Add unit tests for validator

We need to bump our minimum version for mock to 3.0.0 in order for
mocking of 'open' to work correctly with the ConfigParser. From the
mock changelog: "Issue #32933: unittest.mock.mock_open() now supports
iteration over the file contents."

Change-Id: I9522083b7b0f785fe0e9cbdf8a9042112820bed4

4 files changed, 123 insertions, 5 deletions

diff --git a/lower-constraints.txt b/lower-constraints.txt
index a68ae4f..ccfe33b 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -20,7 +20,7 @@ keystoneauth1==3.4.0
 linecache2==1.0.0
 MarkupSafe==1.0
 mccabe==0.2.1
-mock==2.0.0
+mock==3.0.0
 mox3==0.20.0
 netaddr==0.7.18
 openstackdocstheme==1.18.1
diff --git a/oslo_config/tests/test_validator.py b/oslo_config/tests/test_validator.py
new file mode 100644
index 0000000..9d4aef8
--- /dev/null
+++ b/oslo_config/tests/test_validator.py
@@ -0,0 +1,114 @@
+# Copyright 2019 Red Hat, Inc.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import mock
+from oslotest import base
+import six
+
+from oslo_config import cfg
+from oslo_config import fixture
+from oslo_config import validator
+
+
+OPT_DATA = {'options': {'foo': {'opts': [{'name': 'opt'}]},
+                        'bar': {'opts': [{'name': 'opt'}]},
+                        },
+            'deprecated_options': {'bar': [{'name': 'opt'}]}}
+VALID_CONF = """
+[foo]
+opt = value
+"""
+DEPRECATED_CONF = """
+[bar]
+opt = value
+"""
+INVALID_CONF = """
+[foo]
+opts = value
+"""
+MISSING_GROUP_CONF = """
+[oo]
+opt = value
+"""
+
+
+class TestValidator(base.BaseTestCase):
+    def setUp(self):
+        super(TestValidator, self).setUp()
+        self.conf = cfg.ConfigOpts()
+        self.conf_fixture = self.useFixture(fixture.Config(self.conf))
+        validator._register_cli_opts(self.conf)
+        if six.PY2:
+            self.open_name = '__builtin__.open'
+        else:
+            self.open_name = 'builtins.open'
+
+    @mock.patch('oslo_config.validator.load_opt_data')
+    def test_passing(self, mock_lod):
+        mock_lod.return_value = OPT_DATA
+        self.conf_fixture.config(opt_data='mocked.yaml',
+                                 input_file='mocked.conf')
+        m = mock.mock_open(read_data=VALID_CONF)
+        with mock.patch(self.open_name, m):
+            self.assertEqual(0, validator._validate(self.conf))
+
+    @mock.patch('oslo_config.validator.load_opt_data')
+    def test_deprecated(self, mock_lod):
+        mock_lod.return_value = OPT_DATA
+        self.conf_fixture.config(opt_data='mocked.yaml',
+                                 input_file='mocked.conf')
+        m = mock.mock_open(read_data=DEPRECATED_CONF)
+        with mock.patch(self.open_name, m):
+            self.assertEqual(0, validator._validate(self.conf))
+
+    @mock.patch('oslo_config.validator.load_opt_data')
+    def test_deprecated_fatal_warnings(self, mock_lod):
+        mock_lod.return_value = OPT_DATA
+        self.conf_fixture.config(opt_data='mocked.yaml',
+                                 input_file='mocked.conf',
+                                 fatal_warnings=True)
+        m = mock.mock_open(read_data=DEPRECATED_CONF)
+        with mock.patch(self.open_name, m):
+            self.assertEqual(1, validator._validate(self.conf))
+
+    @mock.patch('oslo_config.validator.load_opt_data')
+    def test_missing(self, mock_lod):
+        mock_lod.return_value = OPT_DATA
+        self.conf_fixture.config(opt_data='mocked.yaml',
+                                 input_file='mocked.conf')
+        m = mock.mock_open(read_data=INVALID_CONF)
+        with mock.patch(self.open_name, m):
+            self.assertEqual(1, validator._validate(self.conf))
+
+    @mock.patch('oslo_config.validator.load_opt_data')
+    def test_missing_group(self, mock_lod):
+        mock_lod.return_value = OPT_DATA
+        self.conf_fixture.config(opt_data='mocked.yaml',
+                                 input_file='mocked.conf')
+        m = mock.mock_open(read_data=MISSING_GROUP_CONF)
+        with mock.patch(self.open_name, m):
+            self.assertEqual(1, validator._validate(self.conf))
+
+    @mock.patch('oslo_config.validator.load_opt_data')
+    def test_exclude_groups(self, mock_lod):
+        mock_lod.return_value = OPT_DATA
+        self.conf_fixture.config(opt_data='mocked.yaml',
+                                 input_file='mocked.conf',
+                                 exclude_group=['oo'])
+        m = mock.mock_open(read_data=MISSING_GROUP_CONF)
+        with mock.patch(self.open_name, m):
+            self.assertEqual(0, validator._validate(self.conf))
+
+    def test_invalid_options(self):
+        self.assertRaises(RuntimeError, validator._validate, self.conf)
diff --git a/oslo_config/validator.py b/oslo_config/validator.py
index 6f8771e..268c672 100644
--- a/oslo_config/validator.py
+++ b/oslo_config/validator.py
@@ -85,17 +85,21 @@ def _validate_opt(group, option, opt_data):
     return option in name_data
 
 
+def load_opt_data(conf):
+    with open(conf.opt_data) as f:
+        return yaml.safe_load(f)
+
+
 def _validate(conf):
     conf.register_opts(_validator_opts)
     if conf.namespace:
         groups = generator._get_groups(generator._list_opts(conf.namespace))
         opt_data = generator._generate_machine_readable_data(groups, conf)
     elif conf.opt_data:
-        with open(conf.opt_data) as f:
-            opt_data = yaml.safe_load(f)
+        opt_data = load_opt_data(conf)
     else:
         # TODO(bnemec): Implement this logic with group?
-        raise RuntimeError('Neither namespace or opt-data provided.')
+        raise RuntimeError('Neither namespace nor opt-data provided.')
     sections = {}
     parser = cfg.ConfigParser(conf.input_file, sections)
     parser.parse()
diff --git a/test-requirements.txt b/test-requirements.txt
index dab06dd..ce22df6 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -24,7 +24,7 @@ sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
 sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4' # BSD
 
 # mocking framework
-mock>=2.0.0 # BSD
+mock>=3.0.0 # BSD
 requests_mock>=1.5.0 # Apache-2.0
 
 # Bandit security code scanner