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import os
import shutil
import tempfile
import unittest
try:
from unittest import mock
except ImportError:
import mock
try:
from contextlib import ExitStack
except ImportError:
from contextlib2 import ExitStack
from cloudinit import handlers
from cloudinit import helpers
from cloudinit import settings
from cloudinit import url_helper
from cloudinit import util
class FakeModule(handlers.Handler):
def __init__(self):
handlers.Handler.__init__(self, settings.PER_ALWAYS)
self.types = []
def list_types(self):
return self.types
def handle_part(self, data, ctype, filename, payload, frequency):
pass
class TestWalkerHandleHandler(unittest.TestCase):
def setUp(self):
unittest.TestCase.setUp(self)
tmpdir = tempfile.mkdtemp()
self.addCleanup(shutil.rmtree, tmpdir)
self.data = {
"handlercount": 0,
"frequency": "",
"handlerdir": tmpdir,
"handlers": helpers.ContentHandlers(),
"data": None}
self.expected_module_name = "part-handler-%03d" % (
self.data["handlercount"],)
expected_file_name = "%s.py" % self.expected_module_name
self.expected_file_fullname = os.path.join(
self.data["handlerdir"], expected_file_name)
self.module_fake = FakeModule()
self.ctype = None
self.filename = None
self.payload = "dummy payload"
# Mock the write_file() function. We'll assert that it got called as
# expected in each of the individual tests.
self.resources = ExitStack()
self.write_file_mock = self.resources.enter_context(
mock.patch('cloudinit.util.write_file'))
def tearDown(self):
self.resources.close()
unittest.TestCase.tearDown(self)
def test_no_errors(self):
"""Payload gets written to file and added to C{pdata}."""
with mock.patch('cloudinit.importer.import_module',
return_value=self.module_fake) as mockobj:
handlers.walker_handle_handler(self.data, self.ctype,
self.filename, self.payload)
mockobj.assert_called_with_once(self.expected_module_name)
self.write_file_mock.assert_called_with_once(
self.expected_file_fullname, self.payload, 0o600)
self.assertEqual(self.data['handlercount'], 1)
def test_import_error(self):
"""Module import errors are logged. No handler added to C{pdata}."""
with mock.patch('cloudinit.importer.import_module',
side_effect=ImportError) as mockobj:
handlers.walker_handle_handler(self.data, self.ctype,
self.filename, self.payload)
mockobj.assert_called_with_once(self.expected_module_name)
self.write_file_mock.assert_called_with_once(
self.expected_file_fullname, self.payload, 0o600)
self.assertEqual(self.data['handlercount'], 0)
def test_attribute_error(self):
"""Attribute errors are logged. No handler added to C{pdata}."""
with mock.patch('cloudinit.importer.import_module',
side_effect=AttributeError,
return_value=self.module_fake) as mockobj:
handlers.walker_handle_handler(self.data, self.ctype,
self.filename, self.payload)
mockobj.assert_called_with_once(self.expected_module_name)
self.write_file_mock.assert_called_with_once(
self.expected_file_fullname, self.payload, 0o600)
self.assertEqual(self.data['handlercount'], 0)
class TestHandlerHandlePart(unittest.TestCase):
def setUp(self):
self.data = "fake data"
self.ctype = "fake ctype"
self.filename = "fake filename"
self.payload = "fake payload"
self.frequency = settings.PER_INSTANCE
self.headers = {
'Content-Type': self.ctype,
}
def test_normal_version_1(self):
"""
C{handle_part} is called without C{frequency} for
C{handler_version} == 1.
"""
mod_mock = mock.Mock(frequency=settings.PER_INSTANCE,
handler_version=1)
handlers.run_part(mod_mock, self.data, self.filename, self.payload,
self.frequency, self.headers)
# Assert that the handle_part() method of the mock object got
# called with the expected arguments.
mod_mock.handle_part.assert_called_with_once(
self.data, self.ctype, self.filename, self.payload)
def test_normal_version_2(self):
"""
C{handle_part} is called with C{frequency} for
C{handler_version} == 2.
"""
mod_mock = mock.Mock(frequency=settings.PER_INSTANCE,
handler_version=2)
handlers.run_part(mod_mock, self.data, self.filename, self.payload,
self.frequency, self.headers)
# Assert that the handle_part() method of the mock object got
# called with the expected arguments.
mod_mock.handle_part.assert_called_with_once(
self.data, self.ctype, self.filename, self.payload)
def test_modfreq_per_always(self):
"""
C{handle_part} is called regardless of frequency if nofreq is always.
"""
self.frequency = "once"
mod_mock = mock.Mock(frequency=settings.PER_ALWAYS,
handler_version=1)
handlers.run_part(mod_mock, self.data, self.filename, self.payload,
self.frequency, self.headers)
# Assert that the handle_part() method of the mock object got
# called with the expected arguments.
mod_mock.handle_part.assert_called_with_once(
self.data, self.ctype, self.filename, self.payload)
def test_no_handle_when_modfreq_once(self):
"""C{handle_part} is not called if frequency is once."""
self.frequency = "once"
mod_mock = mock.Mock(frequency=settings.PER_ONCE)
handlers.run_part(mod_mock, self.data, self.filename, self.payload,
self.frequency, self.headers)
# Assert that the handle_part() method of the mock object got
# called with the expected arguments.
mod_mock.handle_part.assert_called_with_once(
self.data, self.ctype, self.filename, self.payload)
def test_exception_is_caught(self):
"""Exceptions within C{handle_part} are caught and logged."""
mod_mock = mock.Mock(frequency=settings.PER_INSTANCE,
handler_version=1)
handlers.run_part(mod_mock, self.data, self.filename, self.payload,
self.frequency, self.headers)
mod_mock.handle_part.side_effect = Exception
handlers.run_part(mod_mock, self.data, self.filename, self.payload,
self.frequency, self.headers)
mod_mock.handle_part.assert_called_with_once(
self.data, self.ctype, self.filename, self.payload)
class TestCmdlineUrl(unittest.TestCase):
def test_invalid_content(self):
url = "http://example.com/foo"
key = "mykey"
payload = "0"
cmdline = "ro %s=%s bar=1" % (key, url)
with mock.patch('cloudinit.url_helper.readurl',
return_value=url_helper.StringResponse(payload)):
self.assertEqual(
util.get_cmdline_url(names=[key], starts="xxxxxx",
cmdline=cmdline),
(key, url, None))
def test_valid_content(self):
url = "http://example.com/foo"
key = "mykey"
payload = "xcloud-config\nmydata: foo\nbar: wark\n"
cmdline = "ro %s=%s bar=1" % (key, url)
with mock.patch('cloudinit.url_helper.readurl',
return_value=url_helper.StringResponse(payload)):
self.assertEqual(
util.get_cmdline_url(names=[key], starts="xcloud-config",
cmdline=cmdline),
(key, url, payload))
def test_no_key_found(self):
url = "http://example.com/foo"
key = "mykey"
cmdline = "ro %s=%s bar=1" % (key, url)
with mock.patch('cloudinit.url_helper.readurl',
return_value=url_helper.StringResponse('')):
self.assertEqual(
util.get_cmdline_url(names=["does-not-appear"],
starts="#cloud-config", cmdline=cmdline),
(None, None, None))
# vi: ts=4 expandtab
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