/usr/lib/python2.7/dist-packages/traits/tests/test_array.py is in python-traits 4.6.0-1.
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# Copyright (c) 2005, 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!
#------------------------------------------------------------------------------
from __future__ import absolute_import
from traits.testing.unittest_tools import unittest
try:
import numpy
except ImportError:
numpy_available = False
else:
numpy_available = True
from ..api import Array, Bool, HasTraits
if numpy_available:
# Use of `Array` requires NumPy to be installed.
class Foo(HasTraits):
a = Array()
event_fired = Bool(False)
def _a_changed(self):
self.event_fired = True
class ArrayTestCase(unittest.TestCase):
""" Test cases for delegated traits. """
@unittest.skipUnless(numpy_available, "numpy not available")
def test_zero_to_one_element(self):
""" Test that an event fires when an Array trait changes from zero to
one element.
"""
f = Foo()
f.a = numpy.zeros((2,), float)
f.event_fired = False
# Change the array.
f.a = numpy.concatenate((f.a, numpy.array([100])))
# Confirm that the static trait handler was invoked.
self.assertEqual(f.event_fired, True)
return
#### EOF ######################################################################
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