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# This file is part of cloud-init. See LICENSE file for license information.
import json
import os
import stat
from cloudinit import atomic_helper
from tests.unittests.helpers import CiTestCase
class TestAtomicHelper(CiTestCase):
def test_basic_usage(self):
"""write_file takes bytes if no omode."""
path = self.tmp_path("test_basic_usage")
contents = b"Hey there\n"
atomic_helper.write_file(path, contents)
self.check_file(path, contents)
def test_string(self):
"""write_file can take a string with mode w."""
path = self.tmp_path("test_string")
contents = "Hey there\n"
atomic_helper.write_file(path, contents, omode="w")
self.check_file(path, contents, omode="r")
def test_file_permissions(self):
"""write_file with mode 400 works correctly."""
path = self.tmp_path("test_file_permissions")
contents = b"test_file_perms"
atomic_helper.write_file(path, contents, mode=0o400)
self.check_file(path, contents, perms=0o400)
def test_write_json(self):
"""write_json output is readable json."""
path = self.tmp_path("test_write_json")
data = {"key1": "value1", "key2": ["i1", "i2"]}
atomic_helper.write_json(path, data)
with open(path, "r") as fp:
found = json.load(fp)
self.assertEqual(data, found)
self.check_perms(path, 0o644)
def check_file(self, path, content, omode=None, perms=0o644):
if omode is None:
omode = "rb"
self.assertTrue(os.path.exists(path))
self.assertTrue(os.path.isfile(path))
with open(path, omode) as fp:
found = fp.read()
self.assertEqual(content, found)
self.check_perms(path, perms)
def check_perms(self, path, perms):
file_stat = os.stat(path)
self.assertEqual(perms, stat.S_IMODE(file_stat.st_mode))
# vi: ts=4 expandtab
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