public void IsTrap()
{
//Its left and center tiles are traps, but its right tile is not.
Assert.IsTrue(_day18.IsTrap("^", "^", "."));
//Its center and right tiles are traps, but its left tile is not.
Assert.IsTrue(_day18.IsTrap(".", "^", "^"));
// Only its left tile is a trap.
Assert.IsTrue(_day18.IsTrap("^", ".", "."));
// Only its left tile is a trap.
Assert.IsTrue(_day18.IsTrap(".", ".", "^"));
Assert.IsFalse(_day18.IsTrap(".", ".", "."));
Assert.IsFalse(_day18.IsTrap(".", "^", "."));
Assert.IsFalse(_day18.IsTrap("^", "^", "^"));
}