Add audio in video check and tests

osu.Game.Tests/Editing/Checks/CheckAudioInVideoTest.cs

@@ -0,0 +1,107 @@
+// 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 System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using ManagedBass;
+using Moq;
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Storyboards;
+using osu.Game.Tests.Beatmaps;
+using osu.Game.Tests.Resources;
+using osuTK.Audio;
+using FileInfo = osu.Game.IO.FileInfo;
+
+namespace osu.Game.Tests.Editing.Checks
+{
+    [TestFixture]
+    public class CheckAudioInVideoTest
+    {
+        private CheckAudioInVideo check;
+        private IBeatmap beatmap;
+
+        [SetUp]
+        public void Setup()
+        {
+            check = new CheckAudioInVideo();
+            beatmap = new Beatmap<HitObject>
+            {
+                BeatmapInfo = new BeatmapInfo
+                {
+                    BeatmapSet = new BeatmapSetInfo
+                    {
+                        Files = new List<BeatmapSetFileInfo>(new[]
+                        {
+                            new BeatmapSetFileInfo
+                            {
+                                Filename = "abc123.mp4",
+                                FileInfo = new FileInfo { Hash = "abcdef" }
+                            }
+                        })
+                    }
+                }
+            };
+
+            // 0 = No output device. This still allows decoding.
+            if (!Bass.Init(0) && Bass.LastError != Errors.Already)
+                throw new AudioException("Could not initialize Bass.");
+        }
+
+        [Test]
+        public void TestRegularVideoFile()
+        {
+            Assert.IsEmpty(check.Run(getContext("Videos/test-video.mp4")));
+        }
+
+        [Test]
+        public void TestVideoFileWithAudio()
+        {
+            var issues = check.Run(getContext("Videos/test-video-with-audio.mp4")).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAudioInVideo.IssueTemplateHasAudioTrack);
+        }
+
+        [Test]
+        public void TestVideoFileWithTrackButNoAudio()
+        {
+            var issues = check.Run(getContext("Videos/test-video-with-track-but-no-audio.mp4")).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAudioInVideo.IssueTemplateHasAudioTrack);
+        }
+
+        [Test]
+        public void TestMissingFile()
+        {
+            beatmap.BeatmapInfo.BeatmapSet.Files.Clear();
+
+            var issues = check.Run(getContext("Videos/missing.mp4", allowMissing: true)).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAudioInVideo.IssueTemplateMissingFile);
+        }
+
+        private BeatmapVerifierContext getContext(string resourceName, bool allowMissing = false)
+        {
+            Stream resourceStream = string.IsNullOrEmpty(resourceName) ? null : TestResources.OpenResource(resourceName);
+            if (!allowMissing && resourceStream == null)
+                throw new FileNotFoundException($"The requested test resource \"{resourceName}\" does not exist.");
+
+            var storyboard = new Storyboard();
+            var layer = storyboard.GetLayer("Video");
+            layer.Add(new StoryboardVideo("abc123.mp4", 0));
+
+            var mockWorkingBeatmap = new Mock<TestWorkingBeatmap>(beatmap, null, null);
+            mockWorkingBeatmap.Setup(w => w.GetStream(It.IsAny<string>())).Returns(resourceStream);
+            mockWorkingBeatmap.As<IWorkingBeatmap>().SetupGet(w => w.Storyboard).Returns(storyboard);
+
+            return new BeatmapVerifierContext(beatmap, mockWorkingBeatmap.Object);
+        }
+    }
+}