Add ParticleJet

osu.Game.Tests/Visual/Gameplay/TestSceneParticleJet.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.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Testing;
+using osu.Game.Graphics.Particles;
+using osu.Game.Skinning;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    [TestFixture]
+    public class TestSceneParticleJet : OsuTestScene
+    {
+        private ParticleJet jet;
+
+        [Resolved]
+        private SkinManager skinManager { get; set; }
+
+        public TestSceneParticleJet()
+        {
+            AddStep("create", () =>
+            {
+                Child = jet = createJet();
+            });
+
+            AddToggleStep("toggle spawning", value => jet.Active = value);
+        }
+
+        [SetUpSteps]
+        public void SetUpSteps()
+        {
+            AddStep("create jet", () => Child = jet = createJet());
+        }
+
+        [Test]
+        public void TestPresence()
+        {
+            AddStep("start jet", () => jet.Active = true);
+            AddAssert("is present", () => jet.IsPresent);
+
+            AddWaitStep("wait for some particles", 3);
+            AddStep("stop jet", () => jet.Active = false);
+
+            AddWaitStep("wait for clean screen", 5);
+            AddAssert("is not present", () => !jet.IsPresent);
+        }
+
+        private ParticleJet createJet()
+        {
+            return new ParticleJet(skinManager.DefaultLegacySkin.GetTexture("star2"), 180)
+            {
+                Anchor = Anchor.BottomCentre,
+                Origin = Anchor.BottomCentre,
+                RelativePositionAxes = Axes.Y,
+                Y = -0.1f,
+            };
+        }
+    }
+}