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invocation.py
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invocation.py
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#!/usr/bin/env python
# coding: utf-8
import matchers
__copyright__ = "Copyright 2008-2010, Mockito Contributors"
__license__ = "MIT"
__maintainer__ = "Mockito Maintainers"
__email__ = "mockito-python@googlegroups.com"
class InvocationError(AssertionError):
pass
class Invocation(object):
def __init__(self, mock, method_name):
self.method_name = method_name
self.mock = mock
self.verified = False
self.verified_inorder = False
self.params = ()
self.named_params = {}
self.answers = []
self.strict = mock.strict
def _remember_params(self, params, named_params):
self.params = params
self.named_params = named_params
def __repr__(self):
return self.method_name + "(" + ", ".join([repr(p) for p in self.params]) + ")"
def answer_first(self):
return self.answers[0].answer()
class MatchingInvocation(Invocation):
@staticmethod
def compare(p1, p2):
if isinstance(p1, matchers.Matcher):
if not p1.matches(p2): return False
elif p1 != p2: return False
return True
def matches(self, invocation):
if self.method_name != invocation.method_name:
return False
if len(self.params) != len(invocation.params):
return False
if len(self.named_params) != len(invocation.named_params):
return False
if self.named_params.keys() != invocation.named_params.keys():
return False
for x, p1 in enumerate(self.params):
if not self.compare(p1, invocation.params[x]):
return False
for x, p1 in self.named_params.iteritems():
if not self.compare(p1, invocation.named_params[x]):
return False
return True
class RememberedInvocation(Invocation):
def __call__(self, *params, **named_params):
self._remember_params(params, named_params)
self.mock.remember(self)
for matching_invocation in self.mock.stubbed_invocations:
if matching_invocation.matches(self):
return matching_invocation.answer_first()
return None
class RememberedProxyInvocation(Invocation):
'''Remeber params and proxy to method of original object.
Calls method on original object and returns it's return value.
'''
def __call__(self, *params, **named_params):
self._remember_params(params, named_params)
self.mock.remember(self)
obj = self.mock.original_object
try:
method = getattr(obj, self.method_name)
except AttributeError:
raise AttributeError("You tried to call method '%s' which '%s' instance does not have." % (self.method_name, obj.__class__.__name__))
return method(*params, **named_params)
class VerifiableInvocation(MatchingInvocation):
def __call__(self, *params, **named_params):
self._remember_params(params, named_params)
matched_invocations = []
for invocation in self.mock.invocations:
if self.matches(invocation):
matched_invocations.append(invocation)
verification = self.mock.pull_verification()
verification.verify(self, len(matched_invocations))
for invocation in matched_invocations:
invocation.verified = True
class StubbedInvocation(MatchingInvocation):
def __init__(self, *params):
super(StubbedInvocation, self).__init__(*params)
if self.mock.strict:
self.ensure_mocked_object_has_method(self.method_name)
def ensure_mocked_object_has_method(self, method_name):
if not self.mock.has_method(method_name):
raise InvocationError("You tried to stub a method '%s' the object (%s) doesn't have."
% (method_name, self.mock.mocked_obj))
def __call__(self, *params, **named_params):
self._remember_params(params, named_params)
return AnswerSelector(self)
def stub_with(self, answer):
self.answers.append(answer)
self.mock.stub(self.method_name)
self.mock.finish_stubbing(self)
class AnswerSelector(object):
def __init__(self, invocation):
self.invocation = invocation
self.answer = None
def thenReturn(self, *return_values):
for return_value in return_values:
self.__then(Return(return_value))
return self
def thenRaise(self, *exceptions):
for exception in exceptions:
self.__then(Raise(exception))
return self
def __then(self, answer):
if not self.answer:
self.answer = CompositeAnswer(answer)
self.invocation.stub_with(self.answer)
else:
self.answer.add(answer)
return self
class CompositeAnswer(object):
def __init__(self, answer):
self.answers = [answer]
def add(self, answer):
self.answers.insert(0, answer)
def answer(self):
if len(self.answers) > 1:
a = self.answers.pop()
else:
a = self.answers[0]
return a.answer()
class Raise(object):
def __init__(self, exception):
self.exception = exception
def answer(self):
raise self.exception
class Return(object):
def __init__(self, return_value):
self.return_value = return_value
def answer(self):
return self.return_value