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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 Date trait type.
"""
import datetime
import unittest
from traits.testing.optional_dependencies import requires_traitsui, traitsui
from traits.api import Date, HasStrictTraits, TraitError
#: Unix epoch date.
UNIX_EPOCH = datetime.date(1970, 1, 1)
#: Windows NT epoch
NT_EPOCH = datetime.date(1600, 1, 1)
class HasDateTraits(HasStrictTraits):
#: Simple case - no default, no parameters, no metadata
simple_date = Date()
#: Date with default
epoch = Date(UNIX_EPOCH)
#: Date with default provided via keyword.
alternative_epoch = Date(default_value=NT_EPOCH)
#: Datetime instances prohibited
datetime_prohibited = Date(allow_datetime=False)
#: Datetime instances allowed
datetime_allowed = Date(allow_datetime=True)
#: None prohibited
none_prohibited = Date(allow_none=False)
#: None allowed
none_allowed = Date(allow_none=True)
#: Strictly a non-None non-datetime date
strict = Date(allow_datetime=False, allow_none=False)
class TestDate(unittest.TestCase):
def test_default(self):
obj = HasDateTraits()
self.assertEqual(obj.simple_date, None)
self.assertEqual(obj.epoch, UNIX_EPOCH)
self.assertEqual(obj.alternative_epoch, NT_EPOCH)
def test_assign_date(self):
test_date = datetime.date(1975, 2, 13)
obj = HasDateTraits()
obj.simple_date = test_date
self.assertEqual(obj.simple_date, test_date)
def test_assign_non_date(self):
obj = HasDateTraits()
with self.assertRaises(TraitError) as exception_context:
obj.simple_date = "1975-2-13"
message = str(exception_context.exception)
self.assertIn("must be a date or None, but", message)
def test_assign_none_with_allow_none_not_given(self):
obj = HasDateTraits(simple_date=UNIX_EPOCH)
self.assertIsNotNone(obj.simple_date)
with self.assertWarns(DeprecationWarning) as warnings_cm:
obj.simple_date = None
self.assertIsNone(obj.simple_date)
_, _, 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 = HasDateTraits(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 date, but", message)
def test_assign_none_with_allow_none_true(self):
obj = HasDateTraits(none_allowed=UNIX_EPOCH)
self.assertIsNotNone(obj.none_allowed)
obj.none_allowed = None
self.assertIsNone(obj.none_allowed)
def test_assign_datetime_with_allow_datetime_false(self):
test_datetime = datetime.datetime(1975, 2, 13)
obj = HasDateTraits()
with self.assertRaises(TraitError) as exception_context:
obj.datetime_prohibited = test_datetime
message = str(exception_context.exception)
self.assertIn("must be a non-datetime date or None, but", message)
def test_assign_datetime_with_allow_datetime_true(self):
test_datetime = datetime.datetime(1975, 2, 13)
obj = HasDateTraits()
obj.datetime_allowed = test_datetime
self.assertEqual(obj.datetime_allowed, test_datetime)
def test_assign_datetime_with_allow_datetime_not_given(self):
# For traits where "allow_datetime" is not specified, a
# DeprecationWarning should be issued on assignment of datetime.
test_datetime = datetime.datetime(1975, 2, 13)
obj = HasDateTraits()
with self.assertWarns(DeprecationWarning) as warnings_cm:
# Note: the warning depends on the type, not the value; this case
# should warn even though the time component of the datetime is
# zero.
obj.simple_date = test_datetime
self.assertEqual(obj.simple_date, test_datetime)
_, _, this_module = __name__.rpartition(".")
self.assertIn(this_module, warnings_cm.filename)
self.assertIn(
"datetime instances will no longer be accepted",
str(warnings_cm.warning),
)
def test_allow_none_false_allow_datetime_false(self):
obj = HasDateTraits(strict=UNIX_EPOCH)
with self.assertRaises(TraitError) as exception_context:
obj.strict = None
message = str(exception_context.exception)
self.assertIn("must be a non-datetime date, but", message)
@requires_traitsui
def test_get_editor(self):
obj = HasDateTraits()
trait = obj.base_trait("epoch")
editor_factory = trait.get_editor()
self.assertIsInstance(editor_factory, traitsui.api.DateEditor)
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