gui-cs.Terminal.Gui/UnitTests/View/FindDeepestViewTests.cs

using UICatalog.Scenarios;
using Xunit.Abstractions;

namespace Terminal.Gui.ViewTests;

/// <summary>
/// Tests View.FindDeepestView
/// </summary>
/// <param name="output"></param>
public class FindDeepestViewTests (ITestOutputHelper output)
{
    // Test that FindDeepestView returns the correct view if the start view has no subviews
    [Theory]
    [InlineData (0, 0)]
    [InlineData (1, 1)]
    [InlineData (2, 2)]
    public void Returns_Start_If_No_SubViews (int testX, int testY)
    {
        var view = new View ()
        {
            Width = 10, Height = 10,
        };

        Assert.Same (view, View.FindDeepestView (view, testX, testY, out _, out _));
    }

    // Test that FindDeepestView returns null if the start view has no subviews and coords are outside the view
    [Theory]
    [InlineData (0, 0)]
    [InlineData (2, 1)]
    [InlineData (20, 20)]
    public void Returns_Null_If_No_SubViews_Coords_Outside (int testX, int testY)
    {
        var view = new View ()
        {
            X = 1, Y = 2,
            Width = 10, Height = 10,
        };

        Assert.Null(View.FindDeepestView (view, testX, testY, out _, out _));
    }

    // Test that FindDeepestView returns the correct view if the start view has subviews
    [Theory]
    [InlineData (0, 0, false)]
    [InlineData (1, 1, false)]
    [InlineData (9, 9, false)]
    [InlineData (10, 10, false)]
    [InlineData (6, 7, false)]

    [InlineData (1, 2, true)]
    [InlineData (5, 6, true)]
    public void Returns_Correct_If_SubViews (int testX, int testY, bool expectedSubViewFound)
    {
        var view = new View ()
        {
            Width = 10, Height = 10,
        };

        var subview = new View ()
        {
            X = 1, Y = 2,
            Width = 5, Height = 5,
        };
        view.Add (subview);

        var found = View.FindDeepestView (view, testX, testY, out _, out _);

        Assert.Equal (expectedSubViewFound, found == subview);
    }

    // Test that FindDeepestView works if the start view has positive Adornments
    [Theory]
    [InlineData (0, 0, false)]
    [InlineData (1, 1, false)]
    [InlineData (9, 9, false)]
    [InlineData (10, 10, false)]
    [InlineData (7, 8, false)]
    [InlineData (1, 2, false)]

    [InlineData (2, 3, true)]
    [InlineData (5, 6, true)]
    [InlineData (2, 3, true)]
    [InlineData (6, 7, true)]
    public void Returns_Correct_If_Start_Has_Adornments (int testX, int testY, bool expectedSubViewFound)
    {
        var view = new View ()
        {
            Width = 10, Height = 10,
        };
        view.Margin.Thickness = new Thickness (1);

        var subview = new View ()
        {
            X = 1, Y = 2,
            Width = 5, Height = 5,
        };
        view.Add (subview);

        var found = View.FindDeepestView (view, testX, testY, out _, out _);

        Assert.Equal (expectedSubViewFound, found == subview);
    }

    // Test that FindDeepestView works if the subview has positive Adornments
    [Theory]
    [InlineData (0, 0, false)]
    [InlineData (1, 1, false)]
    [InlineData (9, 9, false)]
    [InlineData (10, 10, false)]
    [InlineData (7, 8, false)]
    [InlineData (6, 7, false)]

    [InlineData (1, 2, true)]
    [InlineData (2, 3, true)]
    [InlineData (5, 6, true)]
    [InlineData (2, 3, true)]
    public void Returns_Correct_If_SubView_Has_Adornments (int testX, int testY, bool expectedSubViewFound)
    {
        var view = new View ()
        {
            Width = 10, Height = 10,
        };

        var subview = new View ()
        {
            X = 1, Y = 2,
            Width = 5, Height = 5,
        };
        subview.Margin.Thickness = new Thickness (1);
        view.Add (subview);

        var found = View.FindDeepestView (view, testX, testY, out _, out _);

        Assert.Equal (expectedSubViewFound, found == subview);
    }

    // Test that FindDeepestView works with nested subviews
    [Theory]
    [InlineData (0, 0, -1)]
    [InlineData (9, 9, -1)]
    [InlineData (10, 10, -1)]

    [InlineData (1, 1, 0)]
    [InlineData (1, 2, 0)]
    [InlineData (2, 2, 1)]
    [InlineData (3, 3, 2)]
    [InlineData (5, 5, 2)]
    public void Returns_Correct_With_NestedSubViews (int testX, int testY, int expectedSubViewFound)
    {
        var start = new View ()
        {
            Width = 10, Height = 10
        };

        int numSubViews = 3;
        List<View> subviews = new List<View> ();
        for (int i = 0; i < numSubViews; i++)
        {
            var subview = new View ()
            {
                X = 1, Y = 1,
                Width = 5, Height = 5,
            };
            subviews.Add (subview);

            if (i > 0)
            {
                subviews [i - 1].Add (subview);
            }
        }

        start.Add (subviews [0]);

        var found = View.FindDeepestView (start, testX, testY, out _, out _);
        Assert.Equal (expectedSubViewFound, subviews.IndexOf(found));
    }
}