def test_row_consistency_check(self):
"""
Check that _consistency_check() raises when number 2 has no valid
place in the fourth row.
"""
squares = np.array([
[2, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 3, 4, 5, 6, 7, 8, 9],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 2, 0, 0, 0, 0, 0, 0, 0],
])
board = HB6DBoard.from_array(squares)
# _num is 1, _row is 3, Nones are for 'no column'
_expected_idx = (0, 1, 1, 0, None, None)
with self.assertRaises(ConsistencyError) as exc_cm:
board._check_consistency()
self.assertEqual(exc_cm.exception._idx, _expected_idx)
def test_consistency_check_doesnt_mutate_board(self):
# Invalid board without candidates in the three empty squares
# Number 9 in square (1, 2) shouldn't be there (for example)
squares = np.array([
[4, 9, 3, None, 2, 1, 6, 5, 7], # noqa: E241
[None, 6, 7, 3, 4, 5, 8, 2, 1], # noqa: E241
[2, 5, 1, 8, 7, 6, 4, 9, 3], # noqa: E241
[5, 4, 8, 1, 3, 2, 9, 7, 6], # noqa: E241
[7, 2, 9, 5, 6, 4, 1, 3, 8], # noqa: E241
[1, 3, 6, 7, 9, 8, 2, 4, 5], # noqa: E241
[3, 7, 2, 6, 8, 9, 5, 1, 4], # noqa: E241
[8, 1, 4, 2, 5, 3, 7, 6, 9], # noqa: E241
[6, None, 5, 4, 1, 7, 3, 8, 2], # noqa: E241
])
board = HB6DBoard.from_array(squares)
repr_before = repr(board)
with self.assertRaises(ConsistencyError) as exc_cm:
board._check_consistency()
repr_after = repr(board)
self.assertIn("Inconsistency found", str(exc_cm.exception))
# Make sure the `_check_consistency()` method doesn't change the board
self.assertEqual(repr_after, repr_before)
def test_square_consistency_check(self):
"""
Check that _consistency_check() raises when there is no candidate
number in the top left square.
"""
squares = np.array([
[0, 2, 3, 4, 5, 6, 7, 8, 0],
[1, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[9, 0, 0, 0, 0, 0, 0, 0, 0],
])
board = HB6DBoard.from_array(squares)
# Nones are for 'no candidate', _row is 0, _col is 0
_expected_idx = (None, None, 0, 0, 0, 0)
with self.assertRaises(ConsistencyError) as exc_cm:
board._check_consistency()
self.assertEqual(exc_cm.exception._idx, _expected_idx)
def test_instantiation_from_array(self):
squares = np.array([
[7, None, None, None, None, None, None, None,
None], # noqa: E241, E501
[None, None, None, None, None, None, None, None,
None], # noqa: E241, E501
[None, None, None, None, None, None, None, None,
None], # noqa: E241, E501
[None, None, None, None, None, None, None, 7,
None], # noqa: E241, E501
[None, None, None, None, None, None, None, None,
None], # noqa: E241, E501
[None, 3, None, None, None, None, None, None,
None], # noqa: E241, E501
[None, None, None, None, None, None, 2, 1,
None], # noqa: E241, E501
[None, None, None, None, None, None, None, None,
None], # noqa: E241, E501
[None, None, None, None, None, None, None, None,
None], # noqa: E241, E501
])
expected_str = ("7 . . | . . . | . . .\n"
". . . | . . . | . . .\n"
". . . | . . . | . . .\n"
"---------------------\n"
". . . | . . . | . 7 .\n"
". . . | . . . | . . .\n"
". 3 . | . . . | . . .\n"
"---------------------\n"
". . . | . . . | 2 1 .\n"
". . . | . . . | . . .\n"
". . . | . . . | . . .\n")
board = HB6DBoard.from_array(squares)
self.assertEqual(str(board), expected_str)
def test_init(self):
HB6DBoard()