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, 42 insertions, 0 deletions

diff --git a/tests/unittests/distros/test_hostname.py b/tests/unittests/distros/test_hostname.py
new file mode 100644
index 00000000..f6d4dbe5
--- /dev/null
+++ b/tests/unittests/distros/test_hostname.py
@@ -0,0 +1,42 @@
+# This file is part of cloud-init. See LICENSE file for license information.
+
+import unittest
+
+from cloudinit.distros.parsers import hostname
+
+
+BASE_HOSTNAME = '''
+# My super-duper-hostname
+
+blahblah
+
+'''
+BASE_HOSTNAME = BASE_HOSTNAME.strip()
+
+
+class TestHostnameHelper(unittest.TestCase):
+    def test_parse_same(self):
+        hn = hostname.HostnameConf(BASE_HOSTNAME)
+        self.assertEqual(str(hn).strip(), BASE_HOSTNAME)
+        self.assertEqual(hn.hostname, 'blahblah')
+
+    def test_no_adjust_hostname(self):
+        hn = hostname.HostnameConf(BASE_HOSTNAME)
+        prev_name = hn.hostname
+        hn.set_hostname("")
+        self.assertEqual(hn.hostname, prev_name)
+
+    def test_adjust_hostname(self):
+        hn = hostname.HostnameConf(BASE_HOSTNAME)
+        prev_name = hn.hostname
+        self.assertEqual(prev_name, 'blahblah')
+        hn.set_hostname("bbbbd")
+        self.assertEqual(hn.hostname, 'bbbbd')
+        expected_out = '''
+# My super-duper-hostname
+
+bbbbd
+'''
+        self.assertEqual(str(hn).strip(), expected_out.strip())
+
+# vi: ts=4 expandtab