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"""Tests for the saddle-points exercise Implementation note: The saddle_points function must validate the input matrix and raise a ValueError with a meaningful error message if the matrix turns out to be irregular. """ import unittest from saddle_points import saddle_points # Tests adapted from `problem-specifications//canonical-data.json` @ v1.0.0 class SaddlePointTest(unittest.TestCase): def test_one_saddle(self): inp = [[9, 8, 7], [5, 3, 2], [6, 6, 7]] self.assertEqual(saddle_points(inp), set([(1, 0)])) def test_empty_matrix(self): self.assertEqual(saddle_points([]), set()) def test_no_saddle(self): inp = [[1, 2, 3], [3, 1, 2], [2, 3, 1]] self.assertEqual(saddle_points(inp), set()) def test_mult_saddle(self): inp = [[4, 5, 4], [3, 5, 5], [1, 5, 4]] ans = set([(0, 1), (1, 1), (2, 1)]) self.assertEqual(saddle_points(inp), ans) def test_indentify_saddle_bottom_right_corner(self): inp = [[8, 7, 9], [6, 7, 6], [3, 2, 5]] ans = set([(2, 2)]) self.assertEqual(saddle_points(inp), ans) # Additional tests for this track def test_irregular_matrix(self): inp = [[3, 2, 1], [0, 1], [2, 1, 0]] with self.assertRaisesWithMessage(ValueError): saddle_points(inp) # Utility functions def setUp(self): try: self.assertRaisesRegex except AttributeError: self.assertRaisesRegex = self.assertRaisesRegexp def assertRaisesWithMessage(self, exception): return self.assertRaisesRegex(exception, r".+") if __name__ == '__main__': unittest.main()
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12 entries across 12 versions & 1 rubygems