(#419) Updated fixtures to add an image, fixing deprecated constructor.

Author: adrianhall

tests/CommunityToolkit.Datasync.TestCommon/Fixtures/MsSqlDatabaseFixture.cs

@@ -10,12 +10,12 @@ namespace CommunityToolkit.Datasync.TestCommon.Fixtures;
 [ExcludeFromCodeCoverage]
 public class MsSqlDatabaseFixture : IAsyncLifetime
 {
+    private const string imageName = "mcr.microsoft.com/mssql/server:2025-CU2-ubuntu-22.04";
     private readonly MsSqlContainer _container;
 
     public MsSqlDatabaseFixture()
     {
-        this._container = new MsSqlBuilder()
-            .Build();
+        this._container = new MsSqlBuilder(imageName).Build();
     }
 
     /// <inheritdoc />

tests/CommunityToolkit.Datasync.TestCommon/Fixtures/PostgreSqlDatabaseFixture.cs

@@ -14,12 +14,12 @@ namespace CommunityToolkit.Datasync.TestCommon.Fixtures;
 [ExcludeFromCodeCoverage]
 public class PostgreSqlDatabaseFixture : IAsyncLifetime
 {
+    private const string imageName = "postgres:18-alpine";
     private readonly PostgreSqlContainer _container;
 
     public PostgreSqlDatabaseFixture()
     {
-        this._container = new PostgreSqlBuilder()
-            .WithImage("postgres:17-alpine")
+        this._container = new PostgreSqlBuilder(imageName)
             .WithCleanUp(true)
             .WithUsername("testuser")
             .WithPassword("testpassword")