Add a resolv.conf parser that can be easily

used for adjusting a resolv.conf formatted
file and use this to adjust the resolv.conf
in the redhat distro instead of replacing
the previous resolv.conf completely.

1 files changed, 61 insertions, 0 deletions

diff --git a/tests/unittests/test_distros/test_resolv.py b/tests/unittests/test_distros/test_resolv.py
new file mode 100644
index 00000000..5f122833
--- /dev/null
+++ b/tests/unittests/test_distros/test_resolv.py
@@ -0,0 +1,61 @@
+from mocker import MockerTestCase
+
+from cloudinit.distros import helpers
+
+
+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(MockerTestCase):
+    def test_parse_same(self):
+        rp = helpers.ResolvConf(BASE_RESOLVE)
+        rp_r = str(rp).strip()
+        self.assertEquals(BASE_RESOLVE, rp_r)
+
+    def test_local_domain(self):
+        rp = helpers.ResolvConf(BASE_RESOLVE)
+        self.assertEquals(None, rp.local_domain)
+
+        rp.local_domain = "bob"
+        self.assertEquals('bob', rp.local_domain)
+        self.assertIn('domain bob', str(rp))
+
+    def test_nameservers(self):
+        rp = helpers.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.assertEquals(len(rp.nameservers), 3)
+        rp.add_nameserver('10.2')
+        with self.assertRaises(ValueError):
+            rp.add_nameserver('10.3')
+        self.assertNotIn('10.3', rp.nameservers)
+
+    def test_search_domains(self):
+        rp = helpers.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.assertRegexpMatches(str(rp), r'search(.*)bbb.y.com(.*)')
+        self.assertIn('bbb.y.com', rp.search_domains)
+        rp.add_search_domain('bbb.y.com')
+        self.assertEquals(len(rp.search_domains), 3)
+        rp.add_search_domain('bbb2.y.com')
+        self.assertEquals(len(rp.search_domains), 4)
+        rp.add_search_domain('bbb3.y.com')
+        self.assertEquals(len(rp.search_domains), 5)
+        rp.add_search_domain('bbb4.y.com')
+        self.assertEquals(len(rp.search_domains), 6)
+        with self.assertRaises(ValueError):
+            rp.add_search_domain('bbb5.y.com')
+        self.assertEquals(len(rp.search_domains), 6)