2250
2252
self.assertFalse(self.is_valid('{}'))
2251
2253
self.assertFalse(self.is_valid('{a}'))
2252
2254
self.assertFalse(self.is_valid('a\n'))
2254
2260
def assertSingleGroup(self, reference):
2255
2261
# the regexp is used with split and as such should match the reference