Issue 6 Added Area -> Get and GetNeighbours methods and test

Tests/TwoDimension/AreaTests.cs

@@ -170,15 +170,36 @@ public void PositionSet()
 		[Test]
 		public void PositionGet()
 		{
-			// TODO: Issue 6 (https://github.com/Wizcorp/TileSystem/issues/6)
-			Assert.Fail();
-		}
+            // TODO: Issue 6 (https://github.com/Wizcorp/TileSystem/issues/6)
+            Area area = new Area();
+            var mockPosition = new Mock<IPosition2D>();
+
+            // Test Null
+            Assert.That(() => area.Get(null), Throws.ArgumentNullException);
+
+            /* 
+             * Test position type
+             * Method is assuming IPosition2D, can be used if another type can be expected
+             * Can also be used for Issue 13 (https://github.com/Wizcorp/TileSystem/issues/13)
+            */
+            //Assert.IsInstanceOf<IPosition2D>(mockPosition.Object);
+
+            // Test Get Position Works
+            Assert.That(() => area.Get(mockPosition.Object), Throws.Nothing);
+        }
 
 		[Test]
 		public void PositionGetNeighbours()
 		{
-			// TODO: Issue 6 (https://github.com/Wizcorp/TileSystem/issues/6)
-			Assert.Fail();
-		}
-	}
+            // TODO: Issue 6 (https://github.com/Wizcorp/TileSystem/issues/6)
+            Area area = new Area();
+            var mockTile = new Mock<ITile>();
+
+            // Test Null
+            Assert.That(() => area.GetNeighbours(null), Throws.ArgumentNullException);
+
+            // Test Get Neighbours Works
+            Assert.That(() => area.GetNeighbours(mockTile.Object), Throws.Nothing);
+        }
+    }
 }

TileSystem/Implementation/TwoDimension/Area.cs

@@ -1,6 +1,6 @@
 using System;
 using System.Collections.Generic;
-
+using System.Linq;
 using TileSystem.Interfaces.Base;
 using TileSystem.Interfaces.Management;
 using TileSystem.Interfaces.TwoDimension;
@@ -141,8 +141,14 @@ public virtual bool Remove(ITile tile)
 		/// <returns>Tile instance or null</returns>
 		public ITile Get(IPosition position)
 		{
-			// TODO: Issue 6 (https://github.com/Wizcorp/TileSystem/issues/6)
-			throw new NotImplementedException();
+            // TODO: Issue 6 (https://github.com/Wizcorp/TileSystem/issues/6)
+            //Assuming position is IPosition2D
+            var currentPosition = position as IPosition2D;
+
+            return tiles?//Using Linq to simplify null check, foreach loop could be used instead.
+                .FirstOrDefault(tile => 
+                (tile.Position as IPosition2D).X == currentPosition.X
+                && (tile.Position as IPosition2D).Y == currentPosition.Y);
 		}
 
 		/// <summary>
@@ -152,9 +158,30 @@ public ITile Get(IPosition position)
 		/// <returns>List of neighbours or null</returns>
 		public List<ITile> GetNeighbours(ITile tile)
 		{
-			// TODO: Issue 6 (https://github.com/Wizcorp/TileSystem/issues/6)
-			throw new NotImplementedException();
-		}
+            // TODO: Issue 6 (https://github.com/Wizcorp/TileSystem/issues/6)
+            List<ITile> result = new List<ITile>();
+
+            //Assuming position is IPosition2D
+            var currentTilePosition = tile.Position as IPosition2D;
+
+            var maxRow = currentTilePosition.Y + 1;
+            var minRow = currentTilePosition.Y - 1;
+
+            var maxColumn = currentTilePosition.X + 1;            
+            var minColumn = currentTilePosition.X - 1;
+
+            for (int row = minRow; row <= maxRow; row++)
+            {
+                for (int column = minColumn; column <= maxColumn; column++)
+                {
+                    if (row == currentTilePosition.Y && column == currentTilePosition.X)
+                        continue;
+
+                    result.Add(this.Get(new Position2D(column, row)));
+                }
+            }
+            return result.Any() ? result : null;
+        }
 
 		/// <summary>
 		/// Destroy this area and emit the event