def tuple_count(self, stream, count, exact=True):
"""Test that a stream contains a number of tuples.
If `exact` is `True`, then condition becomes valid when `count`
tuples are seen on `stream` during the test. Subsequently if additional
tuples are seen on `stream` then the condition fails and can never
become valid.
If `exact` is `False`, then the condition becomes valid once `count`
tuples are seen on `stream` and remains valid regardless of
any additional tuples.
Args:
stream(Stream): Stream to be tested.
count(int): Number of tuples expected.
exact(bool): `True` if the stream must contain exactly `count`
tuples, `False` if the stream must contain at least `count` tuples.
Returns:
Stream: stream
"""
_logger.debug("Adding tuple count (%d) condition to stream %s.", count,
stream)
name = stream.name + '_count'
if exact:
cond = sttrt._TupleExactCount(count, name)
cond._desc = "{0} stream expects tuple count equal to {1}.".format(
stream.name, count)
else:
cond = sttrt._TupleAtLeastCount(count, name)
cond._desc = "'{0}' stream expects tuple count of at least {1}.".format(
stream.name, count)
return self.add_condition(stream, cond)
def tuple_count(self, stream, count, exact=True):
"""Test that a stream contains a number of tuples.
If `exact` is `True`, then condition becomes valid when `count`
tuples are seen on `stream` during the test. Subsequently if additional
tuples are seen on `stream` then the condition fails and can never
become valid.
If `exact` is `False`, then the condition becomes valid once `count`
tuples are seen on `stream` and remains valid regardless of
any additional tuples.
Args:
stream(Stream): Stream to be tested.
count(int): Number of tuples expected.
exact(bool): `True` if the stream must contain exactly `count`
tuples, `False` if the stream must contain at least `count` tuples.
Returns:
Stream: stream
"""
_logger.debug("Adding tuple count (%d) condition to stream %s.", count, stream)
if exact:
name = "ExactCount" + str(len(self._conditions))
cond = sttrt._TupleExactCount(count, name)
cond._desc = "{0} stream expects tuple count equal to {1}.".format(stream.name, count)
else:
name = "AtLeastCount" + str(len(self._conditions))
cond = sttrt._TupleAtLeastCount(count, name)
cond._desc = "'{0}' stream expects tuple count of at least {1}.".format(stream.name, count)
return self.add_condition(stream, cond)