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, 45 insertions, 0 deletions

diff --git a/tests/unittests/distros/test_hosts.py b/tests/unittests/distros/test_hosts.py
new file mode 100644
index 00000000..8aaa6e48
--- /dev/null
+++ b/tests/unittests/distros/test_hosts.py
@@ -0,0 +1,45 @@
+# This file is part of cloud-init. See LICENSE file for license information.
+
+import unittest
+
+from cloudinit.distros.parsers import hosts
+
+
+BASE_ETC = '''
+# Example
+127.0.0.1	localhost
+192.168.1.10	foo.mydomain.org  foo
+192.168.1.10 	bar.mydomain.org  bar
+146.82.138.7	master.debian.org      master
+209.237.226.90	www.opensource.org
+'''
+BASE_ETC = BASE_ETC.strip()
+
+
+class TestHostsHelper(unittest.TestCase):
+    def test_parse(self):
+        eh = hosts.HostsConf(BASE_ETC)
+        self.assertEqual(eh.get_entry('127.0.0.1'), [['localhost']])
+        self.assertEqual(eh.get_entry('192.168.1.10'),
+                         [['foo.mydomain.org', 'foo'],
+                          ['bar.mydomain.org', 'bar']])
+        eh = str(eh)
+        self.assertTrue(eh.startswith('# Example'))
+
+    def test_add(self):
+        eh = hosts.HostsConf(BASE_ETC)
+        eh.add_entry('127.0.0.0', 'blah')
+        self.assertEqual(eh.get_entry('127.0.0.0'), [['blah']])
+        eh.add_entry('127.0.0.3', 'blah', 'blah2', 'blah3')
+        self.assertEqual(eh.get_entry('127.0.0.3'),
+                         [['blah', 'blah2', 'blah3']])
+
+    def test_del(self):
+        eh = hosts.HostsConf(BASE_ETC)
+        eh.add_entry('127.0.0.0', 'blah')
+        self.assertEqual(eh.get_entry('127.0.0.0'), [['blah']])
+
+        eh.del_entries('127.0.0.0')
+        self.assertEqual(eh.get_entry('127.0.0.0'), [])
+
+# vi: ts=4 expandtab