tests: use cloudinit.tests.TestCase everywhere

It seems sane to have consistent use of a 'TestCase' class wherever
possible.

I stumbled on need for this in porting some code (the reporter)
back to cloud-init 0.7.

Change-Id: Ia10546484dfe73154a68e817129ac2f950d5fe85

cloudinit/tests/osys/test_base.py

@@ -13,13 +13,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import unittest
-
 from cloudinit.osys import base
+from cloudinit.tests import TestCase
 from cloudinit.tests.util import mock
 
 
-class TestOSUtils(unittest.TestCase):
+class TestOSUtils(TestCase):
 
     @mock.patch('importlib.import_module')
     @mock.patch('platform.linux_distribution')

cloudinit/tests/osys/windows/test_general.py

@@ -4,15 +4,16 @@
 # vi: ts=4 expandtab
 
 import importlib
-import unittest
 
 from cloudinit import exceptions
+from cloudinit.tests import TestCase
 from cloudinit.tests.util import mock
 
 
-class TestWindowsGeneral(unittest.TestCase):
+class TestWindowsGeneral(TestCase):
 
     def setUp(self):
+        super(TestWindowsGeneral, self).setUp()
         self._ctypes_mock = mock.Mock()
         self._util_mock = mock.MagicMock()
         self._module_patcher = mock.patch.dict(
@@ -27,6 +28,7 @@ class TestWindowsGeneral(unittest.TestCase):
         self._general = self._general_module.General()
 
     def tearDown(self):
+        super(TestWindowsGeneral, self).tearDown()
         self._module_patcher.stop()
 
     def _test_check_os_version(self, ret_value, error_value=None):

cloudinit/tests/test_reporting.py

@@ -3,8 +3,6 @@
 #
 # vi: ts=4 expandtab
 
-import unittest
-
 from cloudinit import reporting
 from cloudinit.tests import TestCase
 from cloudinit.tests.util import mock
@@ -15,7 +13,7 @@ def _fake_registry():
                                        'b': mock.MagicMock()})
 
 
-class TestReportStartEvent(unittest.TestCase):
+class TestReportStartEvent(TestCase):
 
     @mock.patch('cloudinit.reporting.instantiated_handler_registry',
                 new_callable=_fake_registry)
@@ -32,7 +30,7 @@ class TestReportStartEvent(unittest.TestCase):
             self.assertEqual(expected_string_representation, event.as_string())
 
 
-class TestReportFinishEvent(unittest.TestCase):
+class TestReportFinishEvent(TestCase):
 
     def _report_finish_event(self, successful=None):
         event_name, event_description = 'my_test_event', 'my description'
@@ -83,7 +81,7 @@ class TestReportFinishEvent(unittest.TestCase):
             expected_string_representation)
 
 
-class TestReportingEvent(unittest.TestCase):
+class TestReportingEvent(TestCase):
 
     def test_as_string(self):
         event_type, name, description = 'test_type', 'test_name', 'test_desc'

cloudinit/tests/test_safeyaml.py

@@ -4,12 +4,12 @@
 # vi: ts=4 expandtab
 
 from cloudinit import safeyaml as yaml
-from cloudinit import tests
+from cloudinit.tests import TestCase
 
 import tempfile
 
 
-class TestSafeYaml(tests.TestCase):
+class TestSafeYaml(TestCase):
     def test_simple(self):
         blob = '\nk1: one\nk2: two'
         expected = {'k1': "one", 'k2': "two"}

cloudinit/tests/test_templating.py

@@ -9,10 +9,10 @@ import os
 import textwrap
 
 from cloudinit import templater
-from cloudinit import tests
+from cloudinit.tests import TestCase
 
 
-class TestTemplates(tests.TestCase):
+class TestTemplates(TestCase):
     jinja_tmpl = '\n'.join((
         "## template:jinja",
         "{{a}},{{b}}",

cloudinit/tests/test_url_helper.py

@@ -5,7 +5,7 @@
 
 import httpretty
 
-from cloudinit import tests
+from cloudinit.tests import TestCase
 from cloudinit.tests.util import mock
 from cloudinit import url_helper
 
@@ -24,7 +24,7 @@ class TimeJumpSideEffect(object):
         return next(self.time)
 
 
-class UrlHelperWaitForUrlsTest(tests.TestCase):
+class UrlHelperWaitForUrlsTest(TestCase):
 
     @httpretty.activate
     def test_url_wait_for(self):
@@ -68,7 +68,7 @@ class UrlHelperWaitForUrlsTest(tests.TestCase):
         self.assertIsNone(url_helper.wait_any_url(urls, max_wait=1))
 
 
-class UrlHelperFetchTest(tests.TestCase):
+class UrlHelperFetchTest(TestCase):
 
     @httpretty.activate
     def test_url_fetch(self):