Add test for ovs collector module and modify collector

This change includes:

* New test class to test ovs/collector module. Added one test
  in the meantime to test get_env function.

* loading configuration moved to a function, since it affects
  testing.

* Added paramiko to test-requirements since it used by ovs/common

* Minor improvement to get_env function.

Change-Id: I606f1af74a7148057673df1e95c1c80e82777ec3

openstack_dashboard/don/dashboard.py

@@ -1,3 +1,14 @@
+# 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.
 from django.utils.translation import ugettext_lazy as _
 
 import horizon

openstack_dashboard/don/ovs/collector.py

@@ -18,20 +18,20 @@ import re
 
 import openstack_dashboard.don.ovs.common as common
 
-don_config = ConfigParser.ConfigParser()
-try:
-    don_config.read('/etc/don/don.conf')
-except Exception as e:
-    print(e.value)
-deployment_type = don_config.get('DEFAULT', 'deployment_type')
-
 
 def get_env(filename):
+    """Returns environment dictionary created from the environment file.
+
+    :param filename: the name of the environment file.
+    """
+    # Try read enviornment file
     try:
-        lines = open(os.getcwd() + os.sep + filename, 'r').read().splitlines()
+        with open(os.getcwd() + os.sep + filename, 'r') as f:
+            lines = f.read().splitlines()
     except IOError as e:
-        print("%s :%s" % (e.args[1], filename))
-        raise
+        raise(e)
+
+    # Create env dictionary based on lines that starts with 'export ...'
     env = {}
     for line in lines:
         if line.startswith('export'):
@@ -42,8 +42,6 @@ def get_env(filename):
                 env.update({key: val})
     return env
 
-myenv = os.environ.copy()
-myenv.update(get_env('admin-openrc.sh'))
 
 # Contains all info gathered by parsing the output of commands
 info = {
@@ -497,7 +495,6 @@ def neutron_router_list_parser(parse_this):
             'parser': ip_namespace_qrouter_parser,
         }
         add_new_command(commands, cmd_key, cmd)
-    pass
 
 
 def ip_namespace_qrouter_parser(parse_this):
@@ -640,7 +637,6 @@ def neutron_net_list_parser(parse_this):
             'parser': ip_namespace_qdhcp_parser,
         }
         add_new_command(commands, cmd_key, cmd)
-    pass
 
 
 '''
@@ -875,9 +871,9 @@ def all_commands_executed(commands):
     return True
 
 
-def get_vm_info_from_compute(cmd):
+def get_vm_info_from_compute(cmd, my_env):
     output = common.execute_cmd(['nova', 'hypervisor-list'],
-                                sudo=False, shell=False, env=myenv).split('\n')
+                                sudo=False, shell=False, env=my_env).split('\n')
     compute_list = get_hypervisor(output)
     vm_info = []
     compute_creds = common.get_vm_credentials()
@@ -915,7 +911,22 @@ def get_hypervisor(parse_this):
     return hypervisor
 
 
+def load_config():
+    """Loads configuration."""
+    don_config = ConfigParser.ConfigParser()
+    try:
+        don_config.read('/etc/don/don.conf')
+    except Exception as e:
+        raise(e.value)
+    return don_config.get('DEFAULT', 'deployment_type')
+
+
 def main():
+    deployment_type = load_config()
+
+    my_env = os.environ.copy()
+    my_env.update(get_env('admin-openrc.sh'))
+
     check_args()
 
     iteration = 0
@@ -938,7 +949,7 @@ def main():
                 shell = commands[cmd].get('shell', False)
                 env = None
                 if commands[cmd].get('env', False):
-                    env = myenv
+                    env = my_env
                 sudo = commands[cmd].get('sudo', False)
                 if deployment_type == 'multinode':
                     # handling for network node
@@ -948,7 +959,7 @@ def main():
                     if cmd == 'cat_instance':
                         commands[cmd][
                             'output'] = get_vm_info_from_compute(
-                                commands[cmd]['cmd'])
+                                commands[cmd]['cmd'], my_env)
                         print(commands[cmd]['output'])
                     else:
                         commands[cmd]['output'] = common.execute_cmd(
@@ -966,5 +977,6 @@ def main():
         'Writing collected info into ' + common.settings['info_file'])
     common.dump_json(info, common.settings['info_file'])
 
+
 if __name__ == "__main__":
     main()

openstack_dashboard/don/ovs/views.py

@@ -205,7 +205,6 @@ def collect(request):
             status = 1
             macro['collect_status'] = \
                 "Collecton successful. Click visualize to display"
-    # res = collector.main()
     os.chdir(BASE_DIR)
     if status:
         messages.success(request, macro['collect_status'])

openstack_dashboard/tests/base.py

@@ -19,5 +19,4 @@ from oslotest import base
 
 
 class TestCase(base.BaseTestCase):
-
     """Test case base class for all unit tests."""

openstack_dashboard/tests/test_collector.py

@@ -0,0 +1,38 @@
+# 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 os
+import tempfile
+
+import openstack_dashboard.don.ovs.collector as collector
+from openstack_dashboard.tests import base
+
+
+class TestOvsCollector(base.TestCase):
+    """Tests openvswitch collector module."""
+    def setUp(self):
+        super(TestOvsCollector, self).setUp()
+
+        # Create a temporary file
+        self.tmp_fd, self.tmp_fp = tempfile.mkstemp(dir=os.getcwd())
+
+    def tearDown(self):
+        super(TestOvsCollector, self).tearDown()
+
+        # Remove the file
+        os.remove(self.tmp_fp)
+
+    def test_get_env(self):
+        lines = ["export x=2", "export y=3", "z=4"]
+        with open(self.tmp_fp, 'w') as f:
+            f.write("\n".join(lines))
+        env = collector.get_env(os.path.basename(self.tmp_fp))
+        self.assertEqual(env, dict(x='2', y='3'))

test-requirements.txt

@@ -10,6 +10,7 @@ python-subunit>=0.0.18
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
 oslosphinx>=2.5.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
+paramiko
 testrepository>=0.0.18
 testscenarios>=0.4
 testtools>=1.4.0