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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import absolute_import, division, print_function
import pytest
from cryptography.hazmat.backends import _available_backends
from .utils import check_backend_support, select_backends
def pytest_generate_tests(metafunc):
names = metafunc.config.getoption("--backend")
selected_backends = select_backends(names, _available_backends())
if "backend" in metafunc.fixturenames:
filtered_backends = []
for backend in selected_backends:
try:
required = metafunc.function.requires_backend_interface
except AttributeError:
# function does not have requires_backend_interface decorator
filtered_backends.append(backend)
else:
required_interfaces = tuple(
mark.kwargs["interface"] for mark in required
)
if isinstance(backend, required_interfaces):
filtered_backends.append(backend)
if not filtered_backends:
# If you pass an empty list to parametrize Bad Things(tm) happen
# as of pytest 2.6.4 when the test also has a parametrize decorator
pytest.skip(
"No backends provided supply the interface: {0}".format(
", ".join(iface.__name__ for iface in required_interfaces)
)
)
else:
metafunc.parametrize("backend", filtered_backends)
@pytest.mark.trylast
def pytest_runtest_setup(item):
check_backend_support(item)
def pytest_addoption(parser):
parser.addoption(
"--backend", action="store", metavar="NAME",
help="Only run tests matching the backend NAME."
)
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