#NEWLINE# def but_replaces_xlsx_blob_when_part_exists( self , update_blob_fixture ) : #NEWLINE# #INDENT# ( chart_data , xlsx_blob_ ) = update_blob_fixture #NEWLINE# chart_data . update_from_xlsx_blob ( xlsx_blob_ ) #NEWLINE# assert ( chart_data . xlsx_part . blob is xlsx_blob_ )