def test_no_grid(self):
# arrange
arr_1 = []
arr_2 = [[]]
# act
result_1 = get_perimeter(arr_1)
result_2 = get_perimeter(arr_2)
# assert
self.assertEqual(0, result_1)
self.assertEqual(0, result_2)
def test_no_water(self):
# arrange
arr = [[1, 1, 1], [1, 1, 1], [1, 1, 1]]
# act
result = get_perimeter(arr)
# assert
self.assertEqual(12, result)
def test_one_row(self):
# arrange
arr = [[0, 0, 1, 1, 1, 0]]
# act
result = get_perimeter(arr)
# assert
self.assertEqual(8, result)
def test_one_column(self):
# arrange
arr = [[0], [1], [1]]
# act
result = get_perimeter(arr)
# assert
self.assertEqual(6, result)
def test_no_island(self):
# arrange
arr = [[0, 0], [0, 0], [0, 0]]
# act
result = get_perimeter(arr)
# assert
self.assertEqual(0, result)