#NEWLINE# def test_popMultiple( self ) : #NEWLINE# #INDENT# '\n        L{_ExecutionContext.pop} cancels the last L{_ExecutionContext.push},\n        resulting in current context being whatever was pushed before that.\n        ' #NEWLINE# ctx = _ExecutionContext ( ) #NEWLINE# a = object ( ) #NEWLINE# b = object ( ) #NEWLINE# ctx . push ( b ) #NEWLINE# ctx . push ( b ) #NEWLINE# ctx . pop ( ) #NEWLINE# self . assertIs ( ctx . current ( ) , a )