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def test_chrono_system_clock():
from pybind11_tests import test_chrono1
import datetime
# Get the time from both c++ and datetime
date1 = test_chrono1()
date2 = datetime.datetime.today()
# The returned value should be a datetime
assert isinstance(date1, datetime.datetime)
# The numbers should vary by a very small amount (time it took to execute)
diff = abs(date1 - date2)
# There should never be a days/seconds difference
assert diff.days == 0
assert diff.seconds == 0
# We test that no more than about 0.5 seconds passes here
# This makes sure that the dates created are very close to the same
# but if the testing system is incredibly overloaded this should still pass
assert diff.microseconds < 500000
def test_chrono_system_clock_roundtrip():
from pybind11_tests import test_chrono2
import datetime
date1 = datetime.datetime.today()
# Roundtrip the time
date2 = test_chrono2(date1)
# The returned value should be a datetime
assert isinstance(date2, datetime.datetime)
# They should be identical (no information lost on roundtrip)
diff = abs(date1 - date2)
assert diff.days == 0
assert diff.seconds == 0
assert diff.microseconds == 0
def test_chrono_duration_roundtrip():
from pybind11_tests import test_chrono3
import datetime
# Get the difference between two times (a timedelta)
date1 = datetime.datetime.today()
date2 = datetime.datetime.today()
diff = date2 - date1
# Make sure this is a timedelta
assert isinstance(diff, datetime.timedelta)
cpp_diff = test_chrono3(diff)
assert cpp_diff.days == diff.days
assert cpp_diff.seconds == diff.seconds
assert cpp_diff.microseconds == diff.microseconds
def test_chrono_duration_subtraction_equivalence():
from pybind11_tests import test_chrono4
import datetime
date1 = datetime.datetime.today()
date2 = datetime.datetime.today()
diff = date2 - date1
cpp_diff = test_chrono4(date2, date1)
assert cpp_diff.days == diff.days
assert cpp_diff.seconds == diff.seconds
assert cpp_diff.microseconds == diff.microseconds
def test_chrono_steady_clock():
from pybind11_tests import test_chrono5
import datetime
time1 = test_chrono5()
time2 = test_chrono5()
assert isinstance(time1, datetime.timedelta)
assert isinstance(time2, datetime.timedelta)
def test_chrono_steady_clock_roundtrip():
from pybind11_tests import test_chrono6
import datetime
time1 = datetime.timedelta(days=10, seconds=10, microseconds=100)
time2 = test_chrono6(time1)
assert isinstance(time2, datetime.timedelta)
# They should be identical (no information lost on roundtrip)
assert time1.days == time2.days
assert time1.seconds == time2.seconds
assert time1.microseconds == time2.microseconds
def test_floating_point_duration():
from pybind11_tests import test_chrono7
import datetime
# Test using 35.525123 seconds as an example floating point number in seconds
time = test_chrono7(35.525123)
assert isinstance(time, datetime.timedelta)
assert time.seconds == 35
assert 525122 <= time.microseconds <= 525123
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