gui-cs.Terminal.Gui/UnitTests/KeyTests.cs

using System;
using Xunit;

namespace Terminal.Gui.Core {
	public class KeyTests {
		enum SimpleEnum { Zero, One, Two, Three, Four, Five }

		[Flags]
		enum FlaggedEnum { Zero, One, Two, Three, Four, Five }


		enum SimpleHighValueEnum { Zero, One, Two, Three, Four, Last = 0x40000000 }

		[Flags]
		enum FlaggedHighValueEnum { Zero, One, Two, Three, Four, Last = 0x40000000 }

		[Fact]
		public void SimpleEnum_And_FlagedEnum ()
		{
			var simple = SimpleEnum.Three | SimpleEnum.Five;

			// Nothing will not be well compared here.
			Assert.True (simple.HasFlag (SimpleEnum.Zero | SimpleEnum.Five));
			Assert.True (simple.HasFlag (SimpleEnum.One | SimpleEnum.Five));
			Assert.True (simple.HasFlag (SimpleEnum.Two | SimpleEnum.Five));
			Assert.True (simple.HasFlag (SimpleEnum.Three | SimpleEnum.Five));
			Assert.True (simple.HasFlag (SimpleEnum.Four | SimpleEnum.Five));
			Assert.True ((simple & (SimpleEnum.Zero | SimpleEnum.Five)) != 0);
			Assert.True ((simple & (SimpleEnum.One | SimpleEnum.Five)) != 0);
			Assert.True ((simple & (SimpleEnum.Two | SimpleEnum.Five)) != 0);
			Assert.True ((simple & (SimpleEnum.Three | SimpleEnum.Five)) != 0);
			Assert.True ((simple & (SimpleEnum.Four | SimpleEnum.Five)) != 0);
			Assert.Equal (7, (int)simple); // As it is not flagged only shows as number.
			Assert.Equal ("7", simple.ToString ());
			Assert.False (simple == (SimpleEnum.Zero | SimpleEnum.Five));
			Assert.False (simple == (SimpleEnum.One | SimpleEnum.Five));
			Assert.True (simple == (SimpleEnum.Two | SimpleEnum.Five));
			Assert.True (simple == (SimpleEnum.Three | SimpleEnum.Five));
			Assert.False (simple == (SimpleEnum.Four | SimpleEnum.Five));

			var flagged = FlaggedEnum.Three | FlaggedEnum.Five;

			// Nothing will not be well compared here.
			Assert.True (flagged.HasFlag (FlaggedEnum.Zero | FlaggedEnum.Five));
			Assert.True (flagged.HasFlag (FlaggedEnum.One | FlaggedEnum.Five));
			Assert.True (flagged.HasFlag (FlaggedEnum.Two | FlaggedEnum.Five));
			Assert.True (flagged.HasFlag (FlaggedEnum.Three | FlaggedEnum.Five));
			Assert.True (flagged.HasFlag (FlaggedEnum.Four | FlaggedEnum.Five));
			Assert.True ((flagged & (FlaggedEnum.Zero | FlaggedEnum.Five)) != 0);
			Assert.True ((flagged & (FlaggedEnum.One | FlaggedEnum.Five)) != 0);
			Assert.True ((flagged & (FlaggedEnum.Two | FlaggedEnum.Five)) != 0);
			Assert.True ((flagged & (FlaggedEnum.Three | FlaggedEnum.Five)) != 0);
			Assert.True ((flagged & (FlaggedEnum.Four | FlaggedEnum.Five)) != 0);
			Assert.Equal (FlaggedEnum.Two | FlaggedEnum.Five, flagged); // As it is flagged shows as bitwise.
			Assert.Equal ("Two, Five", flagged.ToString ());
			Assert.False (flagged == (FlaggedEnum.Zero | FlaggedEnum.Five));
			Assert.False (flagged == (FlaggedEnum.One | FlaggedEnum.Five));
			Assert.True (flagged == (FlaggedEnum.Two | FlaggedEnum.Five));
			Assert.True (flagged == (FlaggedEnum.Three | FlaggedEnum.Five));
			Assert.False (flagged == (FlaggedEnum.Four | FlaggedEnum.Five));
		}

		[Fact]
		public void SimpleHighValueEnum_And_FlaggedHighValueEnum ()
		{
			var simple = SimpleHighValueEnum.Three | SimpleHighValueEnum.Last;

			// This will not be well compared.
			Assert.True (simple.HasFlag (SimpleHighValueEnum.Zero | SimpleHighValueEnum.Last));
			Assert.True (simple.HasFlag (SimpleHighValueEnum.One | SimpleHighValueEnum.Last));
			Assert.True (simple.HasFlag (SimpleHighValueEnum.Two | SimpleHighValueEnum.Last));
			Assert.True (simple.HasFlag (SimpleHighValueEnum.Three | SimpleHighValueEnum.Last));
			Assert.False (simple.HasFlag (SimpleHighValueEnum.Four | SimpleHighValueEnum.Last));
			Assert.True ((simple & (SimpleHighValueEnum.Zero | SimpleHighValueEnum.Last)) != 0);
			Assert.True ((simple & (SimpleHighValueEnum.One | SimpleHighValueEnum.Last)) != 0);
			Assert.True ((simple & (SimpleHighValueEnum.Two | SimpleHighValueEnum.Last)) != 0);
			Assert.True ((simple & (SimpleHighValueEnum.Three | SimpleHighValueEnum.Last)) != 0);
			Assert.True ((simple & (SimpleHighValueEnum.Four | SimpleHighValueEnum.Last)) != 0);

			// This will be well compared, because the SimpleHighValueEnum.Last have a high value.
			Assert.Equal (1073741827, (int)simple); // As it is not flagged only shows as number.
			Assert.Equal ("1073741827", simple.ToString ()); // As it is not flagged only shows as number.
			Assert.False (simple == (SimpleHighValueEnum.Zero | SimpleHighValueEnum.Last));
			Assert.False (simple == (SimpleHighValueEnum.One | SimpleHighValueEnum.Last));
			Assert.False (simple == (SimpleHighValueEnum.Two | SimpleHighValueEnum.Last));
			Assert.True (simple == (SimpleHighValueEnum.Three | SimpleHighValueEnum.Last));
			Assert.False (simple == (SimpleHighValueEnum.Four | SimpleHighValueEnum.Last));

			var flagged = FlaggedHighValueEnum.Three | FlaggedHighValueEnum.Last;

			// This will not be well compared.
			Assert.True (flagged.HasFlag (FlaggedHighValueEnum.Zero | FlaggedHighValueEnum.Last));
			Assert.True (flagged.HasFlag (FlaggedHighValueEnum.One | FlaggedHighValueEnum.Last));
			Assert.True (flagged.HasFlag (FlaggedHighValueEnum.Two | FlaggedHighValueEnum.Last));
			Assert.True (flagged.HasFlag (FlaggedHighValueEnum.Three | FlaggedHighValueEnum.Last));
			Assert.False (flagged.HasFlag (FlaggedHighValueEnum.Four | FlaggedHighValueEnum.Last));
			Assert.True ((flagged & (FlaggedHighValueEnum.Zero | FlaggedHighValueEnum.Last)) != 0);
			Assert.True ((flagged & (FlaggedHighValueEnum.One | FlaggedHighValueEnum.Last)) != 0);
			Assert.True ((flagged & (FlaggedHighValueEnum.Two | FlaggedHighValueEnum.Last)) != 0);
			Assert.True ((flagged & (FlaggedHighValueEnum.Three | FlaggedHighValueEnum.Last)) != 0);
			Assert.True ((flagged & (FlaggedHighValueEnum.Four | FlaggedHighValueEnum.Last)) != 0);

			// This will be well compared, because the SimpleHighValueEnum.Last have a high value.
			Assert.Equal (FlaggedHighValueEnum.Three | FlaggedHighValueEnum.Last, flagged); // As it is flagged shows as bitwise.
			Assert.Equal ("Three, Last", flagged.ToString ()); // As it is flagged shows as bitwise.
			Assert.False (flagged == (FlaggedHighValueEnum.Zero | FlaggedHighValueEnum.Last));
			Assert.False (flagged == (FlaggedHighValueEnum.One | FlaggedHighValueEnum.Last));
			Assert.False (flagged == (FlaggedHighValueEnum.Two | FlaggedHighValueEnum.Last));
			Assert.True (flagged == (FlaggedHighValueEnum.Three | FlaggedHighValueEnum.Last));
			Assert.False (flagged == (FlaggedHighValueEnum.Four | FlaggedHighValueEnum.Last));
		}

		[Fact]
		public void Key_Enum_Ambiguity_Check ()
		{
			var key = Key.Y | Key.CtrlMask;

			// This will not be well compared.
			Assert.True (key.HasFlag (Key.Q | Key.CtrlMask));
			Assert.True ((key & (Key.Q | Key.CtrlMask)) != 0);
			Assert.Equal (Key.Y | Key.CtrlMask, key);
			Assert.Equal ("Y, CtrlMask", key.ToString ());

			// This will be well compared, because the Key.CtrlMask have a high value.
			Assert.False (key == (Key.Q | Key.CtrlMask));
			switch (key) {
			case Key.Q | Key.CtrlMask:
				// Never goes here.
				break;
			case Key.Y | Key.CtrlMask:
				Assert.True (key == (Key.Y | Key.CtrlMask));
				break;
			default:
				// Never goes here.
				break;
			}
		}

		[Fact]
		public void Key_ToString ()
		{
			var k = Key.Y | Key.CtrlMask;
			Assert.Equal ("Y, CtrlMask", k.ToString ());

			k = Key.CtrlMask | Key.Y;
			Assert.Equal ("Y, CtrlMask", k.ToString ());

			k = Key.Space;
			Assert.Equal ("Space", k.ToString ());

			k = Key.Space | Key.D;
			Assert.Equal ("d", k.ToString ());

			k = (Key)'d';
			Assert.Equal ("d", k.ToString ());

			k = Key.d;
			Assert.Equal ("d", k.ToString ());

			k = Key.D;
			Assert.Equal ("D", k.ToString ());

			// In a console this will always returns Key.D
			k = Key.D | Key.ShiftMask;
			Assert.Equal ("D, ShiftMask", k.ToString ());

			// In a console this will always returns Key.D
			k = Key.d | Key.ShiftMask;
			Assert.Equal ("d, ShiftMask", k.ToString ());
		}
	}
}