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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):
- if "backend" in metafunc.fixturenames:
- names = metafunc.config.getoption("--backend")
- selected_backends = select_backends(names, _available_backends())
- 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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