add fixed game time

It is a must to provide a fixed game time in MockWindowSystem.RunOneLoop() in order to make tests more deterministic.
MarcosCobena · Jul 18, 2023 · f7cdc6f · f7cdc6f
1 parent 30881e8
commit f7cdc6f
Show file tree

Hide file tree

Showing 3 changed files with 28 additions and 26 deletions.
diff --git a/src/Evergine.Mocks/MockWindowsSystem.cs b/src/Evergine.Mocks/MockWindowsSystem.cs
@@ -2,7 +2,6 @@
 using Evergine.Framework;
 using Evergine.Framework.Graphics;
 using Evergine.Framework.Services;
-using System.Diagnostics;
 
 namespace Evergine.Mocks
 {
@@ -12,6 +11,8 @@ public class MockWindowsSystem : WindowsSystem
 
         private MockWindow? mockWindow;
 
+        private static TimeSpan? nextRenderCallbackElapsedTime;
+
         private MockWindowsSystem()
         {
         }
@@ -37,14 +38,9 @@ public override Window CreateWindow(string title, uint width, uint height, bool
             return this.mockWindow;
         }
 
-        protected override void CreateLoopThread(Action loadAction, Action renderCallback)
-        {
-            loadAction();
-            this.renderCallback = renderCallback;
-        }
-
-        public void RunOneLoop()
+        public void RunOneLoop(TimeSpan elapsedTime)
         {
+            nextRenderCallbackElapsedTime = elapsedTime;
             this.renderCallback?.Invoke();
         }
 
@@ -71,7 +67,6 @@ public static MockWindowsSystem Create(Application application, Scene scene)
             var firstDisplay = new Display(window, swapChain);
             graphicsPresenter.AddDisplay("DefaultDisplay", firstDisplay);
             application.Container.RegisterInstance(graphicsContext);
-            var clockTimer = Stopwatch.StartNew();
             instance.Run(
                 () =>
                 {
@@ -82,14 +77,17 @@ public static MockWindowsSystem Create(Application application, Scene scene)
                 },
                 () =>
                 {
-                    var gameTime = clockTimer.Elapsed;
-                    clockTimer.Restart();
-
-                    application.UpdateFrame(gameTime);
-                    application.DrawFrame(gameTime);
+                    application.UpdateFrame(nextRenderCallbackElapsedTime!.Value);
+                    application.DrawFrame(nextRenderCallbackElapsedTime.Value);
                 });
 
             return instance;
         }
+
+        protected override void CreateLoopThread(Action loadAction, Action renderCallback)
+        {
+            loadAction();
+            this.renderCallback = renderCallback;
+        }
     }
 }
diff --git a/src/Sample/Sample.Tests/MyBehaviorShould.cs b/src/Sample/Sample.Tests/MyBehaviorShould.cs
@@ -3,6 +3,7 @@
 using Evergine.Framework;
 using Evergine.Framework.Graphics;
 using Evergine.Mocks;
+using System;
 using Xunit;
 
 namespace Sample.Tests
@@ -13,6 +14,8 @@ public class MyBehaviorShould
 
         private readonly MockWindowsSystem windowsSystem;
 
+        private readonly TimeSpan fixedElapsedTime = TimeSpan.FromSeconds(1d / 60);
+
         public MyBehaviorShould()
         {
             this.component = new MyBehavior();
@@ -32,7 +35,7 @@ public void KeepMyBooleanPropertyFalseOnStart()
             // Arrange
 
             // Act
-            this.windowsSystem.RunOneLoop();
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
 
             // Assert
             Assert.False(this.component.MyBooleanProperty);
@@ -44,8 +47,8 @@ public void ChangeMyBooleanPropertyToTrueAfterTwoLoops()
             // Arrange
 
             // Act
-            this.windowsSystem.RunOneLoop();
-            this.windowsSystem.RunOneLoop();
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
 
             // Assert
             Assert.True(this.component.MyBooleanProperty);
@@ -57,8 +60,8 @@ public void KeepEntityAtOriginWithoutPressingUpKey()
             // Arrange
 
             // Act
-            this.windowsSystem.RunOneLoop();
-            this.windowsSystem.RunOneLoop();
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
 
             // Assert
             var transform3D = this.component.Owner.FindComponent<Transform3D>();
@@ -71,9 +74,9 @@ public void MoveEntityAfterPressingUpKey()
             // Arrange
 
             // Act
-            this.windowsSystem.RunOneLoop();
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
             this.windowsSystem.KeyboardDispatcher?.Press(Keys.Up);
-            this.windowsSystem.RunOneLoop();
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
 
             // Assert
             var transform3D = this.component.Owner.FindComponent<Transform3D>();
@@ -86,8 +89,8 @@ public void KeepEntityAtOriginWithoutMovingMouseWithLeftButtonPressed()
             // Arrange
 
             // Act
-            this.windowsSystem.RunOneLoop();
-            this.windowsSystem.RunOneLoop();
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
 
             // Assert
             var transform3D = this.component.Owner.FindComponent<Transform3D>();
@@ -101,11 +104,11 @@ public void MoveEntityAfterMovingMouseWithLeftButtonPressed()
             var mouseDispatcher = this.windowsSystem.MouseDispatcher!;
 
             // Act
-            this.windowsSystem.RunOneLoop();
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
             mouseDispatcher.Enter(0, 0);
             mouseDispatcher.Press(MouseButtons.Left);
             mouseDispatcher.Move(100, 0);
-            this.windowsSystem.RunOneLoop();
+            this.windowsSystem.RunOneLoop(this.fixedElapsedTime);
 
             // Assert
             var transform3D = this.component.Owner.FindComponent<Transform3D>();

diff --git a/src/Sample/Sample.Tests/MyComponentShould.cs b/src/Sample/Sample.Tests/MyComponentShould.cs
@@ -1,6 +1,7 @@
 using Evergine.Framework;
 using Evergine.Framework.Graphics;
 using Evergine.Mocks;
+using System;
 using Xunit;
 
 namespace Sample.Tests
@@ -41,7 +42,7 @@ public void ChangeMyBooleanPropertyToTrueOnStart()
             // Arrange
 
             // Act
-            this.windowsSystem.RunOneLoop();
+            this.windowsSystem.RunOneLoop(TimeSpan.FromSeconds(1d / 60));
 
             // Assert
             Assert.True(this.component.MyBooleanProperty);