def top_percentile(sample, nth):
"""Test that a given sample is in the top nth percentile.
Args:
sample (list of Measurement): sample of measurements
nth (number): percentage of the position in which the sample should fit
app (string): identifier of the application within the sample should be compared
use_case (string: identifier of the use case used to create the ranking
"""
position, total = Measurement.get_position_in_ranking(sample)
percentile_position = float(position) / total * 100
assert percentile_position <= nth,\
("Given sample is not on {:.1f}% top percentile "
"(Position: {:.1f}%)".format(
nth,
percentile_position
))
def test_get_energy_ranking(self):
sample = (create_random_sample(10, 1, app_pkg="com.app1") +
create_random_sample(11, 1, app_pkg="com.app2") +
create_random_sample(12, 1, app_pkg="com.app3") +
create_random_sample(13, 1, app_pkg="com.app4") +
create_random_sample(14, 1, app_pkg="com.app5") +
create_random_sample(15, 1, app_pkg="com.app6"))
for measurement in sample:
measurement.persist()
ranking = Measurement.get_energy_ranking()
self.assertEqual(list(ranking.keys()), [
"com.app1",
"com.app2",
"com.app3",
"com.app4",
"com.app5",
"com.app6",
])
compare_sample = create_random_sample(12.5, 0.5, app_pkg="com.app7")
self.assertEqual(Measurement.get_position_in_ranking(compare_sample),
(4, 6))