def test_signal_usr1(self):
"""
When a client calls the ``/mlb_signal/usr1`` endpoint, the correct
response should be returned and the ``signalled_usr1`` flag set True.
"""
assert_that(self.marathon_lb.check_signalled_usr1(), Equals(False))
response = self.client.get('http://localhost/_mlb_signal/usr1')
assert_that(
response,
succeeded(
MatchesAll(
MatchesStructure(code=Equals(200),
headers=HasHeader('content-type',
['text/plain'])),
After(
methodcaller('text'),
succeeded(
Equals('Sent SIGUSR1 signal to marathon-lb'))))))
assert_that(self.marathon_lb.check_signalled_usr1(), Equals(True))
# Signalled flag should be reset to false after it is checked
assert_that(self.marathon_lb.check_signalled_usr1(), Equals(False))