Tests failing due to missing data file

从 tests/test_distro.py 和 tests/data/distro/os-release/ubuntu 下的 fixtures 开始。运行 TestDistro.test_distro_from_os_release_file 和 TestDistro.test_parse_os_release，以复现缺少文件导致的失败。当测试数据中存在 ubuntu-artful 所需的两个 JSON 文件，并且从源代码分发包运行时两个测试都通过，即表示完成。

When running the tests from the PyPI tarball, on openSUSE Tumbleweed, I get two failures looking for ubuntu-artful.txt-distro-expected.json in https://github.com/nexB/container-inspector/tree/main/tests/data/distro/os-release/ubuntu , but it doesnt exist.

This occurs irrespective of whether I add /etc/os-release from https://software.opensuse.org/package/openSUSE-release to the build VM.

[   32s] =================================== FAILURES ===================================
[   32s] _________________ TestDistro.test_distro_from_os_release_file __________________
[   32s] 
[   32s] self = <test_distro.TestDistro testMethod=test_distro_from_os_release_file>
[   32s] 
[   32s]     def test_distro_from_os_release_file(self):
[   32s]         test_dir = self.get_test_loc('distro/os-release')
[   32s]     
[   32s]         for test_file in resource_iter(test_dir, with_dirs=False):
[   32s]             if test_file.endswith('-expected.json'):
[   32s]                 continue
[   32s]             expected = test_file + '-distro-expected.json'
[   32s]             result = Distro.from_os_release_file(test_file).to_dict()
[   32s] >           check_expected(result, expected, regen=False)
[   32s] 
[   32s] tests/test_distro.py:41: 
[   32s] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
[   32s] 
[   32s] result = {'architecture': None, 'bug_report_url': 'https://bugs.launchpad.net/ubuntu/', 'build_id': None, 'cpe_name': None, ...}
[   32s] expected = '/home/abuild/rpmbuild/BUILD/container-inspector-32.0.1/tests/data/distro/os-release/ubuntu/ubuntu-artful.txt-distro-expected.json'
[   32s] regen = False
[   32s] 
[   32s]     def check_expected(result, expected, regen=False):
[   32s]         """
[   32s]         Check equality between a result collection and an expected JSON file.
[   32s]         Regen the expected file if regen is True.
[   32s]         """
[   32s]         if regen:
[   32s]             with open(expected, 'w') as ex:
[   32s]                 ex.write(json.dumps(result, indent=2))
[   32s]     
[   32s] >       with open(expected) as ex:
[   32s] E       FileNotFoundError: [Errno 2] No such file or directory: '/home/abuild/rpmbuild/BUILD/container-inspector-32.0.1/tests/data/distro/os-release/ubuntu/ubuntu-artful.txt-distro-expected.json'
[   32s] 
[   32s] tests/utilities.py:21: FileNotFoundError
[   32s] _______________________ TestDistro.test_parse_os_release _______________________
[   32s] 
[   32s] self = <test_distro.TestDistro testMethod=test_parse_os_release>
[   32s] 
[   32s]     def test_parse_os_release(self):
[   32s]         test_dir = self.get_test_loc('distro/os-release')
[   32s]     
[   32s]         for test_file in resource_iter(test_dir, with_dirs=False):
[   32s]             if test_file.endswith('expected.json'):
[   32s]                 continue
[   32s]             expected = test_file + '-expected.json'
[   32s]             result = parse_os_release(test_file)
[   32s] >           check_expected(result, expected, regen=False)
[   32s] 
[   32s] tests/test_distro.py:31: 
[   32s] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
[   32s] 
[   32s] result = {'BUG_REPORT_URL': 'https://bugs.launchpad.net/ubuntu/', 'HOME_URL': 'https://www.ubuntu.com/', 'ID': 'ubuntu', 'ID_LIKE': 'debian', ...}
[   32s] expected = '/home/abuild/rpmbuild/BUILD/container-inspector-32.0.1/tests/data/distro/os-release/ubuntu/ubuntu-artful.txt-expected.json'
[   32s] regen = False
[   32s] 
[   32s]     def check_expected(result, expected, regen=False):
[   32s]         """
[   32s]         Check equality between a result collection and an expected JSON file.
[   32s]         Regen the expected file if regen is True.
[   32s]         """
[   32s]         if regen:
[   32s]             with open(expected, 'w') as ex:
[   32s]                 ex.write(json.dumps(result, indent=2))
[   32s]     
[   32s] >       with open(expected) as ex:
[   32s] E       FileNotFoundError: [Errno 2] No such file or directory: '/home/abuild/rpmbuild/BUILD/container-inspector-32.0.1/tests/data/distro/os-release/ubuntu/ubuntu-artful.txt-expected.json'
[   32s] 
[   32s] tests/utilities.py:21: FileNotFoundError