cleaned up and commented test_limit.py

examples/test/test_limit.py

 #!/usr/bin/env python
 
-"""TEST"""
+"""
+Test for limit.py
+"""
 
 import unittest
 import pexpect
-from mininet.log import setLogLevel
 
 class testLimit( unittest.TestCase ):
-    "Test ping with single switch topology (common code)."
 
     def testLimit( self ):
+        "Verify that CPU limits are within a 1% tolerance of limit for each scheduler"
+        p = pexpect.spawn( 'python -m mininet.examples.limit' )
         opts = [ '\*\*\* Testing network ([\d\.]+) Mbps', 
                  '\*\*\* Results: \[([\d\., ]+)\]', 
                  pexpect.EOF ]
-        p = pexpect.spawn( 'python -m mininet.examples.limit' )
         count = 0
         bw = 0
         tolerance = 1
@@ -24,15 +25,14 @@ def testLimit( self ):
                 count += 1
             elif index == 1:
                 results = p.match.group( 1 )
-                for x in results.split(','):
+                for x in results.split( ',' ):
                     result = float( x )
                     self.assertTrue( result < bw + tolerance )
-                    self.assertTrue( result > bw - tolerance)
+                    self.assertTrue( result > bw - tolerance )
             else:
                 break
 
         self.assertTrue( count > 0 )
 
 if __name__ == '__main__':
-    setLogLevel( 'warning' )
     unittest.main()