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Refactor parse_datetime and add unit test

This commit is contained in:
Philipp Hörist 2018-11-17 13:21:05 +01:00
parent 31e75823fd
commit 00c7715c01
2 changed files with 129 additions and 4 deletions
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36
gajim/common/modules/date_and_time.py
View File

@ -16,7 +16,10 @@
import re
import time
from datetime import datetime, timedelta, timezone, tzinfo
from datetime import datetime
from datetime import timedelta
from datetime import timezone
from datetime import tzinfo
PATTERN_DATETIME = re.compile(
@ -91,6 +94,10 @@ class LocalTimezone(tzinfo):
return tt.tm_isdst > 0
def create_tzinfo(hours=0, minutes=0):
return timezone(timedelta(hours=hours, minutes=minutes))
def parse_datetime(timestring, check_utc=False,
convert='utc', epoch=False):
'''
@ -133,11 +140,30 @@ def parse_datetime(timestring, check_utc=False,
except ValueError:
pass
else:
if not check_utc and convert == 'utc':
date_time = date_time.astimezone(timezone.utc)
if convert == 'local':
date_time = date_time.astimezone(LocalTimezone())
if check_utc:
if convert != 'utc':
raise ValueError(
'check_utc can only be used with convert="utc"')
date_time.replace(tzinfo=timezone.utc)
if epoch:
return date_time.timestamp()
return date_time
if convert == 'utc':
date_time = date_time.astimezone(timezone.utc)
if epoch:
return date_time.timestamp()
return date_time
if epoch:
# epoch is always UTC, use convert='utc' or check_utc=True
raise ValueError(
'epoch not available while converting to local')
if convert == 'local':
date_time = date_time.astimezone(LocalTimezone())
return date_time
# convert=None
return date_time
return None

99
test/no_gui/unit/test_date_time.py Normal file
View File

@ -0,0 +1,99 @@
import unittest
from datetime import datetime
from datetime import timezone
from datetime import timedelta
from gajim.common.modules.date_and_time import parse_datetime
from gajim.common.modules.date_and_time import LocalTimezone
from gajim.common.modules.date_and_time import create_tzinfo
class TestDateTime(unittest.TestCase):
def test_convert_to_utc(self):
strings = {
# Valid UTC strings and fractions
'2017-11-05T01:41:20Z': 1509846080.0,
'2017-11-05T01:41:20.123Z': 1509846080.123,
'2017-11-05T01:41:20.123123123+00:00': 1509846080.123123,
'2017-11-05T01:41:20.123123123123123-00:00': 1509846080.123123,
# Invalid strings
'2017-11-05T01:41:20Z+05:00': None,
'2017-11-05T01:41:20+0000': None,
'2017-11-05T01:41:20-0000': None,
# Valid strings with offset
'2017-11-05T01:41:20-05:00': 1509864080.0,
'2017-11-05T01:41:20+05:00': 1509828080.0,
}
strings2 = {
# Valid strings with offset
'2017-11-05T01:41:20-05:00': datetime(2017, 11, 5, 1, 41, 20, 0, create_tzinfo(hours=-5)),
'2017-11-05T01:41:20+05:00': datetime(2017, 11, 5, 1, 41, 20, 0, create_tzinfo(hours=5)),
}
for time_string, expected_value in strings.items():
result = parse_datetime(time_string, convert='utc', epoch=True)
self.assertEqual(result, expected_value)
for time_string, expected_value in strings2.items():
result = parse_datetime(time_string, convert='utc')
self.assertEqual(result, expected_value.astimezone(timezone.utc))
def test_convert_to_local(self):
strings = {
# Valid UTC strings and fractions
'2017-11-05T01:41:20Z': datetime(2017, 11, 5, 1, 41, 20, 0, timezone.utc),
'2017-11-05T01:41:20.123Z': datetime(2017, 11, 5, 1, 41, 20, 123000, timezone.utc),
'2017-11-05T01:41:20.123123123+00:00': datetime(2017, 11, 5, 1, 41, 20, 123123, timezone.utc),
'2017-11-05T01:41:20.123123123123123-00:00': datetime(2017, 11, 5, 1, 41, 20, 123123, timezone.utc),
# Valid strings with offset
'2017-11-05T01:41:20-05:00': datetime(2017, 11, 5, 1, 41, 20, 0, create_tzinfo(hours=-5)),
'2017-11-05T01:41:20+05:00': datetime(2017, 11, 5, 1, 41, 20, 0, create_tzinfo(hours=5)),
}
for time_string, expected_value in strings.items():
result = parse_datetime(time_string, convert='local')
self.assertEqual(result, expected_value.astimezone(LocalTimezone()))
def test_no_convert(self):
strings = {
# Valid UTC strings and fractions
'2017-11-05T01:41:20Z': timedelta(0),
'2017-11-05T01:41:20.123Z': timedelta(0),
'2017-11-05T01:41:20.123123123+00:00': timedelta(0),
'2017-11-05T01:41:20.123123123123123-00:00': timedelta(0),
# Valid strings with offset
'2017-11-05T01:41:20-05:00': timedelta(hours=-5),
'2017-11-05T01:41:20+05:00': timedelta(hours=5),
}
for time_string, expected_value in strings.items():
result = parse_datetime(time_string, convert=None)
self.assertEqual(result.utcoffset(), expected_value)
def test_check_utc(self):
strings = {
# Valid UTC strings and fractions
'2017-11-05T01:41:20Z': 1509846080.0,
'2017-11-05T01:41:20.123Z': 1509846080.123,
'2017-11-05T01:41:20.123123123+00:00': 1509846080.123123,
'2017-11-05T01:41:20.123123123123123-00:00': 1509846080.123123,
# Valid strings with offset
'2017-11-05T01:41:20-05:00': None,
'2017-11-05T01:41:20+05:00': None,
}
for time_string, expected_value in strings.items():
result = parse_datetime(
time_string, check_utc=True, epoch=True)
self.assertEqual(result, expected_value)