Expect that tests may run without root privileges

Partially fixes #40
Merges #43

Author: frenzymadness

tests/test_ethtool.py

@@ -145,7 +145,13 @@ def _functions_accepting_devnames(self, devname):
                                      '[Errno 95] Operation not supported')
 
         self.assertIsInt(ethtool.get_sg(devname))
-        self.assertIsInt(ethtool.get_ufo(devname))
+
+        try:
+            self.assertIsInt(ethtool.get_ufo(devname))
+        except (OSError, IOError):
+            # This test may fail due to insufficient privileges
+            # That's IOError on 2.7, OSError (PermissionError) on 3
+            pass
 
         self.assertIsInt(ethtool.get_tso(devname))
 

tests/test_scripts.py

@@ -72,13 +72,21 @@ def test_show_coalesce_lo(self):
 
     def test_show_offload_lo(self):
         self.assertIsNone(peth.show_offload(loopback))
+
+        # Check if we have rights to obtain ufo and set proper expected output
+        try:
+            ethtool.get_ufo(loopback)
+            expected_ufo = 'on'
+        except (OSError, IOError):
+            expected_ufo = 'not supported'
+
         self.assertEqual(self._output(),
                          '''scatter-gather: on
 tcp segmentation offload: on
-udp fragmentation offload: on
+udp fragmentation offload: {expected_ufo}
 generic segmentation offload: on
 generic receive offload: on
-'''
+'''.format(expected_ufo=expected_ufo)
                          )
 
     # Tests for another device