def test_fractional_timer():
N = 10
def check_fraction(timer, ft):
# The running fraction should be approximately equal to the
# sum of last N "measurement" intervals over the sum of last
# 2N intervals (not 2N - 1 or 2N + 1)
actual = ft.running_fraction
expected = sum(timer.durations[1][-N:]) / (
sum(timer.durations[0][-N:] + timer.durations[1][-N:]))
assert actual == pytest.approx(expected)
timer = RandomTimer()
ft = FractionalTimer(n_samples=N, timer=timer)
for i in range(N):
ft.start_timing()
ft.stop_timing()
assert len(timer.timings) == N * 2
assert ft.running_fraction is None
ft.start_timing()
ft.stop_timing()
assert len(timer.timings) == (N + 1) * 2
assert ft.running_fraction is not None
check_fraction(timer, ft)
for i in range(N * 10):
ft.start_timing()
ft.stop_timing()
check_fraction(timer, ft)
def test_fractional_timer():
N = 10
def check_fraction(timer, ft):
# The running fraction should be approximately equal to the
# sum of last N "measurement" intervals over the sum of last
# 2N intervals (not 2N - 1 or 2N + 1)
actual = ft.running_fraction
expected = (sum(timer.durations[1][-N:]) /
(sum(timer.durations[0][-N:] + timer.durations[1][-N:])))
assert actual == pytest.approx(expected)
timer = RandomTimer()
ft = FractionalTimer(n_samples=N, timer=timer)
for i in range(N):
ft.start_timing()
ft.stop_timing()
assert len(timer.timings) == N * 2
assert ft.running_fraction is None
ft.start_timing()
ft.stop_timing()
assert len(timer.timings) == (N + 1) * 2
assert ft.running_fraction is not None
check_fraction(timer, ft)
for i in range(N * 10):
ft.start_timing()
ft.stop_timing()
check_fraction(timer, ft)