Make tests faster (#8737)

* Test changes

* Make finding the test tile a little smarter

Content.IntegrationTests/Tests/SaveLoadMapTest.cs

@@ -11,24 +11,21 @@ using Robust.Shared.Utility;
 namespace Content.IntegrationTests.Tests
 {
     [TestFixture]
-    sealed class SaveLoadMapTest : ContentIntegrationTest
+    sealed class SaveLoadMapTest
     {
         [Test]
         public async Task SaveLoadMultiGridMap()
         {
             const string mapPath = @"/Maps/Test/TestMap.yml";
 
-            var server = StartServer(new ServerContentIntegrationOption
-            {
-                FailureLogLevel = LogLevel.Error
-            });
-            await server.WaitIdleAsync();
+            await using var pairTracker = await PoolManager.GetServerClient(new PoolSettings{NoClient = true});
+            var server = pairTracker.Pair.Server;
             var mapLoader = server.ResolveDependency<IMapLoader>();
             var mapManager = server.ResolveDependency<IMapManager>();
             var sEntities = server.ResolveDependency<IEntityManager>();
             var resManager = server.ResolveDependency<IResourceManager>();
 
-            server.Post(() =>
+            await server.WaitPost(() =>
             {
                 var dir = new ResourcePath(mapPath).Directory;
                 resManager.UserData.CreateDir(dir);
@@ -54,7 +51,7 @@ namespace Content.IntegrationTests.Tests
             });
             await server.WaitIdleAsync();
 
-            server.Post(() =>
+            await server.WaitPost(() =>
             {
                 mapLoader.LoadMap(new MapId(10), mapPath);
             });
@@ -77,7 +74,7 @@ namespace Content.IntegrationTests.Tests
                     Assert.That(mapGrid.GetTileRef(new Vector2i(0, 0)).Tile, Is.EqualTo(new Tile(2, (TileRenderFlag)1, 254)));
                 }
             });
-
+            await pairTracker.CleanReturnAsync();
         }
     }
 }