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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
try:
# Starting Python 3.8, importlib.metadata is available in the Python
# standard library and starting Python 3.10, the "select" interface is
# available on EntryPoints.
from importlib.metadata import entry_points
except ImportError:
from importlib_metadata import entry_points
import pyface.toolkit
class TestToolkit(unittest.TestCase):
def test_missing_import(self):
# test that we get an undefined object if no toolkit implementation
cls = pyface.toolkit.toolkit_object("tests:Missing")
with self.assertRaises(NotImplementedError):
cls()
def test_bad_import(self):
# test that we don't filter unrelated import errors
with self.assertRaises(ImportError):
pyface.toolkit.toolkit_object("tests.bad_import:Missing")
def test_core_plugins(self):
# test that we can see appropriate core entrypoints
# This compatibility layer can be removed when we drop support for
# Python < 3.10. Ref https://github.com/enthought/pyface/issues/999.
all_entry_points = entry_points()
if hasattr(all_entry_points, "select"):
plugins = {
ep.name
for ep in entry_points().select(group='pyface.toolkits')
}
else:
plugins = {
ep.name for ep in entry_points()['pyface.toolkits']
}
self.assertLessEqual({"qt4", "wx", "qt", "null"}, plugins)
def test_toolkit_object(self):
# test that the Toolkit class works as expected
# note that if this fails many other things will too
from pyface.tests.test_new_toolkit.init import toolkit_object
from pyface.tests.test_new_toolkit.widget import Widget as TestWidget
Widget = toolkit_object("widget:Widget")
self.assertEqual(Widget, TestWidget)
def test_toolkit_object_overriden(self):
# test that the Toolkit class search paths can be overridden
from pyface.tests.test_new_toolkit.widget import Widget as TestWidget
toolkit_object = pyface.toolkit.toolkit_object
old_packages = toolkit_object.packages
toolkit_object.packages = [
"pyface.tests.test_new_toolkit"
] + old_packages
try:
Widget = toolkit_object("widget:Widget")
self.assertEqual(Widget, TestWidget)
finally:
toolkit_object.packages = old_packages
def test_toolkit_object_not_overriden(self):
# test that the Toolkit class works when object not overridden
toolkit_object = pyface.toolkit.toolkit_object
TestWindow = toolkit_object("window:Window")
old_packages = toolkit_object.packages
toolkit_object.packages = [
"pyface.tests.test_new_toolkit"
] + old_packages
try:
Window = toolkit_object("window:Window")
self.assertEqual(Window, TestWindow)
finally:
toolkit_object.packages = old_packages
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