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, 65 insertions, 0 deletions

diff --git a/tests/unittests/distros/test_resolv.py b/tests/unittests/distros/test_resolv.py
new file mode 100644
index 00000000..e7971627
--- /dev/null
+++ b/tests/unittests/distros/test_resolv.py
@@ -0,0 +1,65 @@
+# This file is part of cloud-init. See LICENSE file for license information.
+
+from cloudinit.distros.parsers import resolv_conf
+
+from tests.unittests.helpers import TestCase
+
+import re
+
+
+BASE_RESOLVE = '''
+; generated by /sbin/dhclient-script
+search blah.yahoo.com yahoo.com
+nameserver 10.15.44.14
+nameserver 10.15.30.92
+'''
+BASE_RESOLVE = BASE_RESOLVE.strip()
+
+
+class TestResolvHelper(TestCase):
+    def test_parse_same(self):
+        rp = resolv_conf.ResolvConf(BASE_RESOLVE)
+        rp_r = str(rp).strip()
+        self.assertEqual(BASE_RESOLVE, rp_r)
+
+    def test_local_domain(self):
+        rp = resolv_conf.ResolvConf(BASE_RESOLVE)
+        self.assertIsNone(rp.local_domain)
+
+        rp.local_domain = "bob"
+        self.assertEqual('bob', rp.local_domain)
+        self.assertIn('domain bob', str(rp))
+
+    def test_nameservers(self):
+        rp = resolv_conf.ResolvConf(BASE_RESOLVE)
+        self.assertIn('10.15.44.14', rp.nameservers)
+        self.assertIn('10.15.30.92', rp.nameservers)
+        rp.add_nameserver('10.2')
+        self.assertIn('10.2', rp.nameservers)
+        self.assertIn('nameserver 10.2', str(rp))
+        self.assertNotIn('10.3', rp.nameservers)
+        self.assertEqual(len(rp.nameservers), 3)
+        rp.add_nameserver('10.2')
+        rp.add_nameserver('10.3')
+        self.assertNotIn('10.3', rp.nameservers)
+
+    def test_search_domains(self):
+        rp = resolv_conf.ResolvConf(BASE_RESOLVE)
+        self.assertIn('yahoo.com', rp.search_domains)
+        self.assertIn('blah.yahoo.com', rp.search_domains)
+        rp.add_search_domain('bbb.y.com')
+        self.assertIn('bbb.y.com', rp.search_domains)
+        self.assertTrue(re.search(r'search(.*)bbb.y.com(.*)', str(rp)))
+        self.assertIn('bbb.y.com', rp.search_domains)
+        rp.add_search_domain('bbb.y.com')
+        self.assertEqual(len(rp.search_domains), 3)
+        rp.add_search_domain('bbb2.y.com')
+        self.assertEqual(len(rp.search_domains), 4)
+        rp.add_search_domain('bbb3.y.com')
+        self.assertEqual(len(rp.search_domains), 5)
+        rp.add_search_domain('bbb4.y.com')
+        self.assertEqual(len(rp.search_domains), 6)
+        self.assertRaises(ValueError, rp.add_search_domain, 'bbb5.y.com')
+        self.assertEqual(len(rp.search_domains), 6)
+
+# vi: ts=4 expandtab