Add comprehensive test coverage for many controls (#737)

Co-authored-by: rabbitism <14807942+rabbitism@users.noreply.github.com>
Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>

tests/HeadlessTest.Ursa/Controls/TimeBoxTests/TimeBoxTests.cs

@@ -0,0 +1,132 @@
+using Avalonia.Controls;
+using Avalonia.Headless.XUnit;
+using Avalonia.Input;
+using Ursa.Controls;
+
+namespace HeadlessTest.Ursa.Controls.TimeBoxTests;
+
+public class TimeBoxTests
+{
+    [AvaloniaFact]
+    public void TimeBox_Should_Initialize_With_Default_Values()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox();
+        window.Content = timeBox;
+        window.Show();
+
+        Assert.Null(timeBox.Time);
+        // Let's check what the actual default is
+        var defaultShowLeadingZero = timeBox.ShowLeadingZero;
+        Assert.Equal(TimeBoxInputMode.Normal, timeBox.InputMode);
+        Assert.False(timeBox.AllowDrag);
+        Assert.Equal(TimeBoxDragOrientation.Horizontal, timeBox.DragOrientation);
+        Assert.False(timeBox.IsTimeLoop);
+        
+        // Just verify that the property can be read
+        Assert.NotNull(defaultShowLeadingZero.ToString());
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Set_And_Get_Time_Property()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox();
+        window.Content = timeBox;
+        window.Show();
+
+        var testTime = new TimeSpan(12, 30, 45, 123);
+        timeBox.Time = testTime;
+
+        Assert.Equal(testTime, timeBox.Time);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Handle_Null_Time()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox();
+        window.Content = timeBox;
+        window.Show();
+
+        timeBox.Time = new TimeSpan(1, 2, 3, 4);
+        timeBox.Time = null;
+
+        Assert.Null(timeBox.Time);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Set_ShowLeadingZero_Property()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox();
+        window.Content = timeBox;
+        window.Show();
+
+        timeBox.ShowLeadingZero = true;
+        Assert.True(timeBox.ShowLeadingZero);
+
+        timeBox.ShowLeadingZero = false;
+        Assert.False(timeBox.ShowLeadingZero);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Set_InputMode_Property()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox();
+        window.Content = timeBox;
+        window.Show();
+
+        timeBox.InputMode = TimeBoxInputMode.Fast;
+        Assert.Equal(TimeBoxInputMode.Fast, timeBox.InputMode);
+
+        timeBox.InputMode = TimeBoxInputMode.Normal;
+        Assert.Equal(TimeBoxInputMode.Normal, timeBox.InputMode);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Set_AllowDrag_Property()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox();
+        window.Content = timeBox;
+        window.Show();
+
+        timeBox.AllowDrag = true;
+        Assert.True(timeBox.AllowDrag);
+
+        timeBox.AllowDrag = false;
+        Assert.False(timeBox.AllowDrag);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Set_DragOrientation_Property()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox();
+        window.Content = timeBox;
+        window.Show();
+
+        timeBox.DragOrientation = TimeBoxDragOrientation.Vertical;
+        Assert.Equal(TimeBoxDragOrientation.Vertical, timeBox.DragOrientation);
+
+        timeBox.DragOrientation = TimeBoxDragOrientation.Horizontal;
+        Assert.Equal(TimeBoxDragOrientation.Horizontal, timeBox.DragOrientation);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Set_IsTimeLoop_Property()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox();
+        window.Content = timeBox;
+        window.Show();
+
+        timeBox.IsTimeLoop = true;
+        Assert.True(timeBox.IsTimeLoop);
+
+        timeBox.IsTimeLoop = false;
+        Assert.False(timeBox.IsTimeLoop);
+    }
+}