[fix] OpenWISP1: Added fallback value for hostname in _get_install_co…

…ntext

netjsonconfig/backends/openwisp/openwisp.py

@@ -79,7 +79,7 @@ def _get_install_context(self):
                 break
         # return context
         return dict(
-            hostname=config['general']['hostname'],  # hostname is required
+            hostname=config.get('general', {}).get('hostname', 'OpenWISP1'),
             l2vpn=l2vpn,
             bridges=bridges,
             radios=config.get('radios', []),  # radios might be empty

tests/openwisp/test_backend.py

@@ -3,6 +3,7 @@
 from copy import deepcopy
 from hashlib import md5
 from time import sleep
+from unittest.mock import patch
 
 from netjsonconfig import OpenWisp
 from netjsonconfig.exceptions import ValidationError
@@ -123,6 +124,17 @@ def test_hostname_required(self):
         with self.assertRaises(ValidationError):
             o.validate()
 
+    @patch.object(OpenWisp, 'validate')
+    def test_fallback_hostname(self, *args):
+        config = deepcopy(self.config)
+        del config['general']['hostname']
+        o = OpenWisp(config)
+        tar = tarfile.open(fileobj=o.generate(), mode='r')
+        install = tar.getmember('install.sh')
+        contents = tar.extractfile(install).read().decode()
+        self.assertIn('echo "Changing hostname"', contents)
+        self.assertIn('echo "OpenWISP1" > /proc/sys/kernel/hostname', contents)
+
     def test_install_script(self):
         config = deepcopy(self.config)
         o = OpenWisp(config)