fix: Impl GetHashCode(), add actual image version as plain string

Author: HofmeisterAn

src/Testcontainers.Xunit/XunitLoggerProvider.cs

@@ -1,4 +1,4 @@
-namespace Testcontainers.Xunit;
+namespace Testcontainers.Xunit;
 
 internal sealed class XunitLoggerProvider : ILoggerProvider
 {
@@ -47,6 +47,11 @@ public void WriteLine(string format, params object[] args)
         {
             _messageSink.OnMessage(new DiagnosticMessage(format, args));
         }
+
+        public override int GetHashCode()
+        {
+            return _messageSink.GetHashCode();
+        }
     }
 
     private sealed class XunitLogger : ILogger
@@ -76,10 +81,15 @@ public bool IsEnabled(LogLevel logLevel)
 
         public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func<TState, Exception, string> formatter)
         {
-            var message = exception == null ? formatter.Invoke(state, null) : $"{formatter.Invoke(state, exception)}\n{exception}";
+            var message = exception == null ? formatter.Invoke(state, null) : string.Join(Environment.NewLine, formatter.Invoke(state, exception), exception);
             _testOutputHelper.WriteLine("[{0} {1:hh\\:mm\\:ss\\.ff}] {2}", _categoryName, _stopwatch.Elapsed, message);
         }
 
+        public override int GetHashCode()
+        {
+            return _testOutputHelper.GetHashCode();
+        }
+
         private sealed class Disposable : IDisposable
         {
             private Disposable()

tests/Testcontainers.Xunit.Tests/PostgreSqlContainer.cs

@@ -7,7 +7,7 @@ public sealed partial class PostgreSqlContainerTest(ITestOutputHelper testOutput
     protected override PostgreSqlBuilder Configure(PostgreSqlBuilder builder)
     {
         return builder
-            .WithImage(PostgreSqlBuilder.PostgreSqlImage)
+            .WithImage("postgres:15.1")
             .WithResourceMapping("Chinook_PostgreSql_AutoIncrementPKs.sql", "/docker-entrypoint-initdb.d/");
     }
 }
@@ -35,6 +35,12 @@ public override string ConnectionString
 
 public sealed partial class PostgreSqlContainerTest
 {
+    [Fact]
+    public void ImageShouldMatchDefaultModuleImage()
+    {
+        Assert.Equal(PostgreSqlBuilder.PostgreSqlImage, Container.Image.FullName);
+    }
+
     // # --8<-- [start:RunTests]
     [Fact]
     public async Task Test1()

tests/Testcontainers.Xunit.Tests/RedisContainerTest`1.cs

@@ -7,13 +7,19 @@ public sealed partial class RedisContainerTest(ITestOutputHelper testOutputHelpe
     protected override RedisBuilder Configure(RedisBuilder builder)
     {
         // 👇 Configure your container instance here.
-        return builder.WithImage(RedisBuilder.RedisImage);
+        return builder.WithImage("redis:7.0");
     }
 }
 // # --8<-- [end:ConfigureRedisContainer]
 
 public sealed partial class RedisContainerTest : ITestCaseOrderer
 {
+    [Fact]
+    public void ImageShouldMatchDefaultModuleImage()
+    {
+        Assert.Equal(RedisBuilder.RedisImage, Container.Image.FullName);
+    }
+
     // # --8<-- [start:RunTests]
     [Fact]
     public async Task Test1()

tests/Testcontainers.Xunit.Tests/RedisContainerTest`2.cs

@@ -7,7 +7,7 @@ public sealed class RedisContainerFixture(IMessageSink messageSink)
 {
     protected override RedisBuilder Configure(RedisBuilder builder)
     {
-        return builder.WithImage(RedisBuilder.RedisImage);
+        return builder.WithImage("redis:7.0");
     }
 }
 // # --8<-- [end:ConfigureRedisContainer]
@@ -19,6 +19,12 @@ public sealed partial class RedisContainerTest(RedisContainerFixture fixture)
 
 public sealed partial class RedisContainerTest : ITestCaseOrderer
 {
+    [Fact]
+    public void ImageShouldMatchDefaultModuleImage()
+    {
+        Assert.Equal(RedisBuilder.RedisImage, fixture.Container.Image.FullName);
+    }
+
     [Fact]
     public async Task Test1()
     {