feat: move to shared project. add unit tests.

src/Irihi.Avalonia.Shared/Helpers/LogicalHelpers.cs → src/Irihi.Avalonia.Shared.Public/Helpers/LogicalHelpers.cs

@@ -6,7 +6,7 @@ public static class LogicalHelpers
 {
     public static int CalculateDistanceFromLogicalParent<T>(this ILogical logical, int @default = -1) where T: ILogical
     {
-        int distance = @default;
+        int distance = 0;
         ILogical? parent = logical;
         while (parent is not null)
         {

src/Irihi.Avalonia.Shared.Public/Irihi.Avalonia.Shared.Public.projitems

@@ -19,6 +19,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Contracts\IPopupOuterContent.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\AvaloniaPropertyExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\BindingExtension.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\LogicalHelpers.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\ObservableExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\RoutedEventExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Reactive\ReadonlyDisposableCollection.cs" />

test/Irihi.Avalonia.Shared.UnitTest.Public/Helpers/LogicalHelpersTest.cs

@@ -0,0 +1,49 @@
+using Avalonia.Controls;
+using Irihi.Avalonia.Shared.Helpers;
+
+namespace Irihi.Avalonia.Shared.UnitTest.Helpers;
+
+public class LogicalHelpersTest
+{
+    [Fact]
+    public void CalculateDistanceFromLogicalParent_Null()
+    {
+        Assert.Equal(-1, (null as Button)!.CalculateDistanceFromLogicalParent<StackPanel>());
+    }
+
+    [Fact]
+    public void CalculateDistanceFromLogicalParent_Default()
+    {
+        var parent = new StackPanel();
+        var child = new Button();
+        parent.Children.Add(child);
+        Assert.Equal(1, child.CalculateDistanceFromLogicalParent<StackPanel>(-1));
+        Assert.Equal(-1, child.CalculateDistanceFromLogicalParent<Grid>(-1));
+    }
+
+    [Fact]
+    public void CalculateDistanceFromLogicalParent()
+    {
+        var parent = new StackPanel();
+        var child = new Grid();
+        var grandChild = new Button();
+        parent.Children.Add(child);
+        child.Children.Add(grandChild);
+        Assert.Equal(2, grandChild.CalculateDistanceFromLogicalParent<StackPanel>());
+        Assert.Equal(1, grandChild.CalculateDistanceFromLogicalParent<Grid>());
+        Assert.Equal(-1, grandChild.CalculateDistanceFromLogicalParent<Canvas>());
+    }
+
+    [Fact]
+    public void CalculateDistanceFromLogicalParent_Self()
+    {
+        var parent = new StackPanel();
+        var child = new Grid();
+        var grandChild = new Button();
+        parent.Children.Add(child);
+        child.Children.Add(grandChild);
+        Assert.Equal(2, grandChild.CalculateDistanceFromLogicalParent<StackPanel>());
+        Assert.Equal(1, grandChild.CalculateDistanceFromLogicalParent<Grid>());
+        Assert.Equal(0, grandChild.CalculateDistanceFromLogicalParent<Button>());
+    }
+}

test/Irihi.Avalonia.Shared.UnitTest.Public/Irihi.Avalonia.Shared.UnitTest.Public.projitems

@@ -13,6 +13,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\AffectsPseudoClassTests.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\AvaloniaPropertyExtensionTest.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\BindingExtensionTest.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\LogicalHelpersTest.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\ObservableExtensionTest.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\PropertyPseudoClassHelperTest.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\RoutedEventExtensionTest.cs" />