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/TimeBoxDragTests.cs

@@ -0,0 +1,164 @@
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+using Avalonia.Headless.XUnit;
+using Avalonia.Input;
+using Ursa.Controls;
+
+namespace HeadlessTest.Ursa.Controls.TimeBoxTests;
+
+public class TimeBoxDragTests
+{
+    [AvaloniaFact]
+    public void TimeBox_AllowDrag_Should_Enable_Drag_Functionality()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox();
+        window.Content = timeBox;
+        window.Show();
+
+        // Test enabling drag
+        timeBox.AllowDrag = true;
+        Assert.True(timeBox.AllowDrag);
+
+        // Test disabling drag
+        timeBox.AllowDrag = false;
+        Assert.False(timeBox.AllowDrag);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_DragOrientation_Should_Control_Drag_Direction()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox { AllowDrag = true };
+        window.Content = timeBox;
+        window.Show();
+
+        // Test horizontal drag orientation
+        timeBox.DragOrientation = TimeBoxDragOrientation.Horizontal;
+        Assert.Equal(TimeBoxDragOrientation.Horizontal, timeBox.DragOrientation);
+
+        // Test vertical drag orientation
+        timeBox.DragOrientation = TimeBoxDragOrientation.Vertical;
+        Assert.Equal(TimeBoxDragOrientation.Vertical, timeBox.DragOrientation);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Handle_Focus_Events_When_Drag_Enabled()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox { AllowDrag = true };
+        window.Content = timeBox;
+        window.Show();
+
+        // Focus the control to enable interaction
+        timeBox.Focus();
+
+        // Test that the control can be focused
+        Assert.True(timeBox.IsFocused);
+        Assert.True(timeBox.AllowDrag);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Maintain_Time_During_Drag_Operations()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox { AllowDrag = true };
+        window.Content = timeBox;
+        window.Show();
+
+        var initialTime = new TimeSpan(12, 30, 45, 123);
+        timeBox.Time = initialTime;
+
+        // Enable drag and verify time is preserved
+        Assert.Equal(initialTime, timeBox.Time);
+        Assert.True(timeBox.AllowDrag);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Drag_Should_Work_With_Different_Time_Values()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox { AllowDrag = true };
+        window.Content = timeBox;
+        window.Show();
+
+        // Test with various time values
+        var testTimes = new[]
+        {
+            TimeSpan.Zero,
+            new TimeSpan(1, 0, 0),
+            new TimeSpan(12, 30, 45),
+            new TimeSpan(23, 59, 59, 999)
+        };
+
+        foreach (var testTime in testTimes)
+        {
+            timeBox.Time = testTime;
+            Assert.Equal(testTime, timeBox.Time);
+            Assert.True(timeBox.AllowDrag);
+        }
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Handle_Focus_Changes_With_Drag_Enabled()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox { AllowDrag = true };
+        var otherControl = new TextBox();
+        var panel = new StackPanel();
+        panel.Children.Add(timeBox);
+        panel.Children.Add(otherControl);
+        window.Content = panel;
+        window.Show();
+
+        // Test focusing the control
+        timeBox.Focus();
+        Assert.True(timeBox.IsFocused);
+
+        // Test focusing other control  
+        otherControl.Focus();
+        
+        // In headless mode, focus behavior might be different
+        // Just verify that otherControl can be focused and drag is still enabled
+        Assert.True(otherControl.IsFocused);
+        Assert.True(timeBox.AllowDrag);
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Should_Support_Both_Drag_Orientations()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox { AllowDrag = true };
+        window.Content = timeBox;
+        window.Show();
+
+        // Test all drag orientations
+        foreach (TimeBoxDragOrientation orientation in Enum.GetValues<TimeBoxDragOrientation>())
+        {
+            timeBox.DragOrientation = orientation;
+            Assert.Equal(orientation, timeBox.DragOrientation);
+            Assert.True(timeBox.AllowDrag);
+        }
+    }
+
+    [AvaloniaFact]
+    public void TimeBox_Drag_Should_Work_With_IsTimeLoop()
+    {
+        var window = new Window();
+        var timeBox = new TimeBox 
+        { 
+            AllowDrag = true,
+            IsTimeLoop = true
+        };
+        window.Content = timeBox;
+        window.Show();
+
+        // Test that drag and time loop can work together
+        Assert.True(timeBox.AllowDrag);
+        Assert.True(timeBox.IsTimeLoop);
+        
+        // Set a time value
+        timeBox.Time = new TimeSpan(12, 30, 45);
+        Assert.NotNull(timeBox.Time);
+    }
+}