import unittest

from spiral_matrix import spiral_matrix


# Tests adapted from `problem-specifications//canonical-data.json` @ v1.1.0


class SpiralMatrixTest(unittest.TestCase):
    def test_empty_spiral(self):
        self.assertEqual(spiral_matrix(0), [
        ])

    def test_trivial_spiral(self):
        self.assertEqual(spiral_matrix(1), [
            [1]
        ])

    def test_spiral_of_size_2(self):
        self.assertEqual(spiral_matrix(2), [
            [1, 2],
            [4, 3]
        ])

    def test_spiral_of_size_3(self):
        self.assertEqual(spiral_matrix(3), [
            [1, 2, 3],
            [8, 9, 4],
            [7, 6, 5]
        ])

    def test_spiral_of_size_4(self):
        self.assertEqual(spiral_matrix(4), [
            [1,  2,  3,  4],
            [12, 13, 14, 5],
            [11, 16, 15, 6],
            [10, 9,  8,  7]
        ])

    def test_spiral_of_size_5(self):
        self.assertEqual(spiral_matrix(5), [
            [1,  2,  3,  4,  5],
            [16, 17, 18, 19, 6],
            [15, 24, 25, 20, 7],
            [14, 23, 22, 21, 8],
            [13, 12, 11, 10, 9]
        ])


if __name__ == '__main__':
    unittest.main()