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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 _optional_dependencies module """
import logging
import unittest
from pyface.util._optional_dependencies import optional_import
class TestOptionalImport(unittest.TestCase):
""" Test optional import context manager """
def test_optional_import(self):
# Test excusing dependency and the logging behaviour
logger = logging.getLogger(self.id())
with self.assertLogs(logger, level="DEBUG") as log_context:
with optional_import(
"random_missing_lib", "fail to import", logger):
# assume this library is not importable.
import random_missing_lib # noqa: F401
log, = log_context.output
self.assertIn("fail to import", log)
def test_optional_import_reraise(self):
# Test if the import error was about something else, reraise
logger = logging.getLogger(self.id())
with self.assertRaises(ImportError):
with optional_import("some_random_lib", "", logger):
import some_random_missing_lib # noqa: F401
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