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# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
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, skip_if_empty
def pytest_generate_tests(metafunc):
names = metafunc.config.getoption("--backend")
selected_backends = select_backends(names, _available_backends())
if "backend" in metafunc.fixturenames:
filtered_backends = []
required = metafunc.function.requires_backend_interface
required_interfaces = [
mark.kwargs["interface"] for mark in required
]
for backend in selected_backends:
if all(
isinstance(backend, iface) for iface in required_interfaces
):
filtered_backends.append(backend)
# 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
skip_if_empty(filtered_backends, required_interfaces)
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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