class IQN(str):
"""
A string subclass that validates values with the IQNValidator
"""
_validator = IQNValidator()
def __new__(mcls, value):
problem = mcls._validator(None, value)
if problem:
raise ValueError(problem)
return super().__new__(mcls, value)
def setUp(self):
self.validator = IQNValidator()
self.variable = None