Expand number text box test scene to one holding all OsuTextBox's types

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

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+// 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.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics.UserInterface;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    public class TestSceneOsuTextBox : OsuTestScene
+    {
+        private readonly OsuNumberBox numberBox;
+
+        public TestSceneOsuTextBox()
+        {
+            Child = new Container
+            {
+                Masking = true,
+                CornerRadius = 10f,
+                AutoSizeAxes = Axes.Both,
+                Padding = new MarginPadding(15f),
+                Children = new Drawable[]
+                {
+                    new Box
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Colour = Color4.DarkSlateGray,
+                        Alpha = 0.75f,
+                    },
+                    new FillFlowContainer
+                    {
+                        AutoSizeAxes = Axes.Both,
+                        Direction = FillDirection.Vertical,
+                        Padding = new MarginPadding(50f),
+                        Spacing = new Vector2(0f, 50f),
+                        Children = new[]
+                        {
+                            new OsuTextBox
+                            {
+                                Width = 500f,
+                                PlaceholderText = "Normal textbox",
+                            },
+                            new OsuPasswordTextBox
+                            {
+                                Width = 500f,
+                                PlaceholderText = "Password textbox",
+                            },
+                            numberBox = new OsuNumberBox
+                            {
+                                Width = 500f,
+                                PlaceholderText = "Number textbox"
+                            }
+                        }
+                    }
+                }
+            };
+        }
+
+        [Test]
+        public void TestNumberBox()
+        {
+            clearTextbox(numberBox);
+            AddStep("enter numbers", () => numberBox.Text = "987654321");
+            expectedValue(numberBox, "987654321");
+
+            clearTextbox(numberBox);
+            AddStep("enter text + single number", () => numberBox.Text = "1 hello 2 world 3");
+            expectedValue(numberBox, "123");
+
+            clearTextbox(numberBox);
+        }
+
+        private void clearTextbox(OsuTextBox textBox) => AddStep("clear textbox", () => textBox.Text = null);
+        private void expectedValue(OsuTextBox textBox, string value) => AddAssert("expected textbox value", () => textBox.Text == value);
+    }
+}