public void ShouldNot_IsAtTree(MapDay3 map)
 {
     map.Move();
     Assert.Throws <ArgumentOutOfRangeException>(() => map.IsAtTree());;
 }
        public void Should_IsAtTree(MapDay3 map, bool expectedIsOnTree)
        {
            var isOnTree = map.IsAtTree();

            Assert.Equal(expectedIsOnTree, isOnTree);
        }