class MeterTests(TestCase):
def test_a_blankmeter(self):
self.meter = Meter("test")
self.assertEqual(self.meter.get_count(), 0)
self.assertAlmostEqual(self.meter.get_mean_rate(), 0.0)
def test_meter_with_three_events(self):
self.meter = Meter("test")
self.meter.mark(3)
self.assertEqual(self.meter.get_count(), 3)
@mock.patch("yunomi.core.meter.time")
def test_mean_rate_one_per_second(self, time_mock):
time_mock.return_value = 0.0
self.meter = Meter("test")
for i in xrange(10):
self.meter.mark()
time_mock.return_value += 1
self.meter._tick()
self.assertAlmostEqual(self.meter.get_mean_rate(), 1)
@mock.patch("yunomi.stats.ewma.time")
def test_meter_EWMA_rates(self, time_mock):
time_mock.return_value = 0.0
self.meter = Meter("test")
self.meter.mark(3)
time_mock.return_value += 5
for one, five, fifteen in [(0.6, 0.6, 0.6),
(0.22072766, 0.49123845, 0.56130419),
(0.08120117, 0.40219203, 0.52510399),
(0.02987224, 0.32928698, 0.49123845),
(0.01098938, 0.26959738, 0.45955700),
(0.00404277, 0.22072766, 0.42991879),
(0.00148725, 0.18071653, 0.40219203),
(0.00054713, 0.14795818, 0.37625345),
(0.00020128, 0.12113791, 0.35198773),
(0.00007405, 0.09917933, 0.32928698)]:
self.assertAlmostEqual(self.meter.get_one_minute_rate(), one)
self.assertAlmostEqual(self.meter.get_five_minute_rate(), five)
self.assertAlmostEqual(self.meter.get_fifteen_minute_rate(), fifteen)
time_mock.return_value += 60
class MeterTests(TestCase):
def test_a_blankmeter(self):
self.meter = Meter("test")
self.assertEqual(self.meter.get_count(), 0)
self.assertAlmostEqual(self.meter.get_mean_rate(), 0.0)
def test_meter_with_three_events(self):
self.meter = Meter("test")
self.meter.mark(3)
self.assertEqual(self.meter.get_count(), 3)
@mock.patch("yunomi.core.meter.time")
def test_mean_rate_one_per_second(self, time_mock):
time_mock.return_value = 0.0
self.meter = Meter("test")
for i in xrange(10):
self.meter.mark()
time_mock.return_value += 1
self.meter._tick()
self.assertAlmostEqual(self.meter.get_mean_rate(), 1)
@mock.patch("yunomi.stats.ewma.time")
def test_meter_EWMA_rates(self, time_mock):
time_mock.return_value = 0.0
self.meter = Meter("test")
self.meter.mark(3)
time_mock.return_value += 5
for one, five, fifteen in [(0.6, 0.6, 0.6),
(0.22072766, 0.49123845, 0.56130419),
(0.08120117, 0.40219203, 0.52510399),
(0.02987224, 0.32928698, 0.49123845),
(0.01098938, 0.26959738, 0.45955700),
(0.00404277, 0.22072766, 0.42991879),
(0.00148725, 0.18071653, 0.40219203),
(0.00054713, 0.14795818, 0.37625345),
(0.00020128, 0.12113791, 0.35198773),
(0.00007405, 0.09917933, 0.32928698)]:
self.assertAlmostEqual(self.meter.get_one_minute_rate(), one)
self.assertAlmostEqual(self.meter.get_five_minute_rate(), five)
self.assertAlmostEqual(self.meter.get_fifteen_minute_rate(),
fifteen)
time_mock.return_value += 60
class Timer(object):
"""
A timer metric which aggregates timing durations and provides duration
statistics, plus throughput statistics via L{Meter}.
"""
def __init__(self):
"""
Creates a new L{Timer} instance.
"""
self.histogram = Histogram.get_biased()
self.meter = Meter("calls")
def clear(self):
"""
Clears all recorded durations in the histogram.
"""
self.histogram.clear()
def update(self, duration):
"""
Updates the L{Histogram} and marks the L{Meter}.
@type duration: C{int}
@param duration: the duration of an event
"""
if duration >= 0:
self.histogram.update(duration)
self.meter.mark()
def get_count(self):
"""
L{Histogram.get_count}
"""
return self.histogram.get_count()
def get_fifteen_minute_rate(self):
"""
L{Meter.get_fifteen_minute_rate}
"""
return self.meter.get_fifteen_minute_rate()
def get_five_minute_rate(self):
"""
L{Meter.get_five_minute_rate}
"""
return self.meter.get_five_minute_rate()
def get_one_minute_rate(self):
"""
L{Meter.get_one_minute_rate}
"""
return self.meter.get_one_minute_rate()
def get_mean_rate(self):
"""
L{Meter.get_mean_rate}
"""
return self.meter.get_mean_rate()
def get_max(self):
"""
L{Histogram.get_max}
"""
return self.histogram.get_max()
def get_min(self):
"""
L{Histogram.get_min}
"""
return self.histogram.get_min()
def get_mean(self):
"""
L{Histogram.get_mean}
"""
return self.histogram.get_mean()
def get_std_dev(self):
"""
L{Histogram.get_std_dev}
"""
return self.histogram.get_std_dev()
def get_sum(self):
"""
L{Histogram.get_sum}
"""
return self.histogram.get_sum()
def get_snapshot(self):
"""
L{Histogram.get_snapshot}
"""
values = self.histogram.get_snapshot().get_values()
return Snapshot(values)
def get_event_type(self):
"""
L{Meter.get_event_type}
"""
return self.meter.get_event_type()