// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.ComponentModel;
 
namespace System.Windows.Forms.Tests;
 
// NB: doesn't require thread affinity
public class SelectedGridItemChangedEventArgsTests
{
    public static IEnumerable<object[]> Ctor_GridItem_Object_TestData()
    {
        yield return new object[] { null, null };
        yield return new object[] { new SubGridItem(), null };
        yield return new object[] { null, new SubGridItem() };
        yield return new object[] { new SubGridItem(), new SubGridItem() };
    }
 
    [Theory]
    [MemberData(nameof(Ctor_GridItem_Object_TestData))]
    public void Ctor_GridItem_GridItem(GridItem oldSel, GridItem newSel)
    {
        SelectedGridItemChangedEventArgs e = new(oldSel, newSel);
        Assert.Equal(oldSel, e.OldSelection);
        Assert.Equal(newSel, e.NewSelection);
    }
 
    private class SubGridItem : GridItem
    {
        public override GridItemCollection GridItems { get; }
 
        public override GridItemType GridItemType { get; }
 
        public override string Label { get; }
 
        public override GridItem Parent { get; }
 
        public override PropertyDescriptor PropertyDescriptor { get; }
 
        public override object Value { get; }
 
        public override bool Select() => false;
    }
}