Remove ParticleJet

osu.Game.Tests/Visual/Gameplay/TestSceneParticleSpewer.cs

@@ -0,0 +1,94 @@
+// 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;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Textures;
+using osu.Framework.Testing;
+using osu.Framework.Utils;
+using osu.Game.Graphics.Particles;
+using osu.Game.Skinning;
+using osuTK;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    [TestFixture]
+    public class TestSceneParticleSpewer : OsuTestScene
+    {
+        private TestParticleSpewer spewer;
+
+        [Resolved]
+        private SkinManager skinManager { get; set; }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Child = spewer = createSpewer();
+
+            AddToggleStep("toggle spawning", value => spewer.Active.Value = value);
+            AddSliderStep("particle gravity", 0f, 250f, 0f, value => spewer.Gravity = value);
+            AddSliderStep("particle velocity", 0f, 500f, 250f, value => spewer.MaxVelocity = value);
+        }
+
+        [SetUpSteps]
+        public void SetUpSteps()
+        {
+            AddStep("create jet", () => Child = spewer = createSpewer());
+        }
+
+        [Test]
+        public void TestPresence()
+        {
+            AddStep("start jet", () => spewer.Active.Value = true);
+            AddAssert("is present", () => spewer.IsPresent);
+
+            AddWaitStep("wait for some particles", 3);
+            AddStep("stop jet", () => spewer.Active.Value = false);
+
+            AddWaitStep("wait for clean screen", 8);
+            AddAssert("is not present", () => !spewer.IsPresent);
+        }
+
+        private TestParticleSpewer createSpewer()
+        {
+            return new TestParticleSpewer(skinManager.DefaultLegacySkin.GetTexture("star2"))
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+            };
+        }
+
+        private class TestParticleSpewer : ParticleSpewer
+        {
+            private const int lifetime = 1500;
+            private const int rate = 250;
+
+            public float Gravity = 0;
+            public float MaxVelocity = 250;
+
+            protected override float ParticleGravity => Gravity;
+
+            public TestParticleSpewer(Texture texture)
+                : base(texture, rate, lifetime)
+            {
+            }
+
+            protected override FallingParticle SpawnParticle()
+            {
+                var p = base.SpawnParticle();
+                p.Velocity = new Vector2(
+                    RNG.NextSingle(-MaxVelocity, MaxVelocity),
+                    RNG.NextSingle(-MaxVelocity, MaxVelocity)
+                );
+                p.Duration = RNG.NextSingle(lifetime);
+                p.StartAngle = RNG.NextSingle(MathF.PI * 2);
+                p.EndAngle = RNG.NextSingle(MathF.PI * 2);
+                p.EndScale = RNG.NextSingle(0.5f, 1.5f);
+
+                return p;
+            }
+        }
+    }
+}