def test_windowing(self):
TEN_SECONDS = Amount(10, Time.SECONDS).as_(Time.SECONDS)
clock = TestClock()
gauge = FakeGauge('test').supplies([100, 0, 50, 100, 150, 100, 50])
rate = Rate("foo", gauge, window = Amount(30, Time.SECONDS), clock=clock)
assert rate.read() == 0
clock.advance(TEN_SECONDS)
assert -100.0 / 10 == rate.read()
clock.advance(TEN_SECONDS)
assert -50.0 / 20 == rate.read()
clock.advance(TEN_SECONDS)
assert 0 == rate.read()
clock.advance(TEN_SECONDS)
assert 150.0 / 30 == rate.read()
clock.advance(TEN_SECONDS)
assert 50.0 / 30 == rate.read()
clock.advance(TEN_SECONDS)
assert -50.0 / 30 == rate.read()
def test_empty(self):
clock = TestClock()
gauge = FakeGauge('test').supplies([100000])
rate = Rate("foo", gauge, window = Amount(30, Time.SECONDS), clock=clock)
assert rate.read() == 0