示例#1
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 def test_no_roots(self):
     self.assertIsNone(demo(15, 7, 15))
示例#2
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 def test_two_roots_2(self):
     self.assertEqual(demo(2, 5, 3), (-1.5, -1))
示例#3
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 def test_one_root2(self):
     self.assertEqual(demo(1, 0, 0), 0)
示例#4
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 def test_two_roots_1(self):
     self.assertEqual(demo(1, 0, -1), (-1, 1))