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# (C) Copyright 2005-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
"""
Tests for the Datetime trait type.
"""
import datetime
import unittest
from traits.testing.optional_dependencies import requires_traitsui, traitsui
from traits.api import Datetime, HasStrictTraits, TraitError
#: Unix epoch
UNIX_EPOCH = datetime.datetime(1970, 1, 1, 0, 0)
#: Windows NT epoch
NT_EPOCH = datetime.datetime(1600, 1, 1, 0, 0)
class HasDatetimeTraits(HasStrictTraits):
#: Simple case - no default, no parameters, no metadata
simple_datetime = Datetime()
#: Datetime with default
epoch = Datetime(UNIX_EPOCH)
#: Datetime with default provided via keyword.
alternative_epoch = Datetime(default_value=NT_EPOCH)
#: None prohibited
none_prohibited = Datetime(allow_none=False)
#: None allowed
none_allowed = Datetime(allow_none=True)
class TestDatetime(unittest.TestCase):
def test_default(self):
obj = HasDatetimeTraits()
self.assertEqual(obj.simple_datetime, None)
self.assertEqual(obj.epoch, UNIX_EPOCH)
self.assertEqual(obj.alternative_epoch, NT_EPOCH)
def test_assign_datetime(self):
# By default, datetime instances are permitted.
test_datetime = datetime.datetime(1975, 2, 13)
obj = HasDatetimeTraits()
obj.simple_datetime = test_datetime
self.assertEqual(obj.simple_datetime, test_datetime)
def test_assign_non_datetime(self):
obj = HasDatetimeTraits()
with self.assertRaises(TraitError) as exception_context:
obj.simple_datetime = "2021-02-05 12:00:00"
message = str(exception_context.exception)
self.assertIn("must be a datetime or None, but", message)
def test_assign_date(self):
obj = HasDatetimeTraits()
with self.assertRaises(TraitError) as exception_context:
obj.simple_datetime = datetime.date(1975, 2, 13)
message = str(exception_context.exception)
self.assertIn("must be a datetime or None, but", message)
self.assertIsNone(obj.simple_datetime)
def test_assign_none_with_allow_none_not_given(self):
obj = HasDatetimeTraits(simple_datetime=UNIX_EPOCH)
self.assertIsNotNone(obj.simple_datetime)
with self.assertWarns(DeprecationWarning) as warnings_cm:
obj.simple_datetime = None
self.assertIsNone(obj.simple_datetime)
_, _, this_module = __name__.rpartition(".")
self.assertIn(this_module, warnings_cm.filename)
self.assertIn(
"None will no longer be accepted",
str(warnings_cm.warning),
)
def test_assign_none_with_allow_none_false(self):
obj = HasDatetimeTraits(none_prohibited=UNIX_EPOCH)
with self.assertRaises(TraitError) as exception_context:
obj.none_prohibited = None
message = str(exception_context.exception)
self.assertIn("must be a datetime, but", message)
def test_assign_none_with_allow_none_true(self):
obj = HasDatetimeTraits(none_allowed=UNIX_EPOCH)
self.assertIsNotNone(obj.none_allowed)
obj.none_allowed = None
self.assertIsNone(obj.none_allowed)
@requires_traitsui
def test_get_editor(self):
obj = HasDatetimeTraits()
trait = obj.base_trait("epoch")
editor_factory = trait.get_editor()
self.assertIsInstance(editor_factory, traitsui.api.DatetimeEditor)
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