Add default values and EnsureDefault() tests

Author: ne0rrmatrix

src/CommunityToolkit.Maui.Core/Primitives/Defaults/DockLayoutDefaults.shared.cs

@@ -0,0 +1,7 @@
+namespace CommunityToolkit.Maui.Core;
+static class DockLayoutDefaults
+{
+	public const bool ShouldExpandLastChild = true;
+	public const double HorizontalSpacing = 0.0d;
+	public const double VerticalSpacing = 0.0d;
+}

src/CommunityToolkit.Maui.Core/Primitives/Defaults/UniformItemLayoutDefaults.shared.cs

@@ -0,0 +1,7 @@
+namespace CommunityToolkit.Maui.Core;
+
+static class UniformItemLayoutDefaults
+{
+	public const int MaxRows = int.MaxValue;
+	public const int MaxColumns = int.MaxValue;
+}

src/CommunityToolkit.Maui.UnitTests/Layouts/DockLayoutTests.cs

@@ -41,6 +41,15 @@ public DockLayoutTests()
 		DockLayout.SetDockPosition(childBottomView, DockPosition.Bottom);
 	}
 
+	[Fact]
+	public void EnsureDefaults()
+	{
+		var layout = new DockLayout();
+		Assert.Equal(DockLayoutDefaults.ShouldExpandLastChild, layout.ShouldExpandLastChild);
+		Assert.Equal(DockLayoutDefaults.HorizontalSpacing, layout.HorizontalSpacing);
+		Assert.Equal(DockLayoutDefaults.VerticalSpacing, layout.VerticalSpacing);
+	}
+
 	#region Measure
 
 	[Fact]

src/CommunityToolkit.Maui.UnitTests/Layouts/UniformItemsLayoutTests.cs

@@ -1,4 +1,5 @@
-using CommunityToolkit.Maui.Layouts;
+using CommunityToolkit.Maui.Core;
+using CommunityToolkit.Maui.Layouts;
 using FluentAssertions;
 using Xunit;
 
@@ -109,6 +110,14 @@ public void ArrangeChildrenUniformItemsLayout()
 		Assert.Equal(childSize * childCount, actualSize);
 	}
 
+	[Fact]
+	public void EnsureDefaults()
+	{
+		var layout = new UniformItemsLayout();
+		Assert.Equal(UniformItemLayoutDefaults.MaxRows, layout.MaxRows);
+		Assert.Equal(UniformItemLayoutDefaults.MaxColumns, layout.MaxColumns);
+	}
+
 	class TestView : View
 	{
 		readonly Size size;

src/CommunityToolkit.Maui/Layouts/DockLayout.shared.cs

@@ -22,20 +22,20 @@ public partial class DockLayout : Layout, IDockLayout
 	/// If true, the last child is expanded to fill the remaining space (default: true).
 	/// </summary>
 	[BindableProperty(PropertyChangedMethodName = nameof(OnShouldExpandLastChildPropertyChanged))]
-	public partial bool ShouldExpandLastChild { get; set; } = true;
+	public partial bool ShouldExpandLastChild { get; set; } = DockLayoutDefaults.ShouldExpandLastChild;
 
 	/// <summary>
 	/// Gets or sets the horizontal spacing between child elements.
 	/// </summary>
 	[BindableProperty(PropertyChangedMethodName = nameof(OnHorizontalSpacingPropertyChanged))]
-	public partial double HorizontalSpacing { get; set; } = 0.0d;
+	public partial double HorizontalSpacing { get; set; } = DockLayoutDefaults.HorizontalSpacing;
 
 	/// <summary>
 	/// Gets or sets the vertical spacing between elements.
 	/// </summary>
 
 	[BindableProperty(PropertyChangedMethodName = nameof(OnVerticalSpacingPropertyChanged))]
-	public partial double VerticalSpacing { get; set; } = 0.0d;
+	public partial double VerticalSpacing { get; set; } = DockLayoutDefaults.VerticalSpacing;
 
 
 	/// <summary>

src/CommunityToolkit.Maui/Layouts/UniformItemsLayout.shared.cs

@@ -15,7 +15,7 @@ public partial class UniformItemsLayout : Layout, IUniformItemsLayout
 	/// Gets or sets the maximum number of rows to display or process.
 	/// </summary>
 	[BindableProperty(PropertyChangedMethodName = nameof(OnMaxRowsProperChanged))]
-	public partial int MaxRows { get; set; } = int.MaxValue;
+	public partial int MaxRows { get; set; } = UniformItemLayoutDefaults.MaxRows;
 
 	/// <summary>
 	/// Gets or sets the maximum number of columns to display in the layout.
@@ -24,7 +24,7 @@ public partial class UniformItemsLayout : Layout, IUniformItemsLayout
 	/// than or equal to 1. The default value is <see cref="int.MaxValue"/>, which allows an unlimited number of
 	/// columns.</remarks>
 	[BindableProperty(PropertyChangedMethodName = nameof(OnMaxColumnsProperChanged))]
-	public partial int MaxColumns { get; set; } = int.MaxValue;
+	public partial int MaxColumns { get; set; } = UniformItemLayoutDefaults.MaxColumns;
 
 	static void OnMaxRowsProperChanged(BindableObject bindable, object oldValue, object newValue)
 	{