Properly initialize HostAddress

The HostAddress class wasn't calling super in it's __init__() method,
which resulted in the type_name not being set properly for instances
of that class.

Change-Id: I4e589f2081e5d95227938cba9ad1158548bc1048
Closes-Bug: 1768498

oslo_config/tests/test_generator.py

@@ -13,6 +13,7 @@
 #    under the License.
 
 import sys
+import textwrap
 
 import fixtures
 import mock
@@ -1798,5 +1799,31 @@ class AdvancedOptionsTestCase(base.BaseTestCase):
         self.assertEqual(expected, actual)
 
 
+class HostAddressTestCase(base.BaseTestCase):
+
+    opts = [cfg.HostAddressOpt('foo', help='foo option', default='0.0.0.0')]
+
+    def test_host_address(self):
+
+        config = [("namespace", [("alpha", self.opts)])]
+        groups = generator._get_groups(config)
+
+        out = moves.StringIO()
+        formatter = generator._OptFormatter(output_file=out)
+        generator._output_opts(formatter, 'alpha', groups.pop('alpha'))
+        result = out.getvalue()
+
+        expected = textwrap.dedent('''
+        [alpha]
+
+        #
+        # From namespace
+        #
+
+        # foo option (host address value)
+        #foo = 0.0.0.0
+        ''').lstrip()
+        self.assertEqual(expected, result)
+
 GeneratorTestCase.generate_scenarios()
 MachineReadableGeneratorTestCase.generate_scenarios()

oslo_config/types.py

@@ -823,6 +823,7 @@ class HostAddress(ConfigType):
 
         """
 
+        super(HostAddress, self).__init__(type_name=type_name)
         self.ip_address = IPAddress(version, type_name)
         self.hostname = Hostname('localhost')