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

examples/test/test_multitest.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+
+"""TEST"""
+
+import unittest
+import pexpect
+from mininet.log import setLogLevel
+
+class testMultiTest( unittest.TestCase ):
+    "Test ping with single switch topology (common code)."
+
+    prompt = 'mininet>'
+
+    def testMultiTest( self ):
+        p = pexpect.spawn( 'python -m mininet.examples.multitest' )
+        p.expect( '(\d+)% dropped' )
+        dropped = int( p.match.group(1) )
+        self.assertEqual( dropped, 0 )
+        ifCount = 0
+        while True:
+            index = p.expect( [ 'h\d-eth0', self.prompt ] )
+            if index == 0:
+                ifCount += 1
+            elif index == 1:
+                p.sendline( 'exit' )
+                break
+        p.wait()
+        self.assertEqual( ifCount, 4 )
+
+if __name__ == '__main__':
+    setLogLevel( 'warning' )
+    unittest.main()