def test_is_systemd_should_return_false_when_systemd_does_not_manage_current_process(self):
fileutil_read_file = fileutil.read_file
def mock_read_file(filepath, asbin=False, remove_bom=False, encoding='utf-8'):
if filepath == "/proc/cgroups":
return """
#subsys_name hierarchy num_cgroups enabled
cpuset 11 1 1
cpu 3 77 1
cpuacct 3 77 1
blkio 10 70 1
memory 12 124 1
devices 9 70 1
freezer 4 1 1
net_cls 2 1 1
perf_event 7 1 1
net_prio 2 1 1
hugetlb 8 1 1
pids 5 76 1
rdma 6 1 1
"""
if filepath == "/proc/self/cgroup":
return """
3:name=systemd:/
2:memory:/walinuxagent.service
1:cpu,cpuacct:/walinuxagent.service
"""
return fileutil_read_file(filepath, asbin=asbin, remove_bom=remove_bom, encoding=encoding)
with patch("azurelinuxagent.common.cgroupapi.fileutil.read_file", mock_read_file):
is_systemd = CGroupsApi._is_systemd()
self.assertFalse(is_systemd)
def test_is_systemd_should_return_false_when_systemd_does_not_manage_current_process(
self):
path_exists = os.path.exists
def mock_path_exists(path):
if path == "/run/systemd/system/":
mock_path_exists.path_tested = True
return False
return path_exists(path)
mock_path_exists.path_tested = False
with patch("azurelinuxagent.common.cgroupapi.os.path.exists",
mock_path_exists):
is_systemd = CGroupsApi._is_systemd()
self.assertFalse(is_systemd)
self.assertTrue(
mock_path_exists.path_tested,
'The expected path was not tested; the implementation of CGroupsApi._is_systemd() may have changed.'
)