def test_measurements_to_json(self):
r = Registry()
with r.start({'common_tags': {'nf.app': 'app'}}):
c = r.counter('c')
c.increment()
r.gauge('g').set(42)
ms = r._get_measurements()
expected_counter = {
'op': 'sum',
'value': 1,
'tags': {
'nf.app': 'app',
'name': 'c',
'statistic': 'count'
}
}
expected_gauge = {
'op': 'max',
'value': 42,
'tags': {
'nf.app': 'app',
'name': 'g',
'statistic': 'gauge'
}
}
expected_entries = [expected_gauge, expected_counter]
payload = r._measurements_to_json(ms)
# sort payload so we ensure we get gauges first
entries = sorted(self.payload_to_entries(payload),
key=lambda m: m.get('op'))
self.assertEqual(expected_entries, entries)
def test_get_measurements_gauge_not_deleted_before_ttl(self):
clock = ManualClock()
r = Registry(clock=clock)
with r.start():
r.gauge('gauge').set(1)
ms = r._get_measurements()
self.assertEqual(1, len(ms))
# two cycles are required to delete a gauge after it expires
ms = r._get_measurements()
self.assertEqual(1, len(ms))
ms = r._get_measurements()
self.assertEqual(1, len(ms))
def test_get_measurements_only_useful(self):
r = Registry()
with r.start():
c = r.counter('counter')
g = r.gauge('gauge')
c.increment()
g.set(1)
ms = r._get_measurements()
self.assertEqual(2, len(ms))
r.gauge('nan').set(float('nan'))
r.counter('zero')
ms = r._get_measurements()
self.assertEqual(0, len(ms))
def test_get_measurements_only_useful(self):
r = Registry()
with r.start():
# meters with reference held
c = r.counter('counter')
g = r.gauge('gauge')
c.increment()
g.set(1)
ms = r._get_measurements()
self.assertEqual(2, len(ms))
# meters without reference held; only the non-nan gauge will report
r.gauge('gauge-nan').set(float('nan'))
r.counter('counter-zero')
ms = r._get_measurements()
self.assertEqual(1, len(ms))
def test_gauge_ttl_seconds(self):
r = Registry(
config=SidecarConfig({"sidecar.output-location": "memory"}))
g = r.gauge("test", ttl_seconds=120)
self.assertTrue(g._writer.is_empty())
g.set(42)
self.assertEqual("g,120:test:42", g._writer.last_line())
def test_duplicate_counter_different_type(self):
r = Registry()
g = r.gauge("check_value", tags=dict(taga="a"))
c = r.counter("check_value", tags=dict(taga="a"))
self.assertIsNot(g, c)
self.assertIs(c, r.noopCounter)
def test_duplicate_gauge_different_type(self):
r = Registry()
c = r.counter("check_value", tags=dict(taga="a"))
g = r.gauge("check_value", tags=dict(taga="a"))
self.assertIsNot(c, g)
self.assertIs(g, r.noopGauge)
