def test_empty_valid(self): result = is_valid_brackets('') self.assertTrue(result)
def test_valid_braces(self): result = is_valid_brackets('{}') self.assertTrue(result)
def test_invalid_unmatched(self): result = is_valid_brackets('[[})') self.assertFalse(result)
def test_invalid_unclosed(self): result = is_valid_brackets('[[') self.assertFalse(result)
def test_valid_combo(self): result = is_valid_brackets('[{}({})]') self.assertTrue(result)
def test_valid_parentheses(self): result = is_valid_brackets('()') self.assertTrue(result)
def test_valid_square(self): result = is_valid_brackets('[]') self.assertTrue(result)