Add test scene for previewing Torus alternates

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

@@ -0,0 +1,77 @@
+// 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.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    public class TestSceneOsuFont : OsuTestScene
+    {
+        private OsuSpriteText spriteText;
+
+        private readonly BindableBool useAlternates = new BindableBool();
+        private readonly Bindable<FontWeight> weight = new Bindable<FontWeight>(FontWeight.Regular);
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Child = spriteText = new OsuSpriteText
+            {
+                Origin = Anchor.Centre,
+                Anchor = Anchor.Centre,
+                RelativeSizeAxes = Axes.X,
+                AllowMultiline = true,
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            useAlternates.BindValueChanged(_ => updateFont());
+            weight.BindValueChanged(_ => updateFont(), true);
+        }
+
+        private void updateFont()
+        {
+            FontUsage usage = useAlternates.Value ? OsuFont.TorusAlternate : OsuFont.Torus;
+            spriteText.Font = usage.With(size: 40, weight: weight.Value);
+        }
+
+        [Test]
+        public void TestTorusAlternates()
+        {
+            AddStep("set all ASCII letters", () => spriteText.Text = @"ABCDEFGHIJKLMNOPQRSTUVWXYZ
+abcdefghijklmnopqrstuvwxyz");
+            AddStep("set all alternates", () => spriteText.Text = @"A Á Ă Â Ä À Ā Ą Å Ã
+Æ B D Ð Ď Đ E É Ě Ê
+Ë Ė È Ē Ę F G Ğ Ģ Ġ
+H I Í Î Ï İ Ì Ī Į K
+Ķ O Œ P Þ Q R Ŕ Ř Ŗ
+T Ŧ Ť Ţ Ț V W Ẃ Ŵ Ẅ
+Ẁ X Y Ý Ŷ Ÿ Ỳ a á ă
+â ä à ā ą å ã æ b d
+ď đ e é ě ê ë ė è ē
+ę f g ğ ģ ġ k ķ m n
+ń ň ņ ŋ ñ o œ p þ q
+t ŧ ť ţ ț u ú û ü ù
+ű ū ų ů w ẃ ŵ ẅ ẁ x
+y ý ŷ ÿ ỳ");
+
+            AddToggleStep("toggle alternates", alternates => useAlternates.Value = alternates);
+
+            addSetWeightStep(FontWeight.Light);
+            addSetWeightStep(FontWeight.Regular);
+            addSetWeightStep(FontWeight.SemiBold);
+            addSetWeightStep(FontWeight.Bold);
+
+            void addSetWeightStep(FontWeight newWeight) => AddStep($"set weight {newWeight}", () => weight.Value = newWeight);
+        }
+    }
+}