From 909f8d1d9800eb7ffd820463865b38ea4e6f5264 Mon Sep 17 00:00:00 2001
From: Jamie Taylor <me@nekodex.net>
Date: Wed, 29 Sep 2021 19:20:05 +0900
Subject: [PATCH] Add visual tests for `Filter`

---
 osu.Game.Tests/Audio/TestSceneFilter.cs | 95 +++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 osu.Game.Tests/Audio/TestSceneFilter.cs

diff --git a/osu.Game.Tests/Audio/TestSceneFilter.cs b/osu.Game.Tests/Audio/TestSceneFilter.cs
new file mode 100644
index 0000000000..fd4fe530eb
--- /dev/null
+++ b/osu.Game.Tests/Audio/TestSceneFilter.cs
@@ -0,0 +1,95 @@
+// 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 ManagedBass.Fx;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Audio;
+using osu.Framework.Graphics;
+using osu.Game.Audio.Effects;
+using osu.Game.Beatmaps;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Tests.Audio
+{
+    public class TestSceneFilter : OsuTestScene
+    {
+        [Resolved]
+        private AudioManager audio { get; set; }
+
+        private WorkingBeatmap testBeatmap;
+        private Filter lowPassFilter;
+        private Filter highPassFilter;
+        private Filter bandPassFilter;
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            testBeatmap = new WaveformTestBeatmap(audio);
+            AddRange(new Drawable[]
+            {
+                lowPassFilter = new Filter(audio.TrackMixer)
+                {
+                    FilterType = BQFType.LowPass,
+                    SweepCutoffStart = 2000,
+                    SweepCutoffEnd = 150,
+                    SweepDuration = 1000
+                },
+                highPassFilter = new Filter(audio.TrackMixer)
+                {
+                    FilterType = BQFType.HighPass,
+                    SweepCutoffStart = 150,
+                    SweepCutoffEnd = 2000,
+                    SweepDuration = 1000
+                },
+                bandPassFilter = new Filter(audio.TrackMixer)
+                {
+                    FilterType = BQFType.BandPass,
+                    SweepCutoffStart = 150,
+                    SweepCutoffEnd = 20000,
+                    SweepDuration = 1000
+                },
+            });
+        }
+
+        [Test]
+        public void TestLowPass()
+        {
+            testFilter(lowPassFilter);
+        }
+
+        [Test]
+        public void TestHighPass()
+        {
+            testFilter(highPassFilter);
+        }
+
+        [Test]
+        public void TestBandPass()
+        {
+            testFilter(bandPassFilter);
+        }
+
+        private void testFilter(Filter filter)
+        {
+            AddStep("Prepare Track", () =>
+            {
+                testBeatmap = new WaveformTestBeatmap(audio);
+                testBeatmap.LoadTrack();
+            });
+            AddStep("Play Track", () =>
+            {
+                testBeatmap.Track.Start();
+            });
+            AddWaitStep("Let track play", 10);
+            AddStep("Enable Filter", filter.Enable);
+            AddWaitStep("Let track play", 10);
+            AddStep("Disable Filter", filter.Disable);
+            AddWaitStep("Let track play", 10);
+            AddStep("Stop Track", () =>
+            {
+                testBeatmap.Track.Stop();
+            });
+        }
+    }
+}