Add contains room method

src/ManiaMap.Tests/TestDoorConnection.cs

@@ -53,5 +53,22 @@ public void TestGetConnectingRoom()
                 Assert.AreEqual(connection.GetConnectingRoom(new Uid(int.MaxValue)), new Uid(-1, -1, -1));
             }
         }
+
+        [TestMethod]
+        public void TestContainsRoom()
+        {
+            var results = Samples.BigLayoutSample.Generate(12345, Console.WriteLine);
+            Assert.IsTrue(results.Success);
+            var layout = results.GetOutput<Layout>("Layout");
+
+            foreach (var connection in layout.DoorConnections.Values)
+            {
+                var toRoom = connection.ToRoom;
+                var fromRoom = connection.FromRoom;
+                Assert.IsTrue(connection.ContainsRoom(toRoom));
+                Assert.IsTrue(connection.ContainsRoom(fromRoom));
+                Assert.IsFalse(connection.ContainsRoom(new Uid(-1, -1, -1)));
+            }
+        }
     }
 }

src/ManiaMap/DoorConnection.cs

@@ -111,5 +111,14 @@ public Uid GetConnectingRoom(Uid roomId)
                 return FromRoom;
             return new Uid(-1, -1, -1);
         }
+
+        /// <summary>
+        /// Returns true if the door connections "from room" or "to room" matches the specified room ID.
+        /// </summary>
+        /// <param name="roomId">The room ID.</param>
+        public bool ContainsRoom(Uid roomId)
+        {
+            return roomId == FromRoom || roomId == ToRoom;
+        }
     }
 }