// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
#nullable enable
 
using System.Windows.Forms.Design.Behavior;
 
namespace System.Windows.Forms.Design.Tests;
 
public sealed class ToolStripContentPanelDesignerTests : IDisposable
{
    private readonly ToolStripContentPanelDesigner _toolStripContentPanelDesigner;
    private readonly ToolStripContentPanel _toolStripContentPanel;
 
    public ToolStripContentPanelDesignerTests()
    {
        _toolStripContentPanelDesigner = new();
        _toolStripContentPanel = new();
        _toolStripContentPanelDesigner.Initialize(_toolStripContentPanel);
    }
 
    public void Dispose()
    {
        _toolStripContentPanelDesigner.Dispose();
        _toolStripContentPanel.Dispose();
    }
 
    [Fact]
    public void SnapLines_ShouldReturnNonNullList()
    {
        IList<SnapLine> snapLines = _toolStripContentPanelDesigner.SnapLines.Cast<SnapLine>().ToList();
 
        snapLines.Should().NotBeNull();
    }
 
    [Fact]
    public void SnapLines_ShouldCallAddPaddingSnapLines()
    {
        string?[] paddingFilters = [SnapLine.PaddingLeft, SnapLine.PaddingRight, SnapLine.PaddingTop, SnapLine.PaddingBottom];
 
        List<SnapLine> snapLines = _toolStripContentPanelDesigner.SnapLines.Cast<SnapLine>().ToList();
 
        bool containsPaddingSnapLines = snapLines.Any(snapLine => paddingFilters.Contains(snapLine.Filter));
 
        containsPaddingSnapLines.Should().BeTrue();
    }
 
    [Fact]
    public void CanBeParentedTo_ShouldReturnFalse_WhenParentDesignerIsNull()
    {
        bool result = _toolStripContentPanelDesigner.CanBeParentedTo(parentDesigner: null!);
 
        result.Should().BeFalse();
    }
 
    [Fact]
    public void CanBeParentedTo_ShouldReturnFalse_WhenParentDesignerIsNotNull()
    {
        using PanelDesigner parentDesigner = new();
        using Panel panel = new();
        parentDesigner.Initialize(panel);
 
        bool result = _toolStripContentPanelDesigner.CanBeParentedTo(parentDesigner);
 
        result.Should().BeFalse();
    }
}