Merge branch 'master' into async-deadlock-safety

osu.Game.Tests/Visual/UserInterface/TestScenePageSelector.cs

@@ -0,0 +1,79 @@
+// 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.Linq;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Testing;
+using osu.Game.Graphics.UserInterface.PageSelector;
+using osu.Game.Overlays;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    public class TestScenePageSelector : OsuTestScene
+    {
+        [Cached]
+        private OverlayColourProvider provider { get; } = new OverlayColourProvider(OverlayColourScheme.Green);
+
+        private readonly PageSelector pageSelector;
+
+        public TestScenePageSelector()
+        {
+            AddRange(new Drawable[]
+            {
+                pageSelector = new PageSelector
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
+            });
+        }
+
+        [Test]
+        public void TestOmittedPages()
+        {
+            setAvailablePages(100);
+
+            selectPageIndex(0);
+            checkVisiblePageNumbers(new[] { 1, 2, 3, 100 });
+
+            selectPageIndex(6);
+            checkVisiblePageNumbers(new[] { 1, 5, 6, 7, 8, 9, 100 });
+
+            selectPageIndex(49);
+            checkVisiblePageNumbers(new[] { 1, 48, 49, 50, 51, 52, 100 });
+
+            selectPageIndex(99);
+            checkVisiblePageNumbers(new[] { 1, 98, 99, 100 });
+        }
+
+        [Test]
+        public void TestResetCurrentPage()
+        {
+            setAvailablePages(10);
+            selectPageIndex(6);
+            setAvailablePages(11);
+            AddAssert("Page 1 is current", () => pageSelector.CurrentPage.Value == 0);
+        }
+
+        [Test]
+        public void TestOutOfBoundsSelection()
+        {
+            setAvailablePages(10);
+            selectPageIndex(11);
+            AddAssert("Page 10 is current", () => pageSelector.CurrentPage.Value == pageSelector.AvailablePages.Value - 1);
+
+            selectPageIndex(-1);
+            AddAssert("Page 1 is current", () => pageSelector.CurrentPage.Value == 0);
+        }
+
+        private void checkVisiblePageNumbers(int[] expected) => AddAssert($"Sequence is {string.Join(',', expected.Select(i => i.ToString()))}", () => pageSelector.ChildrenOfType<PageSelectorPageButton>().Select(p => p.PageNumber).SequenceEqual(expected));
+
+        private void selectPageIndex(int pageIndex) =>
+            AddStep($"Select page {pageIndex}", () => pageSelector.CurrentPage.Value = pageIndex);
+
+        private void setAvailablePages(int availablePages) =>
+            AddStep($"Set available pages to {availablePages}", () => pageSelector.AvailablePages.Value = availablePages);
+    }
+}