def test_FromSecondsObject(self):
from _testcapi import PyTime_FromSecondsObject
self.check_int_rounding(PyTime_FromSecondsObject,
lambda secs: secs * SEC_TO_NS)
self.check_float_rounding(
PyTime_FromSecondsObject,
lambda ns: self.decimal_round(ns * SEC_TO_NS))
# test nan
for time_rnd, _ in ROUNDING_MODES:
with self.assertRaises(ValueError):
PyTime_FromSecondsObject(float('nan'), time_rnd)
def test_FromSecondsObject(self):
from _testcapi import PyTime_FromSecondsObject
# Conversion giving the same result for all rounding methods
for rnd in ALL_ROUNDING_METHODS:
for obj, ts in (
# integers
(0, 0),
(1, SEC_TO_NS),
(-3, -3 * SEC_TO_NS),
# float: subseconds
(0.0, 0),
(1e-9, 1),
(1e-6, 10**3),
(1e-3, 10**6),
# float: seconds
(2.0, 2 * SEC_TO_NS),
(123.0, 123 * SEC_TO_NS),
(-7.0, -7 * SEC_TO_NS),
# nanosecond are kept for value <= 2^23 seconds
(2**22 - 1e-9, 4194303999999999),
(2**22, 4194304000000000),
(2**22 + 1e-9, 4194304000000001),
(2**23 - 1e-9, 8388607999999999),
(2**23, 8388608000000000),
# start losing precision for value > 2^23 seconds
(2**23 + 1e-9, 8388608000000002),
# nanoseconds are lost for value > 2^23 seconds
(2**24 - 1e-9, 16777215999999998),
(2**24, 16777216000000000),
(2**24 + 1e-9, 16777216000000000),
(2**25 - 1e-9, 33554432000000000),
(2**25, 33554432000000000),
(2**25 + 1e-9, 33554432000000000),
# close to 2^63 nanoseconds (_PyTime_t limit)
(9223372036, 9223372036 * SEC_TO_NS),
(9223372036.0, 9223372036 * SEC_TO_NS),
(-9223372036, -9223372036 * SEC_TO_NS),
(-9223372036.0, -9223372036 * SEC_TO_NS),
):
with self.subTest(obj=obj, round=rnd, timestamp=ts):
self.assertEqual(PyTime_FromSecondsObject(obj, rnd), ts)
with self.subTest(round=rnd):
with self.assertRaises(OverflowError):
PyTime_FromSecondsObject(9223372037, rnd)
PyTime_FromSecondsObject(9223372037.0, rnd)
PyTime_FromSecondsObject(-9223372037, rnd)
PyTime_FromSecondsObject(-9223372037.0, rnd)
# Conversion giving different results depending on the rounding method
FLOOR = _PyTime.ROUND_FLOOR
CEILING = _PyTime.ROUND_CEILING
for obj, ts, rnd in (
# close to zero
(1e-10, 0, FLOOR),
(1e-10, 1, CEILING),
(-1e-10, -1, FLOOR),
(-1e-10, 0, CEILING),
# test rounding of the last nanosecond
(1.1234567899, 1123456789, FLOOR),
(1.1234567899, 1123456790, CEILING),
(-1.1234567899, -1123456790, FLOOR),
(-1.1234567899, -1123456789, CEILING),
# close to 1 second
(0.9999999999, 999999999, FLOOR),
(0.9999999999, 1000000000, CEILING),
(-0.9999999999, -1000000000, FLOOR),
(-0.9999999999, -999999999, CEILING),
):
with self.subTest(obj=obj, round=rnd, timestamp=ts):
self.assertEqual(PyTime_FromSecondsObject(obj, rnd), ts)