def test_in_docker_docker_not_in_file():
non_docker_cgroup_example = b'''\
12:perf_event:/
11:hugetlb:/
10:devices:/
9:blkio:/
8:rdma:/
7:cpuset:/
6:cpu,cpuacct:/
5:freezer:/
4:memory:/
3:pids:/
2:net_cls,net_prio:/
1:name=systemd:/init.scope
0::/init.scope
'''
with _mock_open(non_docker_cgroup_example):
assert docker._is_in_docker() is False
def test_in_docker_docker_in_file():
docker_cgroup_example = b'''\
12:hugetlb:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
11:blkio:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
10:freezer:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
9:cpu,cpuacct:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
8:pids:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
7:rdma:/
6:net_cls,net_prio:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
5:cpuset:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
4:devices:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
3:memory:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
2:perf_event:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
1:name=systemd:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
0::/system.slice/containerd.service
''' # noqa: E501
with _mock_open(docker_cgroup_example):
assert docker._is_in_docker() is True
def test_in_docker_docker_not_in_file():
with _mock_open(NON_DOCKER_CGROUP_EXAMPLE):
assert docker._is_in_docker() is False
def test_in_docker_docker_in_file():
with _mock_open(DOCKER_CGROUP_EXAMPLE):
assert docker._is_in_docker() is True
def test_in_docker_no_file():
with mock.patch.object(builtins, 'open', side_effect=FileNotFoundError):
assert docker._is_in_docker() is False