[connection] Fixed admin tests

Added missing inline form parameters

.travis.yml

@@ -38,6 +38,8 @@ install:
   - pip install $DJANGO
   # temporary, TODO: release django-netjsonconfig 0.8.1 and remove this
   - pip install https://github.com/openwisp/django-netjsonconfig/tarball/master
+  # temporary, TODO: release django-loci 0.2.1 and remove this
+  - pip install https://github.com/openwisp/django-loci/tarball/master
   - python setup.py -q develop
   - if [[ $TRAVIS_PYTHON_VERSION == "2.7" ]]; then pip install git+git://github.com/tinio/pysqlite.git@extension-enabled#egg=pysqlite; fi
 

openwisp_controller/config/tests/test_admin.py

@@ -41,6 +41,15 @@ class TestAdmin(CreateConfigTemplateMixin, TestAdminMixin,
         'config-INITIAL_FORMS': 0,
         'config-MIN_NUM_FORMS': 0,
         'config-MAX_NUM_FORMS': 1,
+        # openwisp_controller.connection
+        'deviceconnection_set-TOTAL_FORMS': 0,
+        'deviceconnection_set-INITIAL_FORMS': 0,
+        'deviceconnection_set-MIN_NUM_FORMS': 0,
+        'deviceconnection_set-MAX_NUM_FORMS': 1000,
+        'deviceip_set-TOTAL_FORMS': 0,
+        'deviceip_set-INITIAL_FORMS': 0,
+        'deviceip_set-MIN_NUM_FORMS': 0,
+        'deviceip_set-MAX_NUM_FORMS': 1000,
     }
     # WARNING - WATCHOUT
     # this class attribute is changed dinamically

openwisp_controller/connection/connectors/ssh.py

@@ -1,14 +1,15 @@
 import logging
+import sys
 
 import paramiko
 from django.utils.functional import cached_property
 from jsonschema import validate
 from jsonschema.exceptions import ValidationError as SchemaError
 from scp import SCPClient
 
-try:
+if sys.version_info.major > 2:  # pragma: nocover
     from io import StringIO
-except ImportError:
+else:  # pragma: nocover
     from StringIO import StringIO
 
 

openwisp_controller/connection/models.py

@@ -72,7 +72,6 @@ def __str__(self):
         return '{0} ({1})'.format(self.name, self.get_connector_display())
 
 
-@python_2_unicode_compatible
 class DeviceConnection(ConnectorMixin, TimeStampedEditableModel):
     _connector_field = 'update_strategy'
     device = models.ForeignKey('config.Device', on_delete=models.CASCADE)

requirements-test.txt

@@ -2,3 +2,4 @@ coverage
 coveralls
 isort
 flake8
+mock-ssh-server>=0.5.0,<0.6.0