def test_calc_speed():
# 128 bytes at 1 fps is 1184 bps
assert calc_speed(1, 128) == 1184
# adding a byte adds 8 bits
assert calc_speed(1, 129) == 8 + calc_speed(1, 128)
# multiplying fps multiplies the result
assert calc_speed(1000, 128) == 1000 * calc_speed(1, 128)
def test_check_max_speed():
# starting with 0 confidence should always return 0 confidence
assert check_max_speed(10000, 64, 1000**3, Confidence(0.0)).percent == 0.0
# no fps should have no effect on confidence
assert check_max_speed(0, 64, 1000**2, Confidence(99.0)).percent == 99.0
assert check_max_speed(0, 1000, 1000**2, Confidence(62.0)).percent == 62.0
# oversubscribed means no confidence
assert check_max_speed(1000, 1024, calc_speed(1000, 1024) - 1,
Confidence(100.0)).percent == 0.0
# undersubscribed means no change to confidence
assert check_max_speed(1000, 1024, calc_speed(1000, 1024) * 2,
Confidence(75.0)).percent == 75.0
def test_check_max_speed_reasons():
# starting with a reason should return that reason (maybe with additions)
assert "foo" in check_max_speed(1, 64, 1000**3,
Confidence(reason="foo")).reason
assert "foo" in check_max_speed(1000, 100, calc_speed(1000, 100)/2,
Confidence(reason="foo")).reason
# no fps should have no effect on reason
assert check_max_speed(0, 64, 1000**2,
Confidence(99.0, "foo")).reason == "foo"
assert check_max_speed(0, 1000, 1000**2,
Confidence(62.0, "foo")).reason == "foo"
# oversubscribed means no confidence and a reason
reason = check_max_speed(1000, 1024, calc_speed(1000, 1024) - 1,
Confidence()).reason
assert "rate" in reason
assert "max" in reason
# undersubscribed means no effect on reason
assert check_max_speed(1000, 1024, calc_speed(1000, 1024) * 2,
Confidence(75.0, "foo")).reason == "foo"
