Merge pull request #665 from BDisp/pos-equals

Fixes #657 Pos implement Equals.

Terminal.Gui/Core/PosDim.cs

@@ -178,6 +178,11 @@ namespace Terminal.Gui {
 			{
 				return n;
 			}
+
+			public override int GetHashCode () => n.GetHashCode ();
+
+			public override bool Equals (object other) => other is PosAbsolute abs && abs.n == n;
+
 		}
 
 		/// <summary>

UnitTests/PosTests.cs

@@ -66,8 +66,7 @@ namespace Terminal.Gui {
 
 			var pos1 = Pos.At (n1);
 			var pos2 = Pos.At (n2);
-			// BUGBUG: Pos should implement equality and this should change to Equal
-			Assert.NotEqual (pos1, pos2);
+			Assert.Equal (pos1, pos2);
 		}
 
 		[Fact]