equals(httpSslEnabled, StringComparison.OrdinalIgnoreCase);
+
+            return !httpsDisabled;
+        }
+    }
 }

src/Testcontainers.Elasticsearch/ElasticsearchContainer.cs

@@ -28,20 +28,7 @@ public ElasticsearchContainer(ElasticsearchConfiguration configuration)
     /// <returns>The Elasticsearch connection string.</returns>
     public string GetConnectionString()
     {
-        var hasSecurityEnabled = _configuration.Environments
-            .TryGetValue("xpack.security.enabled", out var securityEnabled);
-
-        var hasHttpSslEnabled = _configuration.Environments
-            .TryGetValue("xpack.security.http.ssl.enabled", out var httpSslEnabled);
-
-        var httpsDisabled =
-            hasSecurityEnabled &&
-            hasHttpSslEnabled &&
-            "false".Equals(securityEnabled, StringComparison.OrdinalIgnoreCase) &&
-            "false".Equals(httpSslEnabled, StringComparison.OrdinalIgnoreCase);
-
-        var scheme = httpsDisabled ? Uri.UriSchemeHttp : Uri.UriSchemeHttps;
-
+        var scheme = _configuration.TlsEnabled ? Uri.UriSchemeHttps : Uri.UriSchemeHttp;
         var endpoint = new UriBuilder(scheme, Hostname, GetMappedPublicPort(ElasticsearchBuilder.ElasticsearchHttpsPort));
         endpoint.UserName = _configuration.Username;
         endpoint.Password = _configuration.Password;

src/Testcontainers.Elasticsearch/Usings.cs

@@ -1,7 +1,8 @@
 global using System;
-global using System.Collections.Generic;
 global using System.Linq;
+global using System.Net.Http;
 global using System.Text;
+global using System.Text.Json;
 global using System.Threading.Tasks;
 global using Docker.DotNet.Models;
 global using DotNet.Testcontainers;

tests/Testcontainers.Elasticsearch.Tests/ElasticsearchContainerTest.cs

@@ -1,19 +1,27 @@
 namespace Testcontainers.Elasticsearch;
 
-public sealed class ElasticsearchContainerTest : IAsyncLifetime
+public abstract class ElasticsearchContainerTest : IAsyncLifetime
 {
-    // # --8<-- [start:UseElasticsearchContainer]
-    private readonly ElasticsearchContainer _elasticsearchContainer = new ElasticsearchBuilder().Build();
+    private readonly ElasticsearchContainer _elasticsearchContainer;
 
+    private ElasticsearchContainerTest(ElasticsearchContainer elasticsearchContainer)
+    {
+        _elasticsearchContainer = elasticsearchContainer;
+    }
+
+    // # --8<-- [start:UseElasticsearchContainer]
     public async ValueTask InitializeAsync()
     {
         await _elasticsearchContainer.StartAsync()
             .ConfigureAwait(false);
     }
 
-    public ValueTask DisposeAsync()
+    public async ValueTask DisposeAsync()
     {
-        return _elasticsearchContainer.DisposeAsync();
+        await DisposeAsyncCore()
+            .ConfigureAwait(false);
+
+        GC.SuppressFinalize(this);
     }
 
     [Fact]
@@ -33,4 +41,29 @@ public void PingReturnsValidResponse()
         Assert.True(response.IsValidResponse);
     }
     // # --8<-- [end:UseElasticsearchContainer]
+
+    protected virtual ValueTask DisposeAsyncCore()
+    {
+        return _elasticsearchContainer.DisposeAsync();
+    }
+
+    // # --8<-- [start:CreateElasticsearchContainer]
+    [UsedImplicitly]
+    public sealed class ElasticsearchDefaultConfiguration : ElasticsearchContainerTest
+    {
+        public ElasticsearchDefaultConfiguration()
+            : base(new ElasticsearchBuilder().Build())
+        {
+        }
+    }
+
+    [UsedImplicitly]
+    public sealed class ElasticsearchAuthConfiguration : ElasticsearchContainerTest
+    {
+        public ElasticsearchAuthConfiguration()
+            : base(new ElasticsearchBuilder().WithPassword("some-password").Build())
+        {
+        }
+    }
+    // # --8<-- [end:CreateElasticsearchContainer]
 }

tests/Testcontainers.Elasticsearch.Tests/Usings.cs

@@ -3,4 +3,5 @@
 global using DotNet.Testcontainers.Commons;
 global using Elastic.Clients.Elasticsearch;
 global using Elastic.Transport;
+global using JetBrains.Annotations;
 global using Xunit;

tests/Testcontainers.Grafana.Tests/GrafanaContainerTest.cs

@@ -35,11 +35,11 @@ await DisposeAsyncCore()
     public async Task GetCurrentOrganizationReturnsHttpStatusCodeOk()
     {
         // Given
-        var basicAuth = Convert.ToBase64String(Encoding.UTF8.GetBytes(string.Join(":", _username, _password)));
+        var authToken = Convert.ToBase64String(Encoding.UTF8.GetBytes(string.Join(":", _username, _password)));
 
         using var httpClient = new HttpClient();
         httpClient.BaseAddress = new Uri(_grafanaContainer.GetBaseAddress());
-        httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", basicAuth);
+        httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", authToken);
 
         // When
         using var httpResponse = await httpClient.GetAsync("api/org", TestContext.Current.CancellationToken)