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103 lines
3.6 KiB
Python
103 lines
3.6 KiB
Python
#!/usr/bin/env python
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"""Package: mininet
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Regression tests for switch dpid assignment."""
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import unittest
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import sys
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from mininet.net import Mininet
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from mininet.node import Host, Controller
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from mininet.node import ( UserSwitch, OVSSwitch, IVSSwitch )
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from mininet.topo import Topo
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from mininet.log import setLogLevel
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from mininet.util import quietRun
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from mininet.clean import cleanup
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class TestSwitchDpidAssignmentOVS( unittest.TestCase ):
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"Verify Switch dpid assignment."
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switchClass = OVSSwitch # overridden in subclasses
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def tearDown( self ):
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"Clean up if necessary"
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# satisfy pylint
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assert self
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if sys.exc_info() != ( None, None, None ):
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cleanup()
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def testDefaultDpid( self ):
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"""Verify that the default dpid is assigned using a valid provided
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canonical switchname if no dpid is passed in switch creation."""
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net = Mininet( Topo(), self.switchClass, Host, Controller )
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switch = net.addSwitch( 's1' )
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self.assertEqual( switch.defaultDpid(), switch.dpid )
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net.stop()
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def dpidFrom( self, num ):
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"Compute default dpid from number"
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fmt = ( '%0' + str( self.switchClass.dpidLen ) + 'x' )
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return fmt % num
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def testActualDpidAssignment( self ):
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"""Verify that Switch dpid is the actual dpid assigned if dpid is
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passed in switch creation."""
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dpid = self.dpidFrom( 0xABCD )
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net = Mininet( Topo(), self.switchClass, Host, Controller )
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switch = net.addSwitch( 's1', dpid=dpid )
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self.assertEqual( switch.dpid, dpid )
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net.stop()
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def testDefaultDpidAssignmentFailure( self ):
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"""Verify that Default dpid assignment raises an Exception if the
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name of the switch does not contain a digit. Also verify the
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exception message."""
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net = Mininet( Topo(), self.switchClass, Host, Controller )
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with self.assertRaises( Exception ) as raises_cm:
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net.addSwitch( 'A' )
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self.assertTrue( 'Unable to derive '
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'default datapath ID - please either specify a dpid '
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'or use a canonical switch name such as s23.'
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in str( raises_cm.exception ) )
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net.stop()
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def testDefaultDpidLen( self ):
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"""Verify that Default dpid length is 16 characters consisting of
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16 - len(hex of first string of contiguous digits passed in switch
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name) 0's followed by hex of first string of contiguous digits passed
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in switch name."""
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net = Mininet( Topo(), self.switchClass, Host, Controller )
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switch = net.addSwitch( 's123' )
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self.assertEqual( switch.dpid, self.dpidFrom( 123 ) )
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net.stop()
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class OVSUser( OVSSwitch):
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"OVS User Switch convenience class"
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def __init__( self, *args, **kwargs ):
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kwargs.update( datapath='user' )
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OVSSwitch.__init__( self, *args, **kwargs )
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class testSwitchOVSUser( TestSwitchDpidAssignmentOVS ):
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"Test dpid assignment of OVS User Switch."
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switchClass = OVSUser
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@unittest.skipUnless( quietRun( 'which ivs-ctl' ),
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'IVS switch is not installed' )
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class testSwitchIVS( TestSwitchDpidAssignmentOVS ):
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"Test dpid assignment of IVS switch."
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switchClass = IVSSwitch
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@unittest.skipUnless( quietRun( 'which ofprotocol' ),
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'Reference user switch is not installed' )
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class testSwitchUserspace( TestSwitchDpidAssignmentOVS ):
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"Test dpid assignment of Userspace switch."
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switchClass = UserSwitch
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if __name__ == '__main__':
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setLogLevel( 'warning' )
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unittest.main()
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cleanup()
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