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import os
import stat
from unittest import TestCase
from mocker import MockerTestCase
from cloudinit import util
from cloudinit import importer
class FakeSelinux(object):
def __init__(self, match_what):
self.match_what = match_what
self.restored = []
def matchpathcon(self, path, mode): # pylint: disable=W0613
if path == self.match_what:
return
else:
raise OSError("No match!")
def is_selinux_enabled(self):
return True
def restorecon(self, path, recursive): # pylint: disable=W0613
self.restored.append(path)
class TestMergeDict(MockerTestCase):
def test_simple_merge(self):
"""Test simple non-conflict merge."""
source = {"key1": "value1"}
candidate = {"key2": "value2"}
result = util.mergedict(source, candidate)
self.assertEqual({"key1": "value1", "key2": "value2"}, result)
def test_nested_merge(self):
"""Test nested merge."""
source = {"key1": {"key1.1": "value1.1"}}
candidate = {"key1": {"key1.2": "value1.2"}}
result = util.mergedict(source, candidate)
self.assertEqual(
{"key1": {"key1.1": "value1.1", "key1.2": "value1.2"}}, result)
def test_merge_does_not_override(self):
"""Test that candidate doesn't override source."""
source = {"key1": "value1", "key2": "value2"}
candidate = {"key1": "value2", "key2": "NEW VALUE"}
result = util.mergedict(source, candidate)
self.assertEqual(source, result)
def test_empty_candidate(self):
"""Test empty candidate doesn't change source."""
source = {"key": "value"}
candidate = {}
result = util.mergedict(source, candidate)
self.assertEqual(source, result)
def test_empty_source(self):
"""Test empty source is replaced by candidate."""
source = {}
candidate = {"key": "value"}
result = util.mergedict(source, candidate)
self.assertEqual(candidate, result)
def test_non_dict_candidate(self):
"""Test non-dict candidate is discarded."""
source = {"key": "value"}
candidate = "not a dict"
result = util.mergedict(source, candidate)
self.assertEqual(source, result)
def test_non_dict_source(self):
"""Test non-dict source is not modified with a dict candidate."""
source = "not a dict"
candidate = {"key": "value"}
result = util.mergedict(source, candidate)
self.assertEqual(source, result)
def test_neither_dict(self):
"""Test if neither candidate or source is dict source wins."""
source = "source"
candidate = "candidate"
result = util.mergedict(source, candidate)
self.assertEqual(source, result)
class TestGetCfgOptionListOrStr(TestCase):
def test_not_found_no_default(self):
"""None is returned if key is not found and no default given."""
config = {}
result = util.get_cfg_option_list(config, "key")
self.assertEqual(None, result)
def test_not_found_with_default(self):
"""Default is returned if key is not found."""
config = {}
result = util.get_cfg_option_list(config, "key", default=["DEFAULT"])
self.assertEqual(["DEFAULT"], result)
def test_found_with_default(self):
"""Default is not returned if key is found."""
config = {"key": ["value1"]}
result = util.get_cfg_option_list(config, "key", default=["DEFAULT"])
self.assertEqual(["value1"], result)
def test_found_convert_to_list(self):
"""Single string is converted to one element list."""
config = {"key": "value1"}
result = util.get_cfg_option_list(config, "key")
self.assertEqual(["value1"], result)
def test_value_is_none(self):
"""If value is None empty list is returned."""
config = {"key": None}
result = util.get_cfg_option_list(config, "key")
self.assertEqual([], result)
class TestWriteFile(MockerTestCase):
def setUp(self):
super(TestWriteFile, self).setUp()
self.tmp = self.makeDir(prefix="unittest_")
def test_basic_usage(self):
"""Verify basic usage with default args."""
path = os.path.join(self.tmp, "NewFile.txt")
contents = "Hey there"
util.write_file(path, contents)
self.assertTrue(os.path.exists(path))
self.assertTrue(os.path.isfile(path))
with open(path) as f:
create_contents = f.read()
self.assertEqual(contents, create_contents)
file_stat = os.stat(path)
self.assertEqual(0644, stat.S_IMODE(file_stat.st_mode))
def test_dir_is_created_if_required(self):
"""Verifiy that directories are created is required."""
dirname = os.path.join(self.tmp, "subdir")
path = os.path.join(dirname, "NewFile.txt")
contents = "Hey there"
util.write_file(path, contents)
self.assertTrue(os.path.isdir(dirname))
self.assertTrue(os.path.isfile(path))
def test_custom_mode(self):
"""Verify custom mode works properly."""
path = os.path.join(self.tmp, "NewFile.txt")
contents = "Hey there"
util.write_file(path, contents, mode=0666)
self.assertTrue(os.path.exists(path))
self.assertTrue(os.path.isfile(path))
file_stat = os.stat(path)
self.assertEqual(0666, stat.S_IMODE(file_stat.st_mode))
def test_custom_omode(self):
"""Verify custom omode works properly."""
path = os.path.join(self.tmp, "NewFile.txt")
contents = "Hey there"
# Create file first with basic content
with open(path, "wb") as f:
f.write("LINE1\n")
util.write_file(path, contents, omode="a")
self.assertTrue(os.path.exists(path))
self.assertTrue(os.path.isfile(path))
with open(path) as f:
create_contents = f.read()
self.assertEqual("LINE1\nHey there", create_contents)
def test_restorecon_if_possible_is_called(self):
"""Make sure the selinux guard is called correctly."""
import_mock = self.mocker.replace(importer.import_module,
passthrough=False)
import_mock('selinux')
fake_se = FakeSelinux('/etc/hosts')
self.mocker.result(fake_se)
self.mocker.replay()
with util.SeLinuxGuard("/etc/hosts") as is_on:
self.assertTrue(is_on)
self.assertEqual(1, len(fake_se.restored))
self.assertEqual('/etc/hosts', fake_se.restored[0])
class TestDeleteDirContents(MockerTestCase):
def setUp(self):
super(TestDeleteDirContents, self).setUp()
self.tmp = self.makeDir(prefix="unittest_")
def assertDirEmpty(self, dirname):
self.assertEqual([], os.listdir(dirname))
def test_does_not_delete_dir(self):
"""Ensure directory itself is not deleted."""
util.delete_dir_contents(self.tmp)
self.assertTrue(os.path.isdir(self.tmp))
self.assertDirEmpty(self.tmp)
def test_deletes_files(self):
"""Single file should be deleted."""
with open(os.path.join(self.tmp, "new_file.txt"), "wb") as f:
f.write("DELETE ME")
util.delete_dir_contents(self.tmp)
self.assertDirEmpty(self.tmp)
def test_deletes_empty_dirs(self):
"""Empty directories should be deleted."""
os.mkdir(os.path.join(self.tmp, "new_dir"))
util.delete_dir_contents(self.tmp)
self.assertDirEmpty(self.tmp)
def test_deletes_nested_dirs(self):
"""Nested directories should be deleted."""
os.mkdir(os.path.join(self.tmp, "new_dir"))
os.mkdir(os.path.join(self.tmp, "new_dir", "new_subdir"))
util.delete_dir_contents(self.tmp)
self.assertDirEmpty(self.tmp)
def test_deletes_non_empty_dirs(self):
"""Non-empty directories should be deleted."""
os.mkdir(os.path.join(self.tmp, "new_dir"))
f_name = os.path.join(self.tmp, "new_dir", "new_file.txt")
with open(f_name, "wb") as f:
f.write("DELETE ME")
util.delete_dir_contents(self.tmp)
self.assertDirEmpty(self.tmp)
def test_deletes_symlinks(self):
"""Symlinks should be deleted."""
file_name = os.path.join(self.tmp, "new_file.txt")
link_name = os.path.join(self.tmp, "new_file_link.txt")
with open(file_name, "wb") as f:
f.write("DELETE ME")
os.symlink(file_name, link_name)
util.delete_dir_contents(self.tmp)
self.assertDirEmpty(self.tmp)
class TestKeyValStrings(TestCase):
def test_keyval_str_to_dict(self):
expected = {'1': 'one', '2': 'one+one', 'ro': True}
cmdline = "1=one ro 2=one+one"
self.assertEqual(expected, util.keyval_str_to_dict(cmdline))
class TestGetCmdline(TestCase):
def test_cmdline_reads_debug_env(self):
os.environ['DEBUG_PROC_CMDLINE'] = 'abcd 123'
self.assertEqual(os.environ['DEBUG_PROC_CMDLINE'], util.get_cmdline())
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