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name : test_docs.py
 # Copyright 2009 Canonical Ltd.  All rights reserved.
#
# This file is part of lazr.restfulclient
#
# lazr.restfulclient 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.
#
# lazr.restfulclient 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 lazr.restfulclient.  If not, see <http://www.gnu.org/licenses/>.
"Test harness for doctests."

# pylint: disable-msg=E0611,W0142

__metaclass__ = type
__all__ = [
    "load_tests",
]

import atexit
import doctest
import os

import wsgi_intercept
from pkg_resources import (
    cleanup_resources,
    resource_exists,
    resource_filename,
    resource_listdir,
)
from wsgi_intercept.httplib2_intercept import install, uninstall

# We avoid importing anything from lazr.restful into the module level,
# so that standalone_tests() can run without any support from
# lazr.restful.

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


def setUp(test):
    from lazr.restful.example.base.tests.test_integration import WSGILayer

    install()
    wsgi_intercept.add_wsgi_intercept(
        "cookbooks.dev", 80, WSGILayer.make_application
    )


def tearDown(test):
    from zope.component import getUtility

    from lazr.restful.example.base.interfaces import IFileManager

    uninstall()
    file_manager = getUtility(IFileManager)
    file_manager.files = {}
    file_manager.counter = 0


def find_doctests(suffix, ignore_suffix=None):
    """Find doctests matching a certain suffix."""
    doctest_files = []
    # Match doctests against the suffix.
    if resource_exists("lazr.restfulclient", "docs"):
        for name in resource_listdir("lazr.restfulclient", "docs"):
            if ignore_suffix is not None and name.endswith(ignore_suffix):
                continue
            if name.endswith(suffix):
                doctest_files.append(
                    os.path.abspath(
                        resource_filename(
                            "lazr.restfulclient", "docs/%s" % name
                        )
                    )
                )
    return doctest_files


def load_tests(loader, tests, pattern):
    """Load all the doctests."""
    from lazr.restful.example.base.tests.test_integration import WSGILayer

    atexit.register(cleanup_resources)
    restful_suite = doctest.DocFileSuite(
        *find_doctests(".rst", ignore_suffix=".standalone.rst"),
        module_relative=False,
        optionflags=DOCTEST_FLAGS,
        setUp=setUp,
        tearDown=tearDown
    )
    restful_suite.layer = WSGILayer
    tests.addTest(restful_suite)
    tests.addTest(
        doctest.DocFileSuite(
            *find_doctests(".standalone.rst"),
            module_relative=False,
            optionflags=DOCTEST_FLAGS
        )
    )
    return tests
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