def test_open_permissions_new_database(self):
# ConfigurationDatabase.open() applies restrictive file permissions to
# newly created configuration databases.
config_file = os.path.join(self.make_dir(), "config")
with ConfigurationDatabase.open(config_file):
perms = FilePath(config_file).getPermissions()
self.assertEqual("rw-r-----", perms.shorthand())
def test_open_yields_immutable_backend(self):
config_file = os.path.join(self.make_dir(), "config")
config_key = factory.make_name("key")
with ConfigurationDatabase.open(config_file) as config:
with ExpectedException(ConfigurationImmutable):
config[config_key] = factory.make_name("value")
with ExpectedException(ConfigurationImmutable):
del config[config_key]
def test_opened_database_commits_on_exit(self):
config_file = os.path.join(self.make_dir(), "config")
config_key = factory.make_name("key")
config_value = factory.make_name("value")
with ConfigurationDatabase.open_for_update(config_file) as config:
config[config_key] = config_value
with ConfigurationDatabase.open(config_file) as config:
self.assertEqual(config_value, config[config_key])
def test_open_permissions_existing_database(self):
# ConfigurationDatabase.open() leaves the file permissions of existing
# configuration databases.
config_file = os.path.join(self.make_dir(), "config")
open(config_file, "wb").close() # touch.
os.chmod(config_file, 0o644) # u=rw,go=r
with ConfigurationDatabase.open(config_file):
perms = FilePath(config_file).getPermissions()
self.assertEqual("rw-r--r--", perms.shorthand())
def test_opened_database_rolls_back_on_unclean_exit(self):
config_file = os.path.join(self.make_dir(), "config")
config_key = factory.make_name("key")
config_value = factory.make_name("value")
exception_type = factory.make_exception_type()
# Set a configuration option, then crash.
with ExpectedException(exception_type):
with ConfigurationDatabase.open_for_update(config_file) as config:
config[config_key] = config_value
raise exception_type()
# No value has been saved for `config_key`.
with ConfigurationDatabase.open(config_file) as config:
self.assertRaises(KeyError, lambda: config[config_key])
