From 75f7d43d9d7b84bd38ed28e1e438d715c2295f92 Mon Sep 17 00:00:00 2001
From: Endrik Tombak <enduslittlecomputer@gmail.com>
Date: Mon, 2 Apr 2018 11:56:35 +0300
Subject: [PATCH] Testcases for CarouselRoot

---
 .../Visual/TestCaseBeatmapCarousel.cs         | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/osu.Game.Tests/Visual/TestCaseBeatmapCarousel.cs b/osu.Game.Tests/Visual/TestCaseBeatmapCarousel.cs
index c68e548f44..4ae897bc1a 100644
--- a/osu.Game.Tests/Visual/TestCaseBeatmapCarousel.cs
+++ b/osu.Game.Tests/Visual/TestCaseBeatmapCarousel.cs
@@ -42,6 +42,7 @@ namespace osu.Game.Tests.Visual
 
 
         private readonly Stack<BeatmapSetInfo> selectedSets = new Stack<BeatmapSetInfo>();
+        private readonly HashSet<int> eagerSelectedIDs = new HashSet<int>();
 
         private BeatmapInfo currentSelection;
 
@@ -80,6 +81,7 @@ namespace osu.Game.Tests.Visual
             testEmptyTraversal();
             testHiding();
             testSelectingFilteredRuleset();
+            testCarouselRootIsRandom();
         }
 
         private void ensureRandomFetchSuccess() =>
@@ -151,6 +153,17 @@ namespace osu.Game.Tests.Visual
             AddAssert("Selection is visible", selectedBeatmapVisible);
         }
 
+        private void checkNonmatchingFilter()
+        {
+            AddStep("Toggel non-matching filter", () =>
+            {
+                carousel.Filter(new FilterCriteria { SearchText = "Dingo" }, false);
+                carousel.Filter(new FilterCriteria(), false);
+                eagerSelectedIDs.Add(carousel.SelectedBeatmapSet.ID);
+            }
+            );
+        }
+
         /// <summary>
         /// Test keyboard traversal
         /// </summary>
@@ -403,6 +416,23 @@ namespace osu.Game.Tests.Visual
             AddStep("remove single ruleset set", () => carousel.RemoveBeatmapSet(testSingle));
         }
 
+        private void testCarouselRootIsRandom()
+        {
+            List<BeatmapSetInfo> beatmapSets = new List<BeatmapSetInfo>();
+
+            for (int i = 1; i <= 50; i++)
+                beatmapSets.Add(createTestBeatmapSet(i));
+
+            AddStep("Load 50 Beatmaps", () => { carousel.BeatmapSets = beatmapSets; });
+            advanceSelection(direction: 1, diff: false);
+            checkNonmatchingFilter();
+            checkNonmatchingFilter();
+            checkNonmatchingFilter();
+            checkNonmatchingFilter();
+            checkNonmatchingFilter();
+            AddAssert("Selection was random", () => eagerSelectedIDs.Count > 1);
+        }
+
         private BeatmapSetInfo createTestBeatmapSet(int id)
         {
             return new BeatmapSetInfo