cleaned up and commented test_bind.py; added one new test

examples/test/test_bind.py

 #!/usr/bin/env python
 
-"""TEST"""
+"""
+Tests for bind.py
+"""
 
 import unittest
 import pexpect
-from time import sleep
-from mininet.log import setLogLevel
-from mininet.clean import cleanup, sh
 
 class testBind( unittest.TestCase ):
-    "Test ping with single switch topology (common code)."
 
     prompt = 'mininet>'
 
-    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 ):
         self.net = pexpect.spawn( 'python -m mininet.examples.bind' )
         self.net.expect( "Private Directories: \[([\w\s,'/]+)\]" )
@@ -41,11 +22,39 @@ def setUp( self ):
         self.assertTrue( len( self.directories ) > 0 )
 
     def testCreateFile( self ):
+        "Create a file, a.txt, in the first private directory and verify"
         fileName = 'a.txt'
         directory = self.directories[ 0 ]
-        self.net.sendline( 'h1 touch %s/%s; ls %s' % ( directory, fileName, directory ) )
+        path = directory + '/' + fileName
+        self.net.sendline( 'h1 touch %s; ls %s' % ( path, directory ) )
         index = self.net.expect( [ fileName, self.prompt ] )
         self.assertTrue( index == 0 )
+        self.net.expect( self.prompt )
+        self.net.sendline( 'h1 rm %s' % path )
+        self.net.expect( self.prompt )
+
+    def testIsolation( self ):
+        "Create a file in two hosts and verify that contents are different"
+        fileName = 'b.txt'
+        directory = self.directories[ 0 ]
+        path = directory + '/' + fileName
+        contents = { 'h1' : '1', 'h2' : '2' }
+        # Verify file doesn't exist, then write private copy of file
+        for host in contents:
+            value = contents[ host ]
+            self.net.sendline( '%s cat %s' % ( host, path ) )
+            self.net.expect( 'No such file' )
+            self.net.expect( self.prompt )
+            self.net.sendline( '%s echo %s > %s' % ( host, value, path ) )
+            self.net.expect( self.prompt )
+        # Verify file contents
+        for host in contents:
+            value = contents[ host ]
+            self.net.sendline( '%s cat %s' % ( host, path ) )
+            self.net.expect( value )
+            self.net.expect( self.prompt )
+            self.net.sendline( '%s rm %s' % ( host, path ) )
+            self.net.expect( self.prompt )
 
     # TODO: need more tests
 
@@ -54,6 +63,5 @@ def tearDown( self ):
         self.net.wait()
 
 if __name__ == '__main__':
-    setLogLevel( 'warning' )
     unittest.main()