adding first draft of tests for all examples, they need comments and clean up, some could be made more rebust

examples/test/test_multiping.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+
+"""TEST"""
+
+import unittest
+import pexpect
+from collections import defaultdict
+from mininet.log import setLogLevel
+
+class testMultiPing( unittest.TestCase ):
+    "Test ping with single switch topology (common code)."
+
+    def testMultiPing( self ):
+        p = pexpect.spawn( 'python -m mininet.examples.multiping' )
+        opts = []
+        opts.append( "Host (h\d+) \(([\d.]+)\) will be pinging ips: ([\d. ]+)" )
+        opts.append( "(h\d+): ([\d.]+) -> ([\d.]+) \d packets transmitted, (\d) received" )
+        opts.append( pexpect.EOF )
+        pings = defaultdict( list )
+        while True:
+            index = p.expect( opts )
+            if index == 0:
+                name = p.match.group(1)
+                ip = p.match.group(2)
+                targets = p.match.group(3).split()
+                pings[ name ] += targets
+            elif index == 1:
+                name = p.match.group(1)
+                ip = p.match.group(2)
+                target = p.match.group(3)
+                received = int( p.match.group(4) )
+                if target == '10.0.0.200':
+                    self.assertEqual( received, 0 )
+                else:
+                    self.assertEqual( received, 1 )
+                try:
+                    pings[ name ].remove( target )
+                except:
+                    pass
+            else:
+                break
+        self.assertTrue( len(pings) > 0 )
+        for t in pings.values():
+            self.assertEqual( len( t ), 0 )
+
+if __name__ == '__main__':
+    setLogLevel( 'warning' )
+    unittest.main()