Add a polling component model

osu.Game.Tests/Visual/TestCasePollingComponent.cs

@@ -0,0 +1,98 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.Threading.Tasks;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Online;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Tests.Visual
+{
+    public class TestCasePollingComponent : OsuTestCase
+    {
+        private Container pollBox;
+        private TestPoller poller;
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Children = new Drawable[]
+            {
+                poller = new TestPoller(),
+                pollBox = new Container
+                {
+                    Alpha = 0,
+                    RelativeSizeAxes = Axes.Both,
+                    Children = new Drawable[]
+                    {
+                        new Box
+                        {
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                            Scale = new Vector2(0.4f),
+                            Colour = Color4.LimeGreen,
+                            RelativeSizeAxes = Axes.Both,
+                        },
+                        new OsuSpriteText
+                        {
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                            Text = "Poll!",
+                        }
+                    }
+                }
+            };
+
+            int count = 0;
+
+            poller.OnPoll += () =>
+            {
+                pollBox.FadeOutFromOne(500);
+                count++;
+            };
+
+            AddStep("set poll to 1 second", () => poller.TimeBetweenPolls = TimePerAction);
+
+            void checkCount(int checkValue) => AddAssert($"count is {checkValue}", () => count == checkValue);
+
+            checkCount(1);
+            checkCount(2);
+            checkCount(3);
+
+            AddStep("set poll to 5 second", () => poller.TimeBetweenPolls = TimePerAction * 5);
+
+            checkCount(4);
+            checkCount(4);
+            checkCount(4);
+            checkCount(4);
+
+            checkCount(5);
+            checkCount(5);
+            checkCount(5);
+
+            AddStep("set poll to 5 second", () => poller.TimeBetweenPolls = TimePerAction);
+
+            AddAssert("count is 6", () => count == 6);
+
+        }
+
+        protected override double TimePerAction => 500;
+
+        public class TestPoller : PollingComponent
+        {
+            public event Action OnPoll;
+
+            protected override Task Poll()
+            {
+                OnPoll?.Invoke();
+                return base.Poll();
+            }
+        }
+    }
+}