From 22b3a342a81d3af7f829b13936cc720aac55af0e Mon Sep 17 00:00:00 2001
From: Syntriax <syntriax@gmail.com>
Date: Tue, 5 Aug 2025 09:48:50 +0300
Subject: [PATCH] feat: basic universe object tests

---
 Engine.Tests/Core/UniverseObject_Tests.cs | 272 ++++++++++++++++++++++
 1 file changed, 272 insertions(+)
 create mode 100644 Engine.Tests/Core/UniverseObject_Tests.cs

diff --git a/Engine.Tests/Core/UniverseObject_Tests.cs b/Engine.Tests/Core/UniverseObject_Tests.cs
new file mode 100644
index 0000000..4ece05e
--- /dev/null
+++ b/Engine.Tests/Core/UniverseObject_Tests.cs
@@ -0,0 +1,272 @@
+using Syntriax.Engine.Core;
+
+namespace Engine.Tests;
+
+public class UniverseObject_Tests
+{
+    private static IUniverseObject CreateUniverseObject()
+    {
+        UniverseObject universeObject = new();
+        BehaviourController behaviourController = new();
+
+        universeObject.Assign(new StateEnable());
+
+        behaviourController.Assign(new StateEnable());
+        behaviourController.StateEnable.Assign(behaviourController);
+
+        behaviourController.Assign(universeObject);
+        universeObject.Assign(behaviourController);
+
+        universeObject.Initialize();
+        behaviourController.Initialize();
+
+        return universeObject;
+    }
+
+    [Fact]
+    public void AddChildren()
+    {
+        IUniverseObject parentUO = CreateUniverseObject();
+        IUniverseObject childUO = CreateUniverseObject();
+
+        parentUO.AddChild(childUO);
+        Assert.NotEmpty(parentUO.Children);
+        Assert.Equal(parentUO.Children[0], childUO);
+        Assert.Equal(childUO.Parent, parentUO);
+    }
+
+    [Fact]
+    public void RemoveChildren()
+    {
+        IUniverseObject parentUO = CreateUniverseObject();
+        IUniverseObject childUO = CreateUniverseObject();
+
+        parentUO.AddChild(childUO);
+        Assert.NotEmpty(parentUO.Children);
+        Assert.Contains(childUO, parentUO.Children);
+        Assert.Equal(childUO.Parent, parentUO);
+
+        parentUO.RemoveChild(childUO);
+        Assert.Empty(parentUO.Children);
+        Assert.Null(childUO.Parent);
+    }
+
+    [Fact]
+    public void SetParentValue()
+    {
+        IUniverseObject parentUO = CreateUniverseObject();
+        IUniverseObject childUO = CreateUniverseObject();
+
+        childUO.Parent = parentUO;
+        Assert.Contains(childUO, parentUO.Children);
+        Assert.Equal(childUO.Parent, parentUO);
+    }
+
+    [Fact]
+    public void SetParentNull()
+    {
+        IUniverseObject parentUO = CreateUniverseObject();
+        IUniverseObject childUO = CreateUniverseObject();
+
+        parentUO.AddChild(childUO);
+
+        childUO.Parent = null;
+        Assert.Empty(parentUO.Children);
+        Assert.Null(childUO.Parent);
+    }
+
+    [Fact]
+    public void AddChildrenEvents()
+    {
+        IUniverseObject parentUO = CreateUniverseObject();
+        IUniverseObject childUO = CreateUniverseObject();
+
+        IUniverseObject? sender = null;
+        IUniverseObject.ChildrenAddedArguments? arguments = null;
+
+        parentUO.OnChildrenAdded.AddListener((s, a) =>
+        {
+            sender = s;
+            arguments = a;
+        });
+
+        parentUO.AddChild(childUO);
+        Assert.NotNull(sender);
+        Assert.NotNull(arguments);
+        Assert.Equal(parentUO, sender);
+        Assert.Equal(childUO, arguments.Value.ChildrenAdded);
+    }
+
+    [Fact]
+    public void RemoveChildrenEvents()
+    {
+        IUniverseObject parentUO = CreateUniverseObject();
+        IUniverseObject childUO = CreateUniverseObject();
+
+        IUniverseObject? sender = null;
+        IUniverseObject.ChildrenRemovedArguments? arguments = null;
+
+        parentUO.AddChild(childUO);
+
+        parentUO.OnChildrenRemoved.AddListener((s, a) =>
+        {
+            sender = s;
+            arguments = a;
+        });
+
+        parentUO.RemoveChild(childUO);
+
+        Assert.NotNull(sender);
+        Assert.NotNull(arguments);
+        Assert.Equal(parentUO, sender);
+        Assert.Equal(childUO, arguments.Value.ChildrenRemoved);
+    }
+
+    [Fact]
+    public void SetParentEvents()
+    {
+        IUniverseObject parentUO = CreateUniverseObject();
+        IUniverseObject childUO = CreateUniverseObject();
+
+        IUniverseObject? sender = null;
+        IUniverseObject.ParentChangedArguments? arguments = null;
+
+        childUO.OnParentChanged.AddListener((s, a) =>
+        {
+            sender = s;
+            arguments = a;
+        });
+
+        childUO.Parent = parentUO;
+
+        Assert.NotNull(sender);
+        Assert.NotNull(arguments);
+        Assert.Equal(childUO, sender);
+        Assert.Null(arguments.Value.PreviousParent);
+        Assert.Equal(parentUO, arguments.Value.CurrentParent);
+    }
+
+    [Fact]
+    public void UnsetParentEvents()
+    {
+        IUniverseObject parentUO = CreateUniverseObject();
+        IUniverseObject childUO = CreateUniverseObject();
+
+        IUniverseObject? sender = null;
+        IUniverseObject.ParentChangedArguments? arguments = null;
+
+        childUO.Parent = parentUO;
+
+        childUO.OnParentChanged.AddListener((s, a) =>
+        {
+            sender = s;
+            arguments = a;
+        });
+
+        childUO.Parent = null;
+
+        Assert.NotNull(sender);
+        Assert.NotNull(arguments);
+        Assert.Equal(childUO, sender);
+        Assert.Equal(parentUO, arguments.Value.PreviousParent);
+        Assert.Null(arguments.Value.CurrentParent);
+    }
+
+    [Fact]
+    public void Active()
+    {
+        IUniverseObject universeObject = CreateUniverseObject();
+        universeObject.StateEnable.Enabled = true;
+
+        Assert.True(universeObject.IsActive);
+    }
+
+    [Fact]
+    public void NotActiveWhenDisabled()
+    {
+        IUniverseObject universeObject = CreateUniverseObject();
+        universeObject.StateEnable.Enabled = false;
+
+        Assert.False(universeObject.IsActive);
+    }
+
+    [Fact]
+    public void ActiveEvents()
+    {
+        IUniverseObject universeObject = CreateUniverseObject();
+        universeObject.StateEnable.Enabled = true;
+
+        IActive? sender = null;
+        IActive.ActiveChangedArguments? arguments = null;
+
+        universeObject.OnActiveChanged.AddListener((s, a) =>
+        {
+            sender = s;
+            arguments = a;
+        });
+
+        universeObject.StateEnable.Enabled = false;
+
+        Assert.NotNull(sender);
+        Assert.NotNull(arguments);
+
+        Assert.False(universeObject.IsActive);
+        Assert.True(arguments.Value.PreviousState);
+    }
+
+    [Fact]
+    public void NotActiveEvents()
+    {
+        IUniverseObject universeObject = CreateUniverseObject();
+        universeObject.StateEnable.Enabled = false;
+
+        IActive? sender = null;
+        IActive.ActiveChangedArguments? arguments = null;
+
+        universeObject.OnActiveChanged.AddListener((s, a) =>
+        {
+            sender = s;
+            arguments = a;
+        });
+
+        universeObject.StateEnable.Enabled = true;
+
+        Assert.NotNull(sender);
+        Assert.NotNull(arguments);
+
+        Assert.True(universeObject.IsActive);
+        Assert.False(arguments.Value.PreviousState);
+    }
+
+    [Fact]
+    public void SetName()
+    {
+        IUniverseObject universeObject = CreateUniverseObject();
+        universeObject.Name = "Test";
+        Assert.Equal("Test", universeObject.Name);
+    }
+
+    [Fact]
+    public void SetNameEvents()
+    {
+        IUniverseObject universeObject = CreateUniverseObject();
+        universeObject.Name = "Previous";
+
+        INameable? sender = null;
+        INameable.NameChangedArguments? arguments = null;
+
+        universeObject.OnNameChanged.AddListener((s, a) =>
+        {
+            sender = s;
+            arguments = a;
+        });
+
+        universeObject.Name = "Test";
+
+        Assert.NotNull(sender);
+        Assert.NotNull(arguments);
+
+        Assert.Equal("Test", universeObject.Name);
+        Assert.Equal("Previous", arguments.Value.PreviousName);
+    }
+}