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

examples/test/test_sshd.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+
+"""TEST"""
+
+import unittest
+import pexpect
+from time import sleep
+from mininet.log import setLogLevel
+from mininet.clean import cleanup, sh
+
+class testBareSSHD( unittest.TestCase ):
+    "Test ping with single switch topology (common code)."
+
+    opts = [ '\(yes/no\)\?', 'refused', 'Welcome', pexpect.EOF, pexpect.TIMEOUT ]
+
+    def connected( self, ip ):
+        "check connected"
+        p = pexpect.spawn( 'ssh -i /tmp/ssh/test_rsa %s' % ip )
+        while True:
+            index = p.expect( self.opts )
+            if index == 0:
+                print p.match.group(0)
+                p.sendline( 'yes' )
+            elif index == 1:
+                return False
+            elif index == 2:
+                p.sendline( 'exit' )
+                p.wait()    
+                return True
+            else:
+                return False
+
+    def setUp( self ):
+        # create public key pair for testing
+        sh( 'mkdir /tmp/ssh' )
+        sh( "ssh-keygen -t rsa -P '' -f /tmp/ssh/test_rsa" )
+        sh( 'cat /tmp/ssh/test_rsa.pub >> /tmp/ssh/authorized_keys' )
+        cmd = ( 'python -m mininet.examples.sshd -D '
+                '-o AuthorizedKeysFile=/tmp/ssh/authorized_keys '
+                '-o StrictModes=no' )
+        self.net = pexpect.spawn( cmd )
+        self.net.expect( 'mininet>' )
+
+    def testSSH( self ):
+        for h in range( 1, 5 ):
+            self.assertTrue( self.connected( '10.0.0.%d' % h ) )
+
+    def tearDown( self ):
+        self.net.sendline( 'exit' )
+        self.net.wait()
+        # remove public key pair
+        sh( 'rm -rf /tmp/ssh' )
+
+if __name__ == '__main__':
+    setLogLevel( 'warning' )
+    unittest.main()
+