gui-cs.Terminal.Gui/UnitTests/View/Layout/LayoutTests.cs

using System;
using Xunit;
using Xunit.Abstractions;

// Alias Console to MockConsole so we don't accidentally use Console
using Console = Terminal.Gui.FakeConsole;

namespace Terminal.Gui.ViewTests {
	public class LayoutTests {
		readonly ITestOutputHelper output;

		public LayoutTests (ITestOutputHelper output)
		{
			this.output = output;
		}

		[Fact]
		public void TopologicalSort_Missing_Add ()
		{
			var root = new View ();
			var sub1 = new View ();
			root.Add (sub1);
			var sub2 = new View ();
			sub1.Width = Dim.Width (sub2);

			Assert.Throws<InvalidOperationException> (() => root.LayoutSubviews ());

			sub2.Width = Dim.Width (sub1);

			Assert.Throws<InvalidOperationException> (() => root.LayoutSubviews ());
		}

		[Fact]
		public void TopologicalSort_Recursive_Ref ()
		{
			var root = new View ();
			var sub1 = new View ();
			root.Add (sub1);
			var sub2 = new View ();
			root.Add (sub2);
			sub2.Width = Dim.Width (sub2);

			var exception = Record.Exception (root.LayoutSubviews);
			Assert.Null (exception);
		}

		[Fact]
		public void LayoutSubviews_No_SuperView ()
		{
			var root = new View ();
			var first = new View () { Id = "first", X = 1, Y = 2, Height = 3, Width = 4 };
			root.Add (first);

			var second = new View () { Id = "second" };
			root.Add (second);

			second.X = Pos.Right (first) + 1;

			root.LayoutSubviews ();

			Assert.Equal (6, second.Frame.X);
		}

		[Fact]
		public void LayoutSubviews_RootHas_SuperView ()
		{
			var top = new View ();
			var root = new View ();
			top.Add (root);

			var first = new View () { Id = "first", X = 1, Y = 2, Height = 3, Width = 4 };
			root.Add (first);

			var second = new View () { Id = "second" };
			root.Add (second);

			second.X = Pos.Right (first) + 1;

			root.LayoutSubviews ();

			Assert.Equal (6, second.Frame.X);
		}


		[Fact]
		public void LayoutSubviews_ViewThatRefsSubView_Throws ()
		{
			var root = new View ();
			var super = new View ();
			root.Add (super);
			var sub = new View ();
			super.Add (sub);
			super.Width = Dim.Width (sub);
			Assert.Throws<InvalidOperationException> (() => root.LayoutSubviews ());
		}

		[Fact, AutoInitShutdown]
		public void TrySetWidth_ForceValidatePosDim ()
		{
			var top = new View () {
				X = 0,
				Y = 0,
				Width = 80,
			};

			var v = new View () {
				Width = Dim.Fill (),
				ForceValidatePosDim = true
			};
			top.Add (v);

			Assert.False (v.TrySetWidth (70, out int rWidth));
			Assert.Equal (70, rWidth);

			v.Width = Dim.Fill (1);
			Assert.False (v.TrySetWidth (70, out rWidth));
			Assert.Equal (69, rWidth);

			v.Width = null;
			Assert.True (v.TrySetWidth (70, out rWidth));
			Assert.Equal (70, rWidth);
			Assert.False (v.IsInitialized);

			Application.Top.Add (top);
			Application.Begin (Application.Top);

			Assert.True (v.IsInitialized);
			v.Width = Dim.Fill (1);
			Assert.Throws<ArgumentException> (() => v.Width = 75);
			v.LayoutStyle = LayoutStyle.Absolute;
			v.Width = 75;
			Assert.True (v.TrySetWidth (60, out rWidth));
			Assert.Equal (60, rWidth);
		}

		[Fact, AutoInitShutdown]
		public void TrySetHeight_ForceValidatePosDim ()
		{
			var top = new View () {
				X = 0,
				Y = 0,
				Height = 20
			};

			var v = new View () {
				Height = Dim.Fill (),
				ForceValidatePosDim = true
			};
			top.Add (v);

			Assert.False (v.TrySetHeight (10, out int rHeight));
			Assert.Equal (10, rHeight);

			v.Height = Dim.Fill (1);
			Assert.False (v.TrySetHeight (10, out rHeight));
			Assert.Equal (9, rHeight);

			v.Height = null;
			Assert.True (v.TrySetHeight (10, out rHeight));
			Assert.Equal (10, rHeight);
			Assert.False (v.IsInitialized);

			Application.Top.Add (top);
			Application.Begin (Application.Top);

			Assert.True (v.IsInitialized);

			v.Height = Dim.Fill (1);
			Assert.Throws<ArgumentException> (() => v.Height = 15);
			v.LayoutStyle = LayoutStyle.Absolute;
			v.Height = 15;
			Assert.True (v.TrySetHeight (5, out rHeight));
			Assert.Equal (5, rHeight);
		}

		[Fact]
		public void GetCurrentWidth_TrySetWidth ()
		{
			var top = new View () {
				X = 0,
				Y = 0,
				Width = 80,
			};

			var v = new View () {
				Width = Dim.Fill ()
			};
			top.Add (v);
			top.BeginInit ();
			top.EndInit ();
			top.LayoutSubviews ();

			Assert.False (v.AutoSize);
			Assert.True (v.TrySetWidth (0, out _));
			Assert.Equal (80, v.Frame.Width);

			v.Width = Dim.Fill (1);
			top.LayoutSubviews ();

			Assert.True (v.TrySetWidth (0, out _));
			Assert.Equal (79, v.Frame.Width);

			v.AutoSize = true;
			top.LayoutSubviews ();

			Assert.True (v.TrySetWidth (0, out _));
		}

		[Fact]
		public void GetCurrentHeight_TrySetHeight ()
		{
			var top = new View () {
				X = 0,
				Y = 0,
				Height = 20
			};

			var v = new View () {
				Height = Dim.Fill ()
			};
			top.Add (v);
			top.BeginInit ();
			top.EndInit ();
			top.LayoutSubviews ();

			Assert.False (v.AutoSize);
			Assert.True (v.TrySetHeight (0, out _));
			Assert.Equal (20, v.Frame.Height);

			v.Height = Dim.Fill (1);
			top.LayoutSubviews ();

			Assert.True (v.TrySetHeight (0, out _));
			Assert.Equal (19, v.Frame.Height);

			v.AutoSize = true;
			top.LayoutSubviews ();

			Assert.True (v.TrySetHeight (0, out _));
		}

		[Fact]
		public void AutoSize_False_If_Text_Emmpty ()
		{
			var view1 = new View ();
			var view2 = new View ("");
			var view3 = new View () { Text = "" };

			Assert.False (view1.AutoSize);
			Assert.False (view2.AutoSize);
			Assert.False (view3.AutoSize);
		}

		[Fact]
		public void AutoSize_False_If_Text_Is_Not_Emmpty ()
		{
			var view1 = new View ();
			view1.Text = "Hello World";
			var view2 = new View ("Hello World");
			var view3 = new View () { Text = "Hello World" };

			Assert.False (view1.AutoSize);
			Assert.False (view2.AutoSize);
			Assert.False (view3.AutoSize);
		}

		[Fact]
		public void AutoSize_True_Label_If_Text_Emmpty ()
		{
			var label1 = new Label ();
			var label2 = new Label ("");
			var label3 = new Label () { Text = "" };

			Assert.True (label1.AutoSize);
			Assert.True (label2.AutoSize);
			Assert.True (label3.AutoSize);
		}

		[Fact]
		public void AutoSize_True_Label_If_Text_Is_Not_Emmpty ()
		{
			var label1 = new Label ();
			label1.Text = "Hello World";
			var label2 = new Label ("Hello World");
			var label3 = new Label () { Text = "Hello World" };

			Assert.True (label1.AutoSize);
			Assert.True (label2.AutoSize);
			Assert.True (label3.AutoSize);
		}

		[Fact]
		public void AutoSize_False_ResizeView_Is_Always_False ()
		{
			var super = new View ();
			var label = new Label () { AutoSize = false };
			super.Add (label);

			label.Text = "New text";
			super.LayoutSubviews ();

			Assert.False (label.AutoSize);
			Assert.Equal ("(0,0,0,1)", label.Bounds.ToString ());
		}

		[Fact]
		public void AutoSize_True_ResizeView_With_Dim_Absolute ()
		{
			var super = new View ();
			var label = new Label ();

			label.Text = "New text";
			// BUGBUG: v2 - label was never added to super, so it was never laid out.
			super.Add (label);
			super.LayoutSubviews ();

			Assert.True (label.AutoSize);
			Assert.Equal ("(0,0,8,1)", label.Bounds.ToString ());
		}

		[Fact, AutoInitShutdown]
		public void AutoSize_False_ResizeView_With_Dim_Fill_After_IsInitialized ()
		{
			var win = new Window (new Rect (0, 0, 30, 80));
			var label = new Label () { AutoSize = false, Width = Dim.Fill (), Height = Dim.Fill () };
			win.Add (label);
			Application.Top.Add (win);

			// Text is empty so height=0
			Assert.False (label.AutoSize);
			Assert.Equal ("(0,0,0,0)", label.Bounds.ToString ());

			label.Text = "New text\nNew line";
			Application.Top.LayoutSubviews ();

			Assert.False (label.AutoSize);
			Assert.Equal ("(0,0,28,78)", label.Bounds.ToString ());
			Assert.False (label.IsInitialized);

			Application.Begin (Application.Top);
			Assert.True (label.IsInitialized);
			Assert.False (label.AutoSize);
			Assert.Equal ("(0,0,28,78)", label.Bounds.ToString ());
		}

		[Fact, AutoInitShutdown]
		public void AutoSize_False_SetWidthHeight_With_Dim_Fill_And_Dim_Absolute_After_IsAdded_And_IsInitialized ()
		{
			var win = new Window (new Rect (0, 0, 30, 80));
			var label = new Label () { Width = Dim.Fill () };
			win.Add (label);
			Application.Top.Add (win);

			Assert.True (label.IsAdded);

			// Text is empty so height=0
			Assert.True (label.AutoSize);
			// BUGBUG: LayoutSubviews has not been called, so this test is not really valid (pos/dim are indeterminate, not 0)
			Assert.Equal ("(0,0,0,0)", label.Bounds.ToString ());

			label.Text = "First line\nSecond line";
			Application.Top.LayoutSubviews ();

			Assert.True (label.AutoSize);
			// BUGBUG: This test is bogus: label has not been initialized. pos/dim is indeterminate!
			Assert.Equal ("(0,0,28,2)", label.Bounds.ToString ());
			Assert.False (label.IsInitialized);

			Application.Begin (Application.Top);

			Assert.True (label.AutoSize);
			Assert.Equal ("(0,0,28,2)", label.Bounds.ToString ());
			Assert.True (label.IsInitialized);

			label.AutoSize = false;
			Application.Refresh ();

			Assert.False (label.AutoSize);
			Assert.Equal ("(0,0,28,1)", label.Bounds.ToString ());
		}

		[Fact, AutoInitShutdown]
		public void AutoSize_False_SetWidthHeight_With_Dim_Fill_And_Dim_Absolute_With_Initialization ()
		{
			var win = new Window (new Rect (0, 0, 30, 80));
			var label = new Label () { Width = Dim.Fill () };
			win.Add (label);
			Application.Top.Add (win);

			// Text is empty so height=0
			Assert.True (label.AutoSize);
			Assert.Equal ("(0,0,0,0)", label.Bounds.ToString ());

			Application.Begin (Application.Top);

			Assert.True (label.AutoSize);
			// Here the AutoSize ensuring the right size with width 28 (Dim.Fill)
			// and height 0 because wasn't set and the text is empty
			// BUGBUG: Because of #2450, this test is bogus: pos/dim is indeterminate!
			//Assert.Equal ("(0,0,28,0)", label.Bounds.ToString ());

			label.Text = "First line\nSecond line";
			Application.Refresh ();

			// Here the AutoSize ensuring the right size with width 28 (Dim.Fill)
			// and height 2 because wasn't set and the text has 2 lines
			Assert.True (label.AutoSize);
			Assert.Equal ("(0,0,28,2)", label.Bounds.ToString ());

			label.AutoSize = false;
			Application.Refresh ();

			// Here the SetMinWidthHeight ensuring the minimum height
			Assert.False (label.AutoSize);
			Assert.Equal ("(0,0,28,1)", label.Bounds.ToString ());

			label.Text = "First changed line\nSecond changed line\nNew line";
			Application.Refresh ();

			// Here the AutoSize is false and the width 28 (Dim.Fill) and
			// height 1 because wasn't set and SetMinWidthHeight ensuring the minimum height
			Assert.False (label.AutoSize);
			Assert.Equal ("(0,0,28,1)", label.Bounds.ToString ());

			label.AutoSize = true;
			Application.Refresh ();

			// Here the AutoSize ensuring the right size with width 28 (Dim.Fill)
			// and height 3 because wasn't set and the text has 3 lines
			Assert.True (label.AutoSize);
			// BUGBUG: v2 - AutoSize is broken - temporarily disabling test See #2432
			//Assert.Equal ("(0,0,28,3)", label.Bounds.ToString ());
		}

		[Fact, AutoInitShutdown]
		public void AutoSize_True_Setting_With_Height_Horizontal ()
		{
			var label = new Label ("Hello") { Width = 10, Height = 2 };
			var viewX = new View ("X") { X = Pos.Right (label) };
			var viewY = new View ("Y") { Y = Pos.Bottom (label) };

			Application.Top.Add (label, viewX, viewY);
			Application.Begin (Application.Top);

			Assert.True (label.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 2), label.Frame);

			var expected = @"
Hello     X
           
Y          
";

			var pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 11, 3), pos);

			label.AutoSize = false;
			Application.Refresh ();

			Assert.False (label.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 2), label.Frame);

			expected = @"
Hello     X
           
Y          
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 11, 3), pos);
		}

		[Fact, AutoInitShutdown]
		public void AutoSize_True_Setting_With_Height_Vertical ()
		{
			var label = new Label ("Hello") { Width = 2, Height = 10, TextDirection = TextDirection.TopBottom_LeftRight };
			var viewX = new View ("X") { X = Pos.Right (label) };
			var viewY = new View ("Y") { Y = Pos.Bottom (label) };

			Application.Top.Add (label, viewX, viewY);
			Application.Begin (Application.Top);

			Assert.True (label.AutoSize);
			Assert.Equal (new Rect (0, 0, 2, 10), label.Frame);

			var expected = @"
H X
e  
l  
l  
o  
   
   
   
   
   
Y  
";

			var pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 3, 11), pos);

			label.AutoSize = false;
			Application.Refresh ();

			Assert.False (label.AutoSize);
			Assert.Equal (new Rect (0, 0, 2, 10), label.Frame);

			expected = @"
H X
e  
l  
l  
o  
   
   
   
   
   
Y  
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 3, 11), pos);
		}

		[Fact]
		[AutoInitShutdown]
		public void Excess_Text_Is_Erased_When_The_Width_Is_Reduced ()
		{
			var lbl = new Label ("123");
			Application.Top.Add (lbl);
			Application.Begin (Application.Top);

			Assert.True (lbl.AutoSize);
			Assert.Equal ("123 ", GetContents ());

			lbl.Text = "12";
			// Here the AutoSize ensuring the right size with width 3 (Dim.Absolute)
			// that was set on the OnAdded method with the text length of 3
			// and height 1 because wasn't set and the text has 1 line
			Assert.Equal (new Rect (0, 0, 3, 1), lbl.Frame);
			Assert.Equal (new Rect (0, 0, 3, 1), lbl._needsDisplay);
			Assert.Equal (new Rect (0, 0, 0, 0), lbl.SuperView._needsDisplay);
			Assert.True (lbl.SuperView.LayoutNeeded);
			lbl.SuperView.Redraw (lbl.SuperView.Bounds);
			Assert.Equal ("12  ", GetContents ());

			string GetContents ()
			{
				var text = "";
				for (int i = 0; i < 4; i++) {
					text += (char)Application.Driver.Contents [0, i, 0];
				}
				return text;
			}
		}

		[Fact, AutoInitShutdown]
		public void Width_Height_SetMinWidthHeight_Narrow_Wide_Runes ()
		{
			var text = $"First line{Environment.NewLine}Second line";
			var horizontalView = new View () {
				Width = 20,
				Height = 1,
				Text = text
			};
			var verticalView = new View () {
				Y = 3,
				Height = 20,
				Width = 1,
				Text = text,
				TextDirection = TextDirection.TopBottom_LeftRight
			};
			var win = new Window () {
				Width = Dim.Fill (),
				Height = Dim.Fill (),
				Text = "Window"
			};
			win.Add (horizontalView, verticalView);
			Application.Top.Add (win);
			Application.Begin (Application.Top);
			((FakeDriver)Application.Driver).SetBufferSize (32, 32);

			Assert.False (horizontalView.AutoSize);
			Assert.False (verticalView.AutoSize);
			Assert.Equal (new Rect (0, 0, 20, 1), horizontalView.Frame);
			Assert.Equal (new Rect (0, 3, 1, 20), verticalView.Frame);
			var expected = @"
┌──────────────────────────────┐
│First line Second li          │
│                              │
│                              │
│F                             │
│i                             │
│r                             │
│s                             │
│t                             │
│                              │
│l                             │
│i                             │
│n                             │
│e                             │
│                              │
│S                             │
│e                             │
│c                             │
│o                             │
│n                             │
│d                             │
│                              │
│l                             │
│i                             │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
└──────────────────────────────┘
";

			var pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 32, 32), pos);

			verticalView.Text = $"最初の行{Environment.NewLine}二行目";
			Application.Top.Redraw (Application.Top.Bounds);
			Assert.Equal (new Rect (0, 3, 2, 20), verticalView.Frame);
			expected = @"
┌──────────────────────────────┐
│First line Second li          │
│                              │
│                              │
│最                            │
│初                            │
│の                            │
│行                            │
│                              │
│二                            │
│行                            │
│目                            │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
│                              │
└──────────────────────────────┘
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 32, 32), pos);
		}

		[Fact, AutoInitShutdown]
		public void TextDirection_Toggle ()
		{
			var win = new Window () { Width = Dim.Fill (), Height = Dim.Fill () };
			var view = new View ();
			win.Add (view);
			Application.Top.Add (win);

			Application.Begin (Application.Top);
			((FakeDriver)Application.Driver).SetBufferSize (22, 22);

			Assert.Equal (new Rect (0, 0, 22, 22), win.Frame);
			Assert.Equal (new Rect (0, 0, 22, 22), win.Margin.Frame);
			Assert.Equal (new Rect (0, 0, 22, 22), win.Border.Frame);
			Assert.Equal (new Rect (1, 1, 20, 20), win.Padding.Frame);
			Assert.False (view.AutoSize);
			Assert.Equal (TextDirection.LeftRight_TopBottom, view.TextDirection);
			Assert.Equal (Rect.Empty, view.Frame);
			Assert.Equal ("Absolute(0)", view.X.ToString ());
			Assert.Equal ("Absolute(0)", view.Y.ToString ());
			Assert.Equal ("Absolute(0)", view.Width.ToString ());
			Assert.Equal ("Absolute(0)", view.Height.ToString ());
			var expected = @"
┌────────────────────┐
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
└────────────────────┘
";

			var pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 22, 22), pos);

			view.Text = "Hello World";
			view.Width = 11;
			view.Height = 1;
			win.LayoutSubviews ();
			Application.Refresh ();

			Assert.Equal (new Rect (0, 0, 11, 1), view.Frame);
			Assert.Equal ("Absolute(0)", view.X.ToString ());
			Assert.Equal ("Absolute(0)", view.Y.ToString ());
			Assert.Equal ("Absolute(11)", view.Width.ToString ());
			Assert.Equal ("Absolute(1)", view.Height.ToString ());
			expected = @"
┌────────────────────┐
│Hello World         │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
└────────────────────┘
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 22, 22), pos);

			view.AutoSize = true;
			view.Text = "Hello Worlds";
			Application.Refresh ();

			Assert.Equal (new Rect (0, 0, 12, 1), view.Frame);
			Assert.Equal ("Absolute(0)", view.X.ToString ());
			Assert.Equal ("Absolute(0)", view.Y.ToString ());
			Assert.Equal ("Absolute(11)", view.Width.ToString ());
			Assert.Equal ("Absolute(1)", view.Height.ToString ());
			expected = @"
┌────────────────────┐
│Hello Worlds        │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
└────────────────────┘
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 22, 22), pos);

			view.TextDirection = TextDirection.TopBottom_LeftRight;
			Application.Refresh ();

			Assert.Equal (new Rect (0, 0, 11, 12), view.Frame);
			Assert.Equal ("Absolute(0)", view.X.ToString ());
			Assert.Equal ("Absolute(0)", view.Y.ToString ());
			Assert.Equal ("Absolute(11)", view.Width.ToString ());
			Assert.Equal ("Absolute(1)", view.Height.ToString ());
			expected = @"
┌────────────────────┐
│H                   │
│e                   │
│l                   │
│l                   │
│o                   │
│                    │
│W                   │
│o                   │
│r                   │
│l                   │
│d                   │
│s                   │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
└────────────────────┘
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 22, 22), pos);

			view.AutoSize = false;
			view.Height = 1;
			Application.Refresh ();

			Assert.Equal (new Rect (0, 0, 11, 1), view.Frame);
			Assert.Equal ("Absolute(0)", view.X.ToString ());
			Assert.Equal ("Absolute(0)", view.Y.ToString ());
			Assert.Equal ("Absolute(11)", view.Width.ToString ());
			Assert.Equal ("Absolute(1)", view.Height.ToString ());
			expected = @"
┌────────────────────┐
│HelloWorlds         │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
└────────────────────┘
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 22, 22), pos);

			view.PreserveTrailingSpaces = true;
			Application.Refresh ();

			Assert.Equal (new Rect (0, 0, 11, 1), view.Frame);
			Assert.Equal ("Absolute(0)", view.X.ToString ());
			Assert.Equal ("Absolute(0)", view.Y.ToString ());
			Assert.Equal ("Absolute(11)", view.Width.ToString ());
			Assert.Equal ("Absolute(1)", view.Height.ToString ());
			expected = @"
┌────────────────────┐
│Hello World         │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
└────────────────────┘
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 22, 22), pos);

			view.PreserveTrailingSpaces = false;
			var f = view.Frame;
			view.Width = f.Height;
			view.Height = f.Width;
			view.TextDirection = TextDirection.TopBottom_LeftRight;
			Application.Refresh ();

			Assert.Equal (new Rect (0, 0, 1, 11), view.Frame);
			Assert.Equal ("Absolute(0)", view.X.ToString ());
			Assert.Equal ("Absolute(0)", view.Y.ToString ());
			Assert.Equal ("Absolute(1)", view.Width.ToString ());
			Assert.Equal ("Absolute(11)", view.Height.ToString ());
			expected = @"
┌────────────────────┐
│H                   │
│e                   │
│l                   │
│l                   │
│o                   │
│                    │
│W                   │
│o                   │
│r                   │
│l                   │
│d                   │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
└────────────────────┘
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 22, 22), pos);

			view.AutoSize = true;
			Application.Refresh ();

			Assert.Equal (new Rect (0, 0, 1, 12), view.Frame);
			Assert.Equal ("Absolute(0)", view.X.ToString ());
			Assert.Equal ("Absolute(0)", view.Y.ToString ());
			Assert.Equal ("Absolute(1)", view.Width.ToString ());
			Assert.Equal ("Absolute(12)", view.Height.ToString ());
			expected = @"
┌────────────────────┐
│H                   │
│e                   │
│l                   │
│l                   │
│o                   │
│                    │
│W                   │
│o                   │
│r                   │
│l                   │
│d                   │
│s                   │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
└────────────────────┘
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 22, 22), pos);
		}

		[Fact, AutoInitShutdown]
		public void Width_Height_AutoSize_True_Stay_True_If_TextFormatter_Size_Fit ()
		{
			var text = $"Fi_nish 終";
			var horizontalView = new View () {
				Id = "horizontalView",
				AutoSize = true,
				HotKeySpecifier = '_',
				Text = text
			};
			var verticalView = new View () {
				Id = "verticalView",
				Y = 3,
				AutoSize = true,
				HotKeySpecifier = '_',
				Text = text,
				TextDirection = TextDirection.TopBottom_LeftRight
			};
			var win = new Window () {
				Id = "win",
				Width = Dim.Fill (),
				Height = Dim.Fill (),
				Text = "Window"
			};
			win.Add (horizontalView, verticalView);
			Application.Top.Add (win);
			Application.Begin (Application.Top);
			((FakeDriver)Application.Driver).SetBufferSize (22, 22);

			Assert.True (horizontalView.AutoSize);
			Assert.True (verticalView.AutoSize);
			Assert.Equal (new Size (10, 1), horizontalView.TextFormatter.Size);
			Assert.Equal (new Size (2, 9), verticalView.TextFormatter.Size);
			Assert.Equal (new Rect (0, 0, 9, 1), horizontalView.Frame);
			Assert.Equal ("Absolute(0)", horizontalView.X.ToString ());
			Assert.Equal ("Absolute(0)", horizontalView.Y.ToString ());
			// BUGBUG - v2 - With v1 AutoSize = true Width/Height should always grow or keep initial value, 
			// but in v2, autosize will be replaced by Dim.Fit. Disabling test for now.
			Assert.Equal ("Absolute(9)", horizontalView.Width.ToString ());
			Assert.Equal ("Absolute(1)", horizontalView.Height.ToString ());
			Assert.Equal (new Rect (0, 3, 2, 8), verticalView.Frame);
			Assert.Equal ("Absolute(0)", verticalView.X.ToString ());
			Assert.Equal ("Absolute(3)", verticalView.Y.ToString ());
			Assert.Equal ("Absolute(2)", verticalView.Width.ToString ());
			Assert.Equal ("Absolute(8)", verticalView.Height.ToString ());
			var expected = @"
┌────────────────────┐
│Finish 終           │
│                    │
│                    │
│F                   │
│i                   │
│n                   │
│i                   │
│s                   │
│h                   │
│                    │
│終                  │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
└────────────────────┘
";

			var pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 22, 22), pos);

			verticalView.Text = $"最初_の行二行目";
			Application.Top.Redraw (Application.Top.Bounds);
			Assert.True (horizontalView.AutoSize);
			Assert.True (verticalView.AutoSize);
			// height was initialized with 8 and can only grow or keep initial value
			Assert.Equal (new Rect (0, 3, 2, 8), verticalView.Frame);
			Assert.Equal ("Absolute(0)", verticalView.X.ToString ());
			Assert.Equal ("Absolute(3)", verticalView.Y.ToString ());
			Assert.Equal ("Absolute(2)", verticalView.Width.ToString ());
			Assert.Equal ("Absolute(8)", verticalView.Height.ToString ());
			expected = @"
┌────────────────────┐
│Finish 終           │
│                    │
│                    │
│最                  │
│初                  │
│の                  │
│行                  │
│二                  │
│行                  │
│目                  │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
│                    │
└────────────────────┘
";

			pos = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
			Assert.Equal (new Rect (0, 0, 22, 22), pos);
		}

		[Fact, AutoInitShutdown]
		public void AutoSize_Stays_True_Center_HotKeySpecifier ()
		{
			var btn = new Button () {
				X = Pos.Center (),
				Y = Pos.Center (),
				Text = "Say He_llo 你"
			};

			var win = new Window () {
				Width = Dim.Fill (),
				Height = Dim.Fill (),
				Title = "Test Demo 你"
			};
			win.Add (btn);
			Application.Top.Add (win);

			Assert.True (btn.AutoSize);

			Application.Begin (Application.Top);
			((FakeDriver)Application.Driver).SetBufferSize (30, 5);
			var expected = @"
┌┤Test Demo 你├──────────────┐
│                            │
│      [ Say Hello 你 ]      │
│                            │
└────────────────────────────┘
";

			TestHelpers.AssertDriverContentsWithFrameAre (expected, output);

			Assert.True (btn.AutoSize);
			btn.Text = "Say He_llo 你 changed";
			Assert.True (btn.AutoSize);
			Application.Refresh ();
			expected = @"
┌┤Test Demo 你├──────────────┐
│                            │
│  [ Say Hello 你 changed ]  │
│                            │
└────────────────────────────┘
";

			TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
		}

		[Fact, AutoInitShutdown]
		public void AutoSize_False_Equal_Before_And_After_IsInitialized_With_Differents_Orders ()
		{
			var view1 = new View () { Text = "Say Hello view1 你", AutoSize = false, Width = 10, Height = 5 };
			var view2 = new View () { Text = "Say Hello view2 你", Width = 10, Height = 5, AutoSize = false };
			var view3 = new View () { AutoSize = false, Width = 10, Height = 5, Text = "Say Hello view3 你" };
			var view4 = new View () {
				Text = "Say Hello view4 你",
				AutoSize = false,
				Width = 10,
				Height = 5,
				TextDirection = TextDirection.TopBottom_LeftRight
			};
			var view5 = new View () {
				Text = "Say Hello view5 你",
				Width = 10,
				Height = 5,
				AutoSize = false,
				TextDirection = TextDirection.TopBottom_LeftRight
			};
			var view6 = new View () {
				AutoSize = false,
				Width = 10,
				Height = 5,
				TextDirection = TextDirection.TopBottom_LeftRight,
				Text = "Say Hello view6 你",
			};
			Application.Top.Add (view1, view2, view3, view4, view5, view6);

			Assert.False (view1.IsInitialized);
			Assert.False (view2.IsInitialized);
			Assert.False (view3.IsInitialized);
			Assert.False (view4.IsInitialized);
			Assert.False (view5.IsInitialized);
			Assert.False (view1.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view1.Frame);
			Assert.Equal ("Absolute(10)", view1.Width.ToString ());
			Assert.Equal ("Absolute(5)", view1.Height.ToString ());
			Assert.False (view2.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view2.Frame);
			Assert.Equal ("Absolute(10)", view2.Width.ToString ());
			Assert.Equal ("Absolute(5)", view2.Height.ToString ());
			Assert.False (view3.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view3.Frame);
			Assert.Equal ("Absolute(10)", view3.Width.ToString ());
			Assert.Equal ("Absolute(5)", view3.Height.ToString ());
			Assert.False (view4.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view4.Frame);
			Assert.Equal ("Absolute(10)", view4.Width.ToString ());
			Assert.Equal ("Absolute(5)", view4.Height.ToString ());
			Assert.False (view5.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view5.Frame);
			Assert.Equal ("Absolute(10)", view5.Width.ToString ());
			Assert.Equal ("Absolute(5)", view5.Height.ToString ());
			Assert.False (view6.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view6.Frame);
			Assert.Equal ("Absolute(10)", view6.Width.ToString ());
			Assert.Equal ("Absolute(5)", view6.Height.ToString ());

			Application.Begin (Application.Top);

			Assert.True (view1.IsInitialized);
			Assert.True (view2.IsInitialized);
			Assert.True (view3.IsInitialized);
			Assert.True (view4.IsInitialized);
			Assert.True (view5.IsInitialized);
			Assert.False (view1.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view1.Frame);
			Assert.Equal ("Absolute(10)", view1.Width.ToString ());
			Assert.Equal ("Absolute(5)", view1.Height.ToString ());
			Assert.False (view2.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view2.Frame);
			Assert.Equal ("Absolute(10)", view2.Width.ToString ());
			Assert.Equal ("Absolute(5)", view2.Height.ToString ());
			Assert.False (view3.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view3.Frame);
			Assert.Equal ("Absolute(10)", view3.Width.ToString ());
			Assert.Equal ("Absolute(5)", view3.Height.ToString ());
			Assert.False (view4.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view4.Frame);
			Assert.Equal ("Absolute(10)", view4.Width.ToString ());
			Assert.Equal ("Absolute(5)", view4.Height.ToString ());
			Assert.False (view5.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view5.Frame);
			Assert.Equal ("Absolute(10)", view5.Width.ToString ());
			Assert.Equal ("Absolute(5)", view5.Height.ToString ());
			Assert.False (view6.AutoSize);
			Assert.Equal (new Rect (0, 0, 10, 5), view6.Frame);
			Assert.Equal ("Absolute(10)", view6.Width.ToString ());
			Assert.Equal ("Absolute(5)", view6.Height.ToString ());
		}

		[Fact, AutoInitShutdown]
		public void AutoSize_True_Equal_Before_And_After_IsInitialized_With_Different_Orders ()
		{
			var view1 = new View () { Text = "Say Hello view1 你", AutoSize = true, Width = 10, Height = 5 };
			var view2 = new View () { Text = "Say Hello view2 你", Width = 10, Height = 5, AutoSize = true };
			var view3 = new View () { AutoSize = true, Width = 10, Height = 5, Text = "Say Hello view3 你" };
			var view4 = new View () {
				Text = "Say Hello view4 你",
				AutoSize = true,
				Width = 10,
				Height = 5,
				TextDirection = TextDirection.TopBottom_LeftRight
			};
			var view5 = new View () {
				Text = "Say Hello view5 你",
				Width = 10,
				Height = 5,
				AutoSize = true,
				TextDirection = TextDirection.TopBottom_LeftRight
			};
			var view6 = new View () {
				AutoSize = true,
				Width = 10,
				Height = 5,
				TextDirection = TextDirection.TopBottom_LeftRight,
				Text = "Say Hello view6 你",
			};
			Application.Top.Add (view1, view2, view3, view4, view5, view6);

			Assert.False (view1.IsInitialized);
			Assert.False (view2.IsInitialized);
			Assert.False (view3.IsInitialized);
			Assert.False (view4.IsInitialized);
			Assert.False (view5.IsInitialized);
			Assert.True (view1.AutoSize);
			Assert.Equal (new Rect (0, 0, 18, 5), view1.Frame);
			Assert.Equal ("Absolute(10)", view1.Width.ToString ());
			Assert.Equal ("Absolute(5)", view1.Height.ToString ());
			Assert.True (view2.AutoSize);
			// BUGBUG: v2 - Autosize is broken when setting Width/Height AutoSize. Disabling test for now.
			//Assert.Equal (new Rect (0, 0, 18, 5), view2.Frame);
			//Assert.Equal ("Absolute(10)", view2.Width.ToString ());
			//Assert.Equal ("Absolute(5)", view2.Height.ToString ());
			//Assert.True (view3.AutoSize);
			//Assert.Equal (new Rect (0, 0, 18, 5), view3.Frame);
			//Assert.Equal ("Absolute(10)", view3.Width.ToString ());
			//Assert.Equal ("Absolute(5)", view3.Height.ToString ());
			//Assert.True (view4.AutoSize);
			//Assert.Equal (new Rect (0, 0, 10, 17), view4.Frame);
			//Assert.Equal ("Absolute(10)", view4.Width.ToString ());
			//Assert.Equal ("Absolute(5)", view4.Height.ToString ());
			//Assert.True (view5.AutoSize);
			//Assert.Equal (new Rect (0, 0, 10, 17), view5.Frame);
			//Assert.Equal ("Absolute(10)", view5.Width.ToString ());
			//Assert.Equal ("Absolute(5)", view5.Height.ToString ());
			//Assert.True (view6.AutoSize);
			//Assert.Equal (new Rect (0, 0, 10, 17), view6.Frame);
			//Assert.Equal ("Absolute(10)", view6.Width.ToString ());
			//Assert.Equal ("Absolute(5)", view6.Height.ToString ());

			Application.Begin (Application.Top);

			Assert.True (view1.IsInitialized);
			Assert.True (view2.IsInitialized);
			Assert.True (view3.IsInitialized);
			Assert.True (view4.IsInitialized);
			Assert.True (view5.IsInitialized);
			Assert.True (view1.AutoSize);
			Assert.Equal (new Rect (0, 0, 18, 5), view1.Frame);
			Assert.Equal ("Absolute(10)", view1.Width.ToString ());
			Assert.Equal ("Absolute(5)", view1.Height.ToString ());
			Assert.True (view2.AutoSize);
			// BUGBUG: v2 - Autosize is broken when setting Width/Height AutoSize. Disabling test for now.
			//Assert.Equal (new Rect (0, 0, 18, 5), view2.Frame);
			//Assert.Equal ("Absolute(10)", view2.Width.ToString ());
			//Assert.Equal ("Absolute(5)", view2.Height.ToString ());
			//Assert.True (view3.AutoSize);
			//Assert.Equal (new Rect (0, 0, 18, 5), view3.Frame);
			//Assert.Equal ("Absolute(10)", view3.Width.ToString ());
			//Assert.Equal ("Absolute(5)", view3.Height.ToString ());
			//Assert.True (view4.AutoSize);
			//Assert.Equal (new Rect (0, 0, 10, 17), view4.Frame);
			//Assert.Equal ("Absolute(10)", view4.Width.ToString ());
			//Assert.Equal ("Absolute(5)", view4.Height.ToString ());
			//Assert.True (view5.AutoSize);
			//Assert.Equal (new Rect (0, 0, 10, 17), view5.Frame);
			//Assert.Equal ("Absolute(10)", view5.Width.ToString ());
			//Assert.Equal ("Absolute(5)", view5.Height.ToString ());
			//Assert.True (view6.AutoSize);
			//Assert.Equal (new Rect (0, 0, 10, 17), view6.Frame);
			//Assert.Equal ("Absolute(10)", view6.Width.ToString ());
			//Assert.Equal ("Absolute(5)", view6.Height.ToString ());
		}

		[Fact, AutoInitShutdown]
		public void Setting_Frame_Dont_Respect_AutoSize_True_On_Layout_Absolute ()
		{
			var view1 = new View (new Rect (0, 0, 10, 0)) { Text = "Say Hello view1 你", AutoSize = true };
			var view2 = new View (new Rect (0, 0, 0, 10)) {
				Text = "Say Hello view2 你",
				AutoSize = true,
				TextDirection = TextDirection.TopBottom_LeftRight
			};
			Application.Top.Add (view1, view2);

			var rs = Application.Begin (Application.Top);

			Assert.True (view1.AutoSize);
			Assert.Equal (LayoutStyle.Absolute, view1.LayoutStyle);
			Assert.Equal (new Rect (0, 0, 18, 1), view1.Frame);
			Assert.Equal ("Absolute(0)", view1.X.ToString ());
			Assert.Equal ("Absolute(0)", view1.Y.ToString ());
			Assert.Equal ("Absolute(18)", view1.Width.ToString ());
			Assert.Equal ("Absolute(1)", view1.Height.ToString ());
			Assert.True (view2.AutoSize);
			// BUGBUG: v2 - Autosize is broken when setting Width/Height AutoSize. Disabling test for now.
			//Assert.Equal (LayoutStyle.Absolute, view2.LayoutStyle);
			//Assert.Equal (new Rect (0, 0, 2, 17), view2.Frame);
			//Assert.Equal ("Absolute(0)", view2.X.ToString ());
			//Assert.Equal ("Absolute(0)", view2.Y.ToString ());
			//Assert.Equal ("Absolute(2)", view2.Width.ToString ());
			//Assert.Equal ("Absolute(17)", view2.Height.ToString ());

			view1.Frame = new Rect (0, 0, 25, 4);
			bool firstIteration = false;
			Application.RunMainLoopIteration (ref rs, true, ref firstIteration);

			Assert.True (view1.AutoSize);
			Assert.Equal (LayoutStyle.Absolute, view1.LayoutStyle);
			Assert.Equal (new Rect (0, 0, 25, 4), view1.Frame);
			Assert.Equal ("Absolute(0)", view1.X.ToString ());
			Assert.Equal ("Absolute(0)", view1.Y.ToString ());
			Assert.Equal ("Absolute(18)", view1.Width.ToString ());
			Assert.Equal ("Absolute(1)", view1.Height.ToString ());

			view2.Frame = new Rect (0, 0, 1, 25);
			Application.RunMainLoopIteration (ref rs, true, ref firstIteration);

			Assert.True (view2.AutoSize);
			Assert.Equal (LayoutStyle.Absolute, view2.LayoutStyle);
			Assert.Equal (new Rect (0, 0, 1, 25), view2.Frame);
			Assert.Equal ("Absolute(0)", view2.X.ToString ());
			Assert.Equal ("Absolute(0)", view2.Y.ToString ());
			// BUGBUG: v2 - Autosize is broken when setting Width/Height AutoSize. Disabling test for now.
			//Assert.Equal ("Absolute(2)", view2.Width.ToString ());
			//Assert.Equal ("Absolute(17)", view2.Height.ToString ());
		}

		[Fact, AutoInitShutdown]
		public void Pos_Dim_Are_Null_If_Not_Initialized_On_Constructor_IsAdded_False ()
		{
			var top = Application.Top;
			var view1 = new View ();
			Assert.False (view1.IsAdded);
			Assert.Null (view1.X);
			Assert.Null (view1.Y);
			Assert.Null (view1.Width);
			Assert.Null (view1.Height);
			top.Add (view1);
			Assert.True (view1.IsAdded);
			Assert.Equal ("Absolute(0)", view1.X.ToString ());
			Assert.Equal ("Absolute(0)", view1.Y.ToString ());
			Assert.Equal ("Absolute(0)", view1.Width.ToString ());
			Assert.Equal ("Absolute(0)", view1.Height.ToString ());

			var view2 = new View () {
				X = Pos.Center (),
				Y = Pos.Center (),
				Width = Dim.Fill (),
				Height = Dim.Fill ()
			};
			Assert.False (view2.IsAdded);
			Assert.Equal ("Center", view2.X.ToString ());
			Assert.Equal ("Center", view2.Y.ToString ());
			Assert.Equal ("Fill(0)", view2.Width.ToString ());
			Assert.Equal ("Fill(0)", view2.Height.ToString ());
			top.Add (view2);
			Assert.True (view2.IsAdded);
			Assert.Equal ("Center", view2.X.ToString ());
			Assert.Equal ("Center", view2.Y.ToString ());
			Assert.Equal ("Fill(0)", view2.Width.ToString ());
			Assert.Equal ("Fill(0)", view2.Height.ToString ());
		}

		[Fact]
		public void SetRelativeLayout_PosCombine_Center_Plus_Absolute ()
		{
			var superView = new View () {
				AutoSize = false,
				Width = 10,
				Height = 10
			};

			var testView = new View () {
				AutoSize = false,
				X = Pos.Center (),
				Y = Pos.Center (),
				Width = 1,
				Height = 1
			};
			superView.Add (testView);
			testView.SetRelativeLayout (superView.Frame);
			Assert.Equal (4, testView.Frame.X);
			Assert.Equal (4, testView.Frame.Y);

			testView = new View () {
				AutoSize = false,
				X = Pos.Center () + 1,
				Y = Pos.Center () + 1,
				Width = 1,
				Height = 1
			};
			superView.Add (testView);
			testView.SetRelativeLayout (superView.Frame);
			Assert.Equal (5, testView.Frame.X);
			Assert.Equal (5, testView.Frame.Y);

			testView = new View () {
				AutoSize = false,
				X = 1 + Pos.Center (),
				Y = 1 + Pos.Center (),
				Width = 1,
				Height = 1
			};
			superView.Add (testView);
			testView.SetRelativeLayout (superView.Frame);
			Assert.Equal (5, testView.Frame.X);
			Assert.Equal (5, testView.Frame.Y);

			testView = new View () {
				AutoSize = false,
				X = 1 + Pos.Percent (50),
				Y = Pos.Percent (50) + 1,
				Width = 1,
				Height = 1
			};
			superView.Add (testView);
			testView.SetRelativeLayout (superView.Frame);
			Assert.Equal (6, testView.Frame.X);
			Assert.Equal (6, testView.Frame.Y);

			testView = new View () {
				AutoSize = false,
				X = Pos.Percent (10) + Pos.Percent (40),
				Y = Pos.Percent (10) + Pos.Percent (40),
				Width = 1,
				Height = 1
			};
			superView.Add (testView);
			testView.SetRelativeLayout (superView.Frame);
			Assert.Equal (5, testView.Frame.X);
			Assert.Equal (5, testView.Frame.Y);

			testView = new View () {
				AutoSize = false,
				X = 1 + Pos.Percent (10) + Pos.Percent (40) - 1,
				Y = 5 + Pos.Percent (10) + Pos.Percent (40) - 5,
				Width = 1,
				Height = 1
			};
			superView.Add (testView);
			testView.SetRelativeLayout (superView.Frame);
			Assert.Equal (5, testView.Frame.X);
			Assert.Equal (5, testView.Frame.Y);

			testView = new View () {
				AutoSize = false,
				X = Pos.Left (testView),
				Y = Pos.Left (testView),
				Width = 1,
				Height = 1
			};
			superView.Add (testView);
			testView.SetRelativeLayout (superView.Frame);
			Assert.Equal (5, testView.Frame.X);
			Assert.Equal (5, testView.Frame.Y);

			testView = new View () {
				AutoSize = false,
				X = 1 + Pos.Left (testView),
				Y = Pos.Top (testView) + 1,
				Width = 1,
				Height = 1
			};
			superView.Add (testView);
			testView.SetRelativeLayout (superView.Frame);
			Assert.Equal (6, testView.Frame.X);
			Assert.Equal (6, testView.Frame.Y);
		}


		[Theory, AutoInitShutdown]
		[InlineData (1)]
		[InlineData (2)]
		[InlineData (3)]
		[InlineData (4)]
		[InlineData (5)]
		[InlineData (6)]
		[InlineData (7)]
		[InlineData (8)]
		[InlineData (9)]
		[InlineData (10)]
		public void Dim_CenteredSubView_85_Percent_Height (int height)
		{
			var win = new Window () {
				Width = Dim.Fill (),
				Height = Dim.Fill ()
			};

			var subview = new Window () {
				X = Pos.Center (),
				Y = Pos.Center (),
				Width = Dim.Percent (85),
				Height = Dim.Percent (85)
			};

			win.Add (subview);

			var rs = Application.Begin (win);
			bool firstIteration = false;



			((FakeDriver)Application.Driver).SetBufferSize (20, height);
			Application.RunMainLoopIteration (ref rs, true, ref firstIteration);
			var expected = string.Empty;

			switch (height) {
			case 1:
				//Assert.Equal (new Rect (0, 0, 17, 0), subview.Frame);
				expected = @"
────────────────────";
				break;
			case 2:
				//Assert.Equal (new Rect (0, 0, 17, 1), subview.Frame);
				expected = @"
┌──────────────────┐
└──────────────────┘
";
				break;
			case 3:
				//Assert.Equal (new Rect (0, 0, 17, 2), subview.Frame);
				expected = @"
┌──────────────────┐
│                  │
└──────────────────┘
";
				break;
			case 4:
				//Assert.Equal (new Rect (0, 0, 17, 3), subview.Frame);
				expected = @"
┌──────────────────┐
│ ───────────────  │
│                  │
└──────────────────┘";
				break;
			case 5:
				//Assert.Equal (new Rect (0, 0, 17, 3), subview.Frame);
				expected = @"
┌──────────────────┐
│ ┌─────────────┐  │
│ └─────────────┘  │
│                  │
└──────────────────┘";
				break;
			case 6:
				//Assert.Equal (new Rect (0, 0, 17, 3), subview.Frame);
				expected = @"
┌──────────────────┐
│ ┌─────────────┐  │
│ │             │  │
│ └─────────────┘  │
│                  │
└──────────────────┘";
				break;
			case 7:
				//Assert.Equal (new Rect (0, 0, 17, 3), subview.Frame);
				expected = @"
┌──────────────────┐
│ ┌─────────────┐  │
│ │             │  │
│ │             │  │
│ └─────────────┘  │
│                  │
└──────────────────┘";
				break;
			case 8:
				//Assert.Equal (new Rect (0, 0, 17, 3), subview.Frame);
				expected = @"
┌──────────────────┐
│ ┌─────────────┐  │
│ │             │  │
│ │             │  │
│ │             │  │
│ └─────────────┘  │
│                  │
└──────────────────┘";
				break;
			case 9:
				//Assert.Equal (new Rect (0, 0, 17, 3), subview.Frame);
				expected = @"
┌──────────────────┐
│                  │
│ ┌─────────────┐  │
│ │             │  │
│ │             │  │
│ │             │  │
│ └─────────────┘  │
│                  │
└──────────────────┘";
				break;
			case 10:
				//Assert.Equal (new Rect (0, 0, 17, 3), subview.Frame);
				expected = @"
┌──────────────────┐
│                  │
│ ┌─────────────┐  │
│ │             │  │
│ │             │  │
│ │             │  │
│ │             │  │
│ └─────────────┘  │
│                  │
└──────────────────┘";
				break;
			}
			_ = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);

		}
		[Theory, AutoInitShutdown]
		[InlineData (1)]
		[InlineData (2)]
		[InlineData (3)]
		[InlineData (4)]
		[InlineData (5)]
		[InlineData (6)]
		[InlineData (7)]
		[InlineData (8)]
		[InlineData (9)]
		[InlineData (10)]
		public void Dim_CenteredSubView_85_Percent_Width (int width)
		{
			var win = new Window () {
				Width = Dim.Fill (),
				Height = Dim.Fill ()
			};

			var subview = new Window () {
				X = Pos.Center (),
				Y = Pos.Center (),
				Width = Dim.Percent (85),
				Height = Dim.Percent (85)
			};

			win.Add (subview);

			var rs = Application.Begin (win);
			bool firstIteration = false;



			((FakeDriver)Application.Driver).SetBufferSize (width, 7);
			Application.RunMainLoopIteration (ref rs, true, ref firstIteration);
			var expected = string.Empty;

			switch (width) {
			case 1:
				Assert.Equal (new Rect (0, 0, 0, 4), subview.Frame);
				expected = @"
│
│
│
│
│
│
│";
				break;
			case 2:
				Assert.Equal (new Rect (0, 0, 0, 4), subview.Frame);
				expected = @"
┌┐
││
││
││
││
││
└┘";
				break;
			case 3:
				Assert.Equal (new Rect (0, 0, 0, 4), subview.Frame);
				expected = @"
┌─┐
│ │
│ │
│ │
│ │
│ │
└─┘
";
				break;
			case 4:
				Assert.Equal (new Rect (0, 0, 1, 4), subview.Frame);
				expected = @"
┌──┐
││ │
││ │
││ │
││ │
│  │
└──┘";
				break;
			case 5:
				Assert.Equal (new Rect (0, 0, 2, 4), subview.Frame);
				expected = @"
┌───┐
│┌┐ │
│││ │
│││ │
│└┘ │
│   │
└───┘";
				break;
			case 6:
				Assert.Equal (new Rect (0, 0, 3, 4), subview.Frame);
				expected = @"
┌────┐
│┌─┐ │
││ │ │
││ │ │
│└─┘ │
│    │
└────┘";
				break;
			case 7:
				Assert.Equal (new Rect (0, 0, 4, 4), subview.Frame);
				expected = @"
┌─────┐
│┌──┐ │
││  │ │
││  │ │
│└──┘ │
│     │
└─────┘";
				break;
			case 8:
				Assert.Equal (new Rect (0, 0, 5, 4), subview.Frame);
				expected = @"
┌──────┐
│┌───┐ │
││   │ │
││   │ │
│└───┘ │
│      │
└──────┘";
				break;
			case 9:
				Assert.Equal (new Rect (1, 0, 5, 4), subview.Frame);
				expected = @"
┌───────┐
│ ┌───┐ │
│ │   │ │
│ │   │ │
│ └───┘ │
│       │
└───────┘";
				break;
			case 10:
				Assert.Equal (new Rect (1, 0, 6, 4), subview.Frame);
				expected = @"
┌────────┐
│ ┌────┐ │
│ │    │ │
│ │    │ │
│ └────┘ │
│        │
└────────┘";
				break;
			}
			_ = TestHelpers.AssertDriverContentsWithFrameAre (expected, output);
		}

		[Fact, AutoInitShutdown]
		public void PosCombine_DimCombine_View_With_SubViews ()
		{
			var clicked = false;
			var top = Application.Top;
			var win1 = new Window () { Id = "win1", Width = 20, Height = 10 };
			var btn = new Button ("ok");
			var win2 = new Window () { Id = "win2", Y = Pos.Bottom (btn) + 1, Width = 10, Height = 3 };
			var view1 = new View () { Id = "view1", Width = Dim.Fill (), Height = 1, CanFocus = true };
			view1.MouseClick += (sender, e) => clicked = true;
			var view2 = new View () { Id = "view2", Width = Dim.Fill (1), Height = 1, CanFocus = true };

			view1.Add (view2);
			win2.Add (view1);
			win1.Add (btn, win2);
			top.Add (win1);

			var rs = Application.Begin (top);

			TestHelpers.AssertDriverContentsWithFrameAre (@"
┌──────────────────┐
│[ ok ]            │
│                  │
│┌────────┐        │
││        │        │
│└────────┘        │
│                  │
│                  │
│                  │
└──────────────────┘", output);
			Assert.Equal (new Rect (0, 0, 80, 25), top.Frame);
			Assert.Equal (new Rect (0, 0, 6, 1), btn.Frame);
			Assert.Equal (new Rect (0, 0, 20, 10), win1.Frame);
			Assert.Equal (new Rect (0, 2, 10, 3), win2.Frame);
			Assert.Equal (new Rect (0, 0, 8, 1), view1.Frame);
			Assert.Equal (new Rect (0, 0, 7, 1), view2.Frame);
			var foundView = View.FindDeepestView (top, 9, 4, out int rx, out int ry);
			Assert.Equal (foundView, view1);
			ReflectionTools.InvokePrivate (
				typeof (Application),
				"ProcessMouseEvent",
				new MouseEvent () {
					X = 9,
					Y = 4,
					Flags = MouseFlags.Button1Clicked
				});
			Assert.True (clicked);

			Application.End (rs);
		}


		[Fact]
		public void Draw_Vertical_Throws_IndexOutOfRangeException_With_Negative_Bounds ()
		{
			Application.Init (new FakeDriver ());

			var top = Application.Top;

			var view = new View ("view") {
				Y = -2,
				Height = 10,
				TextDirection = TextDirection.TopBottom_LeftRight
			};
			top.Add (view);

			Application.Iteration += () => {
				Assert.Equal (-2, view.Y);

				Application.RequestStop ();
			};

			try {
				Application.Run ();
			} catch (IndexOutOfRangeException ex) {
				// After the fix this exception will not be caught.
				Assert.IsType<IndexOutOfRangeException> (ex);
			}

			// Shutdown must be called to safely clean up Application if Init has been called
			Application.Shutdown ();
		}

		[Fact]
		public void Draw_Throws_IndexOutOfRangeException_With_Negative_Bounds ()
		{
			Application.Init (new FakeDriver ());

			var top = Application.Top;

			var view = new View ("view") { X = -2 };
			top.Add (view);

			Application.Iteration += () => {
				Assert.Equal (-2, view.X);

				Application.RequestStop ();
			};

			try {
				Application.Run ();
			} catch (IndexOutOfRangeException ex) {
				// After the fix this exception will not be caught.
				Assert.IsType<IndexOutOfRangeException> (ex);
			}

			// Shutdown must be called to safely clean up Application if Init has been called
			Application.Shutdown ();
		}
	}
}