#NEWLINE# def test_has( ) : #NEWLINE# #INDENT# ( a , b , c ) = symbols ( 'a, b, c' , cls = Dummy ) #NEWLINE# f = Hyper_Function ( [ 2 , ( - c ) ] , [ b ] ) #NEWLINE# assert f . has ( a ) #NEWLINE# assert f . has ( Tuple ( b ) ) #NEWLINE# assert ( not f . has ( c ) )