+ self.assertRaises( ValueError, samfile.getrname, 0 )
+ self.assertRaises( ValueError, samfile.tell )
+ self.assertRaises( ValueError, samfile.write, None )
+ self.assertRaises( ValueError, samfile.seek, 0 )
+ self.assertRaises( ValueError, getattr, samfile, "nreferences" )
+ self.assertRaises( ValueError, getattr, samfile, "references" )
+ self.assertRaises( ValueError, getattr, samfile, "lengths" )
+ self.assertRaises( ValueError, getattr, samfile, "text" )
+ self.assertRaises( ValueError, getattr, samfile, "header" )