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Filename : test_docs.py
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# Copyright 2009-2018 Canonical Ltd.  All rights reserved.
#
# This file is part of wadllib
#
# wadllib is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# wadllib is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
# License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with wadllib.  If not, see <http://www.gnu.org/licenses/>.

"""Test harness."""

from __future__ import absolute_import, print_function

__metaclass__ = type
__all__ = [
    'load_tests',
    ]

import __future__
import atexit
import doctest
import os

import pkg_resources


DOCTEST_FLAGS = (
    doctest.ELLIPSIS |
    doctest.NORMALIZE_WHITESPACE |
    doctest.REPORT_NDIFF)


def load_tests(loader, tests, pattern):
    doctest_files = [
        os.path.abspath(
            pkg_resources.resource_filename('wadllib', 'README.txt'))]
    if pkg_resources.resource_exists('wadllib', 'docs'):
        for name in pkg_resources.resource_listdir('wadllib', 'docs'):
            if name.endswith('.txt'):
                doctest_files.append(
                    os.path.abspath(
                        pkg_resources.resource_filename(
                            'wadllib', 'docs/%s' % name)))
    globs = {
        future_item: getattr(__future__, future_item)
        for future_item in ('absolute_import', 'print_function')}
    kwargs = dict(
        module_relative=False, globs=globs, optionflags=DOCTEST_FLAGS)
    atexit.register(pkg_resources.cleanup_resources)
    tests.addTest(doctest.DocFileSuite(*doctest_files, **kwargs))
    return tests