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tests: Account for clock inaccuracies in all ClockObject tests

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Closes #998
This commit is contained in:
Daniel 2020-08-27 14:33:05 +02:00 committed by rdb
parent b655aa86c5
commit 0d2dddd988
1 changed files with 17 additions and 3 deletions
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20
tests/putil/test_clockobject.py
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@ -1,4 +1,18 @@
import time
import sys
# Epsilon for taking floating point calculation inaccuracies in mind
EPSILON = 1e-06
# We must account for clock inaccuracy
if sys.platform == 'win32' or sys.platform == 'cygwin':
# Assume 19 milliseconds inaccuracy on Windows (worst case)
# 16 milliseconds plus 3 milliseconds for execution time
CLOCK_INACCURACY = 0.019
else:
# On other platforms, assume 5 milliseconds, allowing for execution time
# (5000 times higher than their actual 1 microsecond accuracy)
CLOCK_INACCURACY = 0.005
def test_clock_get_frame_time(clockobj):
@ -16,13 +30,13 @@ def test_clock_jump_frame_time(clockobj):
def test_clock_get_real_time(clockobj):
current_time = clockobj.get_real_time()
time.sleep(0.4)
assert clockobj.get_real_time() - current_time >= 0.39
assert clockobj.get_real_time() - current_time + EPSILON >= 0.4 - CLOCK_INACCURACY
def test_clock_get_long_time(clockobj):
current_time = clockobj.get_long_time()
time.sleep(0.4)
assert clockobj.get_long_time() - current_time >= 0.39
assert clockobj.get_long_time() - current_time + EPSILON >= 0.4 - CLOCK_INACCURACY
def test_clock_get_dt(clockobj):
@ -37,4 +51,4 @@ def test_clock_reset(clockobj):
clockobj.reset()
assert clockobj.get_dt() == 0
assert clockobj.get_frame_time() == 0
assert clockobj.get_real_time() < 0.01
assert clockobj.get_real_time() - EPSILON <= CLOCK_INACCURACY