Add test scene for "Freeze Frame" mod

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModFreezeFrame.cs

@@ -0,0 +1,22 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using NUnit.Framework;
+using osu.Game.Rulesets.Osu.Mods;
+
+namespace osu.Game.Rulesets.Osu.Tests.Mods
+{
+    public class TestSceneOsuModFreezeFrame : OsuModTestScene
+    {
+        [Test]
+        public void TestFreezeFrame()
+        {
+            CreateModTest(new ModTestData
+            {
+                Mod = new OsuModFreezeFrame(),
+                PassCondition = () => true,
+                Autoplay = false,
+            });
+        }
+    }
+}