Adds AbsoluteLayout unit tests

UnitTests/Core/AbsoluteLayoutTests.cs

@@ -0,0 +1,328 @@
+using NStack;
+using System;
+using System.Collections.Generic;
+using System.Xml.Linq;
+using Terminal.Gui.Graphs;
+using Xunit;
+using Xunit.Abstractions;
+//using GraphViewTests = Terminal.Gui.Views.GraphViewTests;
+
+// Alias Console to MockConsole so we don't accidentally use Console
+using Console = Terminal.Gui.FakeConsole;
+
+namespace Terminal.Gui.CoreTests {
+	public class AbsoluteLayoutTests {
+		readonly ITestOutputHelper output;
+
+		public AbsoluteLayoutTests (ITestOutputHelper output)
+		{
+			this.output = output;
+		}
+
+		[Fact]
+		public void AbsoluteLayout_Constructor ()
+		{
+			var frame = new Rect (1, 2, 3, 4);
+			var v = new View (frame);
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+			Assert.Equal (frame, v.Frame);
+			Assert.Equal (new Rect(0, 0, frame.Width, frame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
+			Assert.Null (v.X);
+			Assert.Null (v.Y);
+			Assert.Null (v.Height);
+			Assert.Null (v.Width);
+
+			v = new View (frame, "v");
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+			Assert.Equal (frame, v.Frame);
+			Assert.Equal (new Rect (0, 0, frame.Width, frame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
+			Assert.Null (v.X);
+			Assert.Null (v.Y);
+			Assert.Null (v.Height);
+			Assert.Null (v.Width);
+
+			v = new View (frame.X, frame.Y, "v");
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+			// BUGBUG: v2 - I think the default size should be 0,0
+			Assert.Equal (new Rect(frame.X, frame.Y, 1, 1), v.Frame);
+			Assert.Equal (new Rect (0, 0, 1, 1), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
+			Assert.Null (v.X);
+			Assert.Null (v.Y);
+			Assert.Null (v.Height);
+			Assert.Null (v.Width);
+		}
+
+
+		[Fact]
+		public void AbsoluteLayout_Change_Frame ()
+		{
+			var frame = new Rect (1, 2, 3, 4);
+			var newFrame = new Rect (1, 2, 30, 40);
+
+			var v = new View (frame);
+			v.Frame = newFrame;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+			Assert.Equal (newFrame, v.Frame);
+			Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
+			Assert.Null (v.X);
+			Assert.Null (v.Y);
+			Assert.Null (v.Height);
+			Assert.Null (v.Width);
+
+			v = new View (frame.X, frame.Y, "v");
+			v.Frame = newFrame;
+			Assert.Equal (newFrame, v.Frame);
+			Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
+			Assert.Null (v.X);
+			Assert.Null (v.Y);
+			Assert.Null (v.Height);
+			Assert.Null (v.Width);
+
+			newFrame = new Rect (10, 20, 30, 40);
+			v = new View (frame);
+			v.Frame = newFrame;
+			Assert.Equal (newFrame, v.Frame);
+			Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
+			Assert.Null (v.X);
+			Assert.Null (v.Y);
+			Assert.Null (v.Height);
+			Assert.Null (v.Width);
+
+			v = new View (frame.X, frame.Y, "v");
+			v.Frame = newFrame;
+			Assert.Equal (newFrame, v.Frame);
+			Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
+			Assert.Null (v.X);
+			Assert.Null (v.Y);
+			Assert.Null (v.Height);
+			Assert.Null (v.Width);
+
+		}
+
+
+		[Fact]
+		public void AbsoluteLayout_Change_Height_or_Width_Absolute ()
+		{
+			var frame = new Rect (1, 2, 3, 4);
+			var newFrame = new Rect (1, 2, 30, 40);
+
+			var v = new View (frame);
+			v.Height = newFrame.Height;
+			v.Width = newFrame.Width;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+			Assert.Equal (newFrame, v.Frame);
+			Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
+			Assert.Null (v.X);
+			Assert.Null (v.Y);
+			Assert.Equal ($"Absolute({newFrame.Height})", v.Height.ToString());
+			Assert.Equal ($"Absolute({newFrame.Width})", v.Width.ToString ());
+		}
+
+		[Fact]
+		public void AbsoluteLayout_Change_Height_or_Width_NotAbsolute ()
+		{
+			var v = new View (Rect.Empty);
+			v.Height = Dim.Fill ();
+			v.Width = Dim.Fill ();
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);  // BUGBUG: v2 - Changing the Height or Width should change the LayoutStyle
+		}
+
+		[Fact]
+		public void AbsoluteLayout_Change_Height_or_Width_Null ()
+		{
+			var v = new View (Rect.Empty);
+			v.Height = null;
+			v.Width = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+		}
+
+		[Fact]
+		public void AbsoluteLayout_Change_X_or_Y_Absolute ()
+		{
+			var frame = new Rect (1, 2, 3, 4);
+			var newFrame = new Rect (10, 20, 3, 4);
+
+			var v = new View (frame);
+			v.X = newFrame.X;
+			v.Y = newFrame.Y;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+			Assert.Equal (newFrame, v.Frame);
+			Assert.Equal (new Rect (0, 0, newFrame.Width, newFrame.Height), v.Bounds); // With Absolute Bounds *is* deterministic before Layout
+			Assert.Equal ($"Absolute({newFrame.X})", v.X.ToString ());
+			Assert.Equal ($"Absolute({newFrame.Y})", v.Y.ToString ());
+			Assert.Null (v.Height);
+			Assert.Null (v.Width);
+		}
+
+		[Fact]
+		public void AbsoluteLayout_Change_X_or_Y_NotAbsolute ()
+		{
+			var v = new View (Rect.Empty);
+			v.X = Pos.Center ();
+			v.Y = Pos.Center ();
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // BUGBUG: v2 - Changing the Height or Width should change the LayoutStyle
+		}
+
+		[Fact]
+		public void AbsoluteLayout_Change_X_or_Y_Null ()
+		{
+			var v = new View (Rect.Empty);
+			v.X = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+
+			v = new View (Rect.Empty);
+			v.X = Pos.Center ();
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // BUGBUG: v2 - Changing the Height or Width should change the LayoutStyle
+
+			v.X = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+
+			v = new View (Rect.Empty);
+			v.Y = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+
+			v = new View (Rect.Empty);
+			v.Y = Pos.Center ();
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // BUGBUG: v2 - Changing the Height or Width should change the LayoutStyle
+
+			v.Y = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+		}
+
+		[Fact]
+		public void AbsoluteLayout_Change_X_Y_Height_Width_Absolute ()
+		{
+			var v = new View (Rect.Empty);
+			v.X = 1;
+			v.Y = 2;
+			v.Height = 3;
+			v.Width = 4;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+
+			v = new View (Rect.Empty);
+			v.X = Pos.Center ();
+			v.Y = Pos.Center ();
+			v.Width = Dim.Fill ();
+			v.Height = Dim.Fill ();
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // BUGBUG: v2 - Changing the Height or Width should change the LayoutStyle
+
+			// BUGBUG: v2 - If all of X, Y, Width, and Height are null or Absolute(n), isn't that the same as LayoutStyle.Absoulte?
+			v.X = null;
+			v.Y = null;
+			v.Height = null;
+			v.Width = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // We never automatically change to Absolute from Computed??
+
+			v = new View (Rect.Empty);
+			v.X = Pos.Center ();
+			v.Y = Pos.Center ();
+			v.Width = Dim.Fill ();
+			v.Height = Dim.Fill ();
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // BUGBUG: v2 - Changing the Height or Width should change the LayoutStyle
+
+			// BUGBUG: v2 - If all of X, Y, Width, and Height are null or Absolute(n), isn't that the same as LayoutStyle.Absoulte?
+			v.X = 1;
+			v.Y = null;
+			v.Height = null;
+			v.Width = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // We never automatically change to Absolute from Computed??
+
+			v = new View (Rect.Empty);
+			v.X = Pos.Center ();
+			v.Y = Pos.Center ();
+			v.Width = Dim.Fill ();
+			v.Height = Dim.Fill ();
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // BUGBUG: v2 - Changing the Height or Width should change the LayoutStyle
+
+			// BUGBUG: v2 - If all of X, Y, Width, and Height are null or Absolute(n), isn't that the same as LayoutStyle.Absoulte?
+			v.X = null;
+			v.Y = 2;
+			v.Height = null;
+			v.Width = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // We never automatically change to Absolute from Computed??
+
+			v = new View (Rect.Empty);
+			v.X = Pos.Center ();
+			v.Y = Pos.Center ();
+			v.Width = Dim.Fill ();
+			v.Height = Dim.Fill ();
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // BUGBUG: v2 - Changing the Height or Width should change the LayoutStyle
+
+			// BUGBUG: v2 - If all of X, Y, Width, and Height are null or Absolute(n), isn't that the same as LayoutStyle.Absoulte?
+			v.X = null;
+			v.Y = null;
+			v.Height = 3;
+			v.Width = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // We never automatically change to Absolute from Computed??
+
+			v = new View (Rect.Empty);
+			v.X = Pos.Center ();
+			v.Y = Pos.Center ();
+			v.Width = Dim.Fill ();
+			v.Height = Dim.Fill ();
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // BUGBUG: v2 - Changing the Height or Width should change the LayoutStyle
+
+			// BUGBUG: v2 - If all of X, Y, Width, and Height are null or Absolute(n), isn't that the same as LayoutStyle.Absoulte?
+			v.X = null;
+			v.Y = null;
+			v.Height = null;
+			v.Width = 4;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // We never automatically change to Absolute from Computed??
+		}
+
+		[Fact]
+		public void AbsoluteLayout_Change_X_Y_Height_Width_Null ()
+		{
+			var v = new View (Rect.Empty);
+			v.X = null;
+			v.Y = null;
+			v.Height = null;
+			v.Width = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute);
+
+			v = new View (Rect.Empty);
+			v.X = Pos.Center ();
+			v.Y = Pos.Center ();
+			v.Width = Dim.Fill ();
+			v.Height = Dim.Fill ();
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // BUGBUG: v2 - Changing the Height or Width should change the LayoutStyle
+
+			// BUGBUG: v2 - If all of X, Y, Width, and Height are null or Absolute(n), isn't that the same as LayoutStyle.Absoulte?
+			v.X = null;
+			v.Y = null;
+			v.Height = null;
+			v.Width = null;
+			Assert.True (v.LayoutStyle == LayoutStyle.Absolute); // We never automatically change to Absolute from Computed??
+		}
+
+		[Fact]
+		public void AbsoluteLayout_Layout ()
+		{
+			var superRect = new Rect (0, 0, 100, 100);
+			var super = new View (superRect, "super");
+			Assert.True (super.LayoutStyle == LayoutStyle.Absolute);
+			var v1 = new View () {
+				X = 0,
+				Y = 0,
+				Width = 10,
+				Height = 10
+			};
+			// BUGBUG: v2 - This should be LayoutStyle.Absolute
+			Assert.True (v1.LayoutStyle == LayoutStyle.Computed);
+
+			var v2 = new View () {
+				X = 10,
+				Y = 10,
+				Width = 10,
+				Height = 10
+			};
+			// BUGBUG: v2 - This should be LayoutStyle.Absolute
+			Assert.True (v1.LayoutStyle == LayoutStyle.Computed);
+
+			super.Add (v1, v2);
+			super.LayoutSubviews ();
+			Assert.Equal (new Rect (0, 0, 10, 10), v1.Frame);
+			Assert.Equal (new Rect (10, 10, 10, 10), v2.Frame);
+		}
+	}
+}