import re
import sys
from describe.matchers.core import MatcherBase, matcher_repository
STDOUT = sys.stdout
class TruthyMatcher(MatcherBase):
MESSAGE = 'be true'
METHODS = ['be_truthy']
def match(self, actual):
return bool(actual.evaluate())
matcher_repository.add(TruthyMatcher)
class FalsyMatcher(MatcherBase):
MESSAGE = 'be false'
METHODS = ['be_falsy']
def match(self, actual):
return not bool(actual.evaluate())
matcher_repository.add(FalsyMatcher)
class NoneMatcher(MatcherBase):
MESSAGE = 'none'
METHODS = ['be_none']
def match(self, actual):
return self.expected_original_value is not self.UNSET
def to(self, end_value):
def verify_ending_value(old_value, new_value):
return new_value == end_value
message = ('from %d ' % self.expected_original_value if self.has_starting_value else '') + ' to %(new)r'
tracker = Tracker(self.obj, self.name, self.invoke, self.expect, message)
return self.add_starting_value_verifier(tracker.add_verifier(verify_ending_value))
class ToChangeMatcher(MatcherBase):
METHODS = ['change']
def __init__(self, value, invoke=False):
super(ToChangeMatcher, self).__init__(value)
self.invoke = False
def get_postfix_message(self, actual_value):
raise NotImplementedError()
def asserts(self, obj, attrname):
return Changes(obj.evaluate(), attrname, self.invoke, self._expect)
def __enter__(self):
raise TypeError('change needs additional methods to help verify (use by(change_amount) or to(final_value)')
def __exit__(self, type, value, exception):
pass
matcher_repository.add(ToChangeMatcher)
def add_matcher(cls, fn):
matcher_repository.add(fn)