Add a DeferredMockCallable; like mock's MockCallable but allows awaiting

on method calls to be made later
This commit is contained in:
Paul "LeoNerd" Evans 2014-08-18 15:10:31 +01:00
parent e636e8799e
commit fcdc40a5dd
1 changed files with 41 additions and 0 deletions

View File

@ -280,3 +280,44 @@ class MemoryDataStore(object):
def get_presence_list(self, user_localpart, accepted):
return []
def _format_call(args, kwargs):
return ", ".join(
["%r" % (a) for a in args] +
["%s=%r" % (k, v) for k, v in kwargs.items()]
)
class DeferredMockCallable(object):
"""A callable instance that stores a set of pending call expectations and
return values for them. It allows a unit test to assert that the given set
of function calls are eventually made, by awaiting on them to be called.
"""
def __init__(self):
self.expectations = []
def __call__(self, *args, **kwargs):
if not self.expectations:
raise ValueError("%r has no pending calls to handle call(%s)" % (
self, _format_call(args, kwargs))
)
for (call, result, d) in self.expectations:
if args == call[1] and kwargs == call[2]:
d.callback(None)
return result
raise AssertionError("Was not expecting call(%s)" %
_format_call(args, kwargs)
)
def expect_call_and_return(self, call, result):
self.expectations.append((call, result, defer.Deferred()))
@defer.inlineCallbacks
def await_calls(self):
while self.expectations:
(_, _, d) = self.expectations.pop(0)
yield d