Migrate Redis tests to Testcontainers

.github/workflows/healthchecks_redis_ci.yml

@@ -30,11 +30,6 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    services:
-      redis:
-        image: redis:alpine
-        ports:
-          - 6379:6379
     steps:
       - uses: actions/checkout@v3
       - name: Setup .NET

Directory.Packages.props

@@ -102,6 +102,7 @@
     <PackageVersion Include="System.Text.Json" Version="8.0.5" />
     <PackageVersion Include="System.Text.RegularExpressions" Version="4.3.1" />
     <PackageVersion Include="System.Threading.Channels" Version="8.0.0" />
+    <PackageVersion Include="Testcontainers.Redis" Version="$(TestcontainersVersion)" />
     <PackageVersion Include="xunit" Version="2.9.2" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
   </ItemGroup>

build/versions.props

@@ -75,4 +75,8 @@
     <HealthCheckKeyVaultSecrets>9.0.0</HealthCheckKeyVaultSecrets>
   </PropertyGroup>
 
+  <PropertyGroup>
+    <TestcontainersVersion>4.1.0</TestcontainersVersion>
+  </PropertyGroup>
+
 </Project>

test/HealthChecks.Redis.Tests/Functional/RedisHealthCheckTests.cs

@@ -5,12 +5,12 @@
 
 namespace HealthChecks.Redis.Tests.Functional;
 
-public class redis_healthcheck_should
+public class redis_healthcheck_should(RedisContainerFixture redisContainerFixture) : IClassFixture<RedisContainerFixture>
 {
     [Fact]
     public async Task be_healthy_if_redis_is_available_with_connection_string()
     {
-        var connectionString = "localhost:6379,allowAdmin=true";
+        var connectionString = $"{redisContainerFixture.GetConnectionString()},allowAdmin=true";
 
         var webHostBuilder = new WebHostBuilder()
          .ConfigureServices(services =>
@@ -36,7 +36,7 @@ public async Task be_healthy_if_redis_is_available_with_connection_string()
     [Fact]
     public async Task be_healthy_if_multiple_redis_are_available_with_connection_string()
     {
-        var connectionString = "localhost:6379,allowAdmin=true";
+        var connectionString = $"{redisContainerFixture.GetConnectionString()},allowAdmin=true";
 
         var webHostBuilder = new WebHostBuilder()
             .ConfigureServices(services =>
@@ -63,8 +63,10 @@ public async Task be_healthy_if_multiple_redis_are_available_with_connection_str
     [Fact]
     public async Task be_healthy_if_redis_is_available_with_connection_multiplexer()
     {
+        var connectionString = $"{redisContainerFixture.GetConnectionString()},allowAdmin=true";
+
         var connectionMultiplexer = await ConnectionMultiplexer
-            .ConnectAsync("localhost:6379,allowAdmin=true");
+            .ConnectAsync(connectionString);
 
         var webHostBuilder = new WebHostBuilder()
          .ConfigureServices(services =>
@@ -90,8 +92,10 @@ public async Task be_healthy_if_redis_is_available_with_connection_multiplexer()
     [Fact]
     public async Task be_healthy_if_multiple_redis_are_available_with_connection_multiplexer()
     {
+        var connectionString = $"{redisContainerFixture.GetConnectionString()},allowAdmin=true";
+
         var connectionMultiplexer = await ConnectionMultiplexer
-            .ConnectAsync("localhost:6379,allowAdmin=true");
+            .ConnectAsync(connectionString);
 
         var webHostBuilder = new WebHostBuilder()
             .ConfigureServices(services =>

test/HealthChecks.Redis.Tests/HealthChecks.Redis.Tests.csproj

@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
+  <ItemGroup>
+    <PackageReference Include="Testcontainers.Redis" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\..\src\HealthChecks.Redis\HealthChecks.Redis.csproj" />
   </ItemGroup>

test/HealthChecks.Redis.Tests/RedisContainerFixture.cs

@@ -0,0 +1,35 @@
+using Testcontainers.Redis;
+
+namespace HealthChecks.Redis.Tests;
+
+public sealed class RedisContainerFixture : IAsyncLifetime
+{
+    public const string Registry = "docker.io";
+
+    public const string Image = "library/redis";
+
+    public const string Tag = "7.4";
+
+    public RedisContainer? Container { get; private set; }
+
+    public string GetConnectionString() => Container?.GetConnectionString() ??
+        throw new InvalidOperationException("The test container was not initialized.");
+
+    public async Task InitializeAsync() => Container = await CreateContainerAsync();
+
+    public async Task DisposeAsync()
+    {
+        if (Container is not null)
+            await Container.DisposeAsync();
+    }
+
+    public static async Task<RedisContainer> CreateContainerAsync()
+    {
+        var container = new RedisBuilder()
+            .WithImage($"{Registry}/{Image}:{Tag}")
+            .Build();
+        await container.StartAsync();
+
+        return container;
+    }
+}