def test_equal_2(self): self.assertEqual(summary_ranges([1, 2, 3, 4]), ['1->4'])
def test_equal_1(self): self.assertEqual(summary_ranges([1, 1, 1, 1]), ['1'])
def test_equal_7(self): self.assertEqual(summary_ranges(None), [])
def test_equal_6(self): self.assertEqual(summary_ranges([]), [])
def test_equal_5(self): self.assertEqual(summary_ranges([0, 1, 2, 3, 3, 3, 4, 4, 5, 6, 7]), ['0->7'])
def test_equal_3(self): self.assertEqual(summary_ranges([0, 1, 2, 5, 6, 9]), ['0->2', '5->6', '9'])