~oddbloke/cloud-init/fix-gce-az

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
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

from .helpers import TestCase


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(TestCase):

    def setUp(self):
        super(TestWalkerHandleHandler, self).setUp()
        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.
        resources = ExitStack()
        self.addCleanup(resources.close)
        self.write_file_mock = resources.enter_context(
            mock.patch('cloudinit.util.write_file'))

    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_once_with(self.expected_module_name)
        self.write_file_mock.assert_called_once_with(
            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_once_with(self.expected_module_name)
        self.write_file_mock.assert_called_once_with(
            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_once_with(self.expected_module_name)
        self.write_file_mock.assert_called_once_with(
            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_once_with(
            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_once_with(
            self.data, self.ctype, self.filename, self.payload,
            settings.PER_INSTANCE)

    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_once_with(
            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)
        self.assertEqual(0, mod_mock.handle_part.call_count)

    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)
        mod_mock.handle_part.side_effect = Exception
        try:
            handlers.run_part(mod_mock, self.data, self.filename,
                              self.payload, self.frequency, self.headers)
        except Exception:
            self.fail("Exception was not caught in handle_part")

        mod_mock.handle_part.assert_called_once_with(
            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 = b"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 = b"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=b"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(b'')):
            self.assertEqual(
                util.get_cmdline_url(names=["does-not-appear"],
                                     starts="#cloud-config", cmdline=cmdline),
                (None, None, None))


# vi: ts=4 expandtab