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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!
import unittest
from traits.api import HasTraits, Int, List, Range, Str, TraitError, Tuple
class WithFloatRange(HasTraits):
r = Range(0.0, 100.0)
r_copied_on_change = Str
_changed_handler_calls = Int
def _r_changed(self, old, new):
self._changed_handler_calls += 1
self.r_copied_on_change = str(self.r)
if (self.r % 10) > 0:
self.r += 10 - (self.r % 10)
class WithLargeIntRange(HasTraits):
r = Range(0, 1000)
r_copied_on_change = Str
_changed_handler_calls = Int
def _r_changed(self, old, new):
self._changed_handler_calls += 1
self.r_copied_on_change = str(self.r)
if self.r > 100:
self.r = 0
class WithDynamicRange(HasTraits):
low = Int(0)
high = Int(10)
value = Int(3)
r = Range(value="value", low="low", high="high", exclude_high=True)
def _r_changed(self, old, new):
self._changed_handler_calls += 1
class RangeTestCase(unittest.TestCase):
def test_non_ui_events(self):
obj = WithFloatRange()
obj._changed_handler_calls = 0
obj.r = 10
self.assertEqual(1, obj._changed_handler_calls)
obj._changed_handler_calls = 0
obj.r = 34.56
self.assertEqual(obj._changed_handler_calls, 2)
self.assertEqual(obj.r, 40)
def test_non_ui_int_events(self):
# Even though the range is configured for 0..1000, the handler resets
# the value to 0 when it exceeds 100.
obj = WithLargeIntRange()
obj._changed_handler_calls = 0
obj.r = 10
self.assertEqual(obj._changed_handler_calls, 1)
self.assertEqual(obj.r, 10)
obj.r = 100
self.assertEqual(obj._changed_handler_calls, 2)
self.assertEqual(obj.r, 100)
obj.r = 101
self.assertEqual(obj._changed_handler_calls, 4)
self.assertEqual(obj.r, 0)
def test_dynamic_events(self):
obj = WithDynamicRange()
obj._changed_handler_calls = 0
obj.r = 5
self.assertEqual(obj._changed_handler_calls, 1)
self.assertEqual(obj.r, 5)
with self.assertRaises(TraitError):
obj.r = obj.high
self.assertEqual(obj.r, 5)
def test_dynamic_range_in_tuple(self):
# Regression test for #1391
class HasRangeInTuple(HasTraits):
low = Int()
high = Int()
hours_and_name = Tuple(Range(low="low", high="high"), Str)
model = HasRangeInTuple(low=0, high=48)
model.hours_and_name = (40, "fred")
self.assertEqual(model.hours_and_name, (40, "fred"))
with self.assertRaises(TraitError):
# First argument out or range; should raise.
model.hours_and_name = (50, "george")
def test_dynamic_range_in_list(self):
# Another regression test for #1391.
class HasRangeInList(HasTraits):
#: Valid digit range
low = Int()
high = Int()
#: Sequence of digits
digit_sequence = List(Range(low="low", high="high"))
model = HasRangeInList(low=-1, high=1)
model.digit_sequence = [-1, 0, 1, 1]
with self.assertRaises(TraitError):
model.digit_sequence = [-1, 0, 2, 1]
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