/usr/lib/python2.7/dist-packages/traits/tests/test_integer.py is in python-traits 4.6.0-1.
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#
# Copyright (c) 2013, Enthought, Inc.
# 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 Int trait type.
"""
from __future__ import absolute_import
import decimal
import sys
try:
import numpy
except ImportError:
numpy_available = False
else:
numpy_available = True
from traits.testing.unittest_tools import unittest
from ..api import HasTraits, Int, TraitError
class A(HasTraits):
integral = Int
class IntegerLike(object):
def __index__(self):
return 42
class Truncatable(object):
def __int__(self):
return 42
class TestInt(unittest.TestCase):
def test_default(self):
a = A()
self.assertEqual(a.integral, 0)
self.assertIs(type(a.integral), int)
def test_accepts_int(self):
a = A()
a.integral = 23
self.assertEqual(a.integral, 23)
self.assertIs(type(a.integral), int)
def test_accepts_small_long(self):
a = A()
a.integral = 23L
# Check that type is stored as int where possible.
self.assertEqual(a.integral, 23)
self.assertIs(type(a.integral), int)
def test_accepts_large_long(self):
a = A()
a.integral = long(sys.maxint)
self.assertEqual(a.integral, sys.maxint)
self.assertIs(type(a.integral), int)
a.integral = sys.maxint + 1
self.assertEqual(a.integral, sys.maxint + 1)
self.assertIs(type(a.integral), long)
def test_accepts_bool(self):
a = A()
a.integral = True
self.assertEqual(a.integral, 1)
self.assertIs(type(a.integral), int)
def test_respects_dunder_index(self):
a = A()
a.integral = IntegerLike()
self.assertEqual(a.integral, 42)
self.assertIs(type(a.integral), int)
def test_rejects_dunder_int(self):
a = A()
with self.assertRaises(TraitError):
a.integral = Truncatable()
def test_rejects_floating_point_types(self):
a = A()
with self.assertRaises(TraitError):
a.integral = 23.0
with self.assertRaises(TraitError):
a.integral = decimal.Decimal(23)
def test_rejects_string(self):
a = A()
with self.assertRaises(TraitError):
a.integral = "23"
@unittest.skipUnless(numpy_available, "numpy not available")
def test_numpy_types(self):
a = A()
a.integral = numpy.int32(23)
self.assertEqual(a.integral, 23)
self.assertIn(type(a.integral), (int, long))
a.integral = numpy.uint64(2**63 + 2)
self.assertEqual(a.integral, 2**63 + 2)
self.assertIs(type(a.integral), long)
with self.assertRaises(TraitError):
a.integral = numpy.float32(4.0)
with self.assertRaises(TraitError):
a.integral = numpy.float64(4.0)
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