Reorganize unit test locations under tests/unittests (#1126)

This attempts to standardize unit test file location under test/unittests/
such that any source file located at cloudinit/path/to/file.py may have a
corresponding unit test file at test/unittests/path/to/test_file.py.

Noteworthy Comments:
====================
Four different duplicate test files existed:
test_{gpg,util,cc_mounts,cc_resolv_conf}.py
Each of these duplicate file pairs has been merged together. This is a
break in git history for these files.

The test suite appears to have a dependency on test order. Changing test
order causes some tests to fail. This should be rectified, but for now
some tests have been modified in
tests/unittests/config/test_set_passwords.py.

A helper class name starts with "Test" which causes pytest to try
executing it as a test case, which then throws warnings "due to Class
having __init__()".  Silence by changing the name of the class.

# helpers.py is imported in many test files, import paths change
cloudinit/tests/helpers.py -> tests/unittests/helpers.py

# Move directories:
cloudinit/distros/tests -> tests/unittests/distros
cloudinit/cmd/devel/tests -> tests/unittests/cmd/devel
cloudinit/cmd/tests -> tests/unittests/cmd/
cloudinit/sources/helpers/tests -> tests/unittests/sources/helpers
cloudinit/sources/tests -> tests/unittests/sources
cloudinit/net/tests -> tests/unittests/net
cloudinit/config/tests -> tests/unittests/config
cloudinit/analyze/tests/ -> tests/unittests/analyze/

# Standardize tests already in tests/unittests/
test_datasource -> sources
test_distros -> distros
test_vmware -> sources/vmware
test_handler -> config        # this contains cloudconfig module tests
test_runs -> runs

1 files changed, 77 insertions, 0 deletions

diff --git a/tests/unittests/config/test_cc_write_files_deferred.py b/tests/unittests/config/test_cc_write_files_deferred.py
new file mode 100644
index 00000000..d33d250a
--- /dev/null
+++ b/tests/unittests/config/test_cc_write_files_deferred.py
@@ -0,0 +1,77 @@
+# This file is part of cloud-init. See LICENSE file for license information.
+
+import tempfile
+import shutil
+
+from cloudinit.config.cc_write_files_deferred import (handle)
+from .test_cc_write_files import (VALID_SCHEMA)
+from cloudinit import log as logging
+from cloudinit import util
+
+from tests.unittests.helpers import (
+    CiTestCase, FilesystemMockingTestCase, mock, skipUnlessJsonSchema)
+
+LOG = logging.getLogger(__name__)
+
+
+@skipUnlessJsonSchema()
+@mock.patch('cloudinit.config.cc_write_files_deferred.write_files')
+class TestWriteFilesDeferredSchema(CiTestCase):
+
+    with_logs = True
+
+    def test_schema_validation_warns_invalid_value(self,
+                                                   m_write_files_deferred):
+        """If 'defer' is defined, it must be of type 'bool'."""
+
+        valid_config = {
+            'write_files': [
+                {**VALID_SCHEMA.get('write_files')[0], 'defer': True}
+            ]
+        }
+
+        invalid_config = {
+            'write_files': [
+                {**VALID_SCHEMA.get('write_files')[0], 'defer': str('no')}
+            ]
+        }
+
+        cc = self.tmp_cloud('ubuntu')
+        handle('cc_write_files_deferred', valid_config, cc, LOG, [])
+        self.assertNotIn('Invalid config:', self.logs.getvalue())
+        handle('cc_write_files_deferred', invalid_config, cc, LOG, [])
+        self.assertIn('Invalid config:', self.logs.getvalue())
+        self.assertIn("defer: 'no' is not of type 'boolean'",
+                      self.logs.getvalue())
+
+
+class TestWriteFilesDeferred(FilesystemMockingTestCase):
+
+    with_logs = True
+
+    def setUp(self):
+        super(TestWriteFilesDeferred, self).setUp()
+        self.tmp = tempfile.mkdtemp()
+        self.addCleanup(shutil.rmtree, self.tmp)
+
+    def test_filtering_deferred_files(self):
+        self.patchUtils(self.tmp)
+        expected = "hello world\n"
+        config = {
+            'write_files': [
+                {
+                    'path': '/tmp/deferred.file',
+                    'defer': True,
+                    'content': expected
+                },
+                {'path': '/tmp/not_deferred.file'}
+            ]
+        }
+        cc = self.tmp_cloud('ubuntu')
+        handle('cc_write_files_deferred', config, cc, LOG, [])
+        self.assertEqual(util.load_file('/tmp/deferred.file'), expected)
+        with self.assertRaises(FileNotFoundError):
+            util.load_file('/tmp/not_deferred.file')
+
+
+# vi: ts=4 expandtab