rename to final CART_FILE
update file name
new Cart test file
add read cart file test
update getBarcodes function
fix code
add handleBarcodes test
rename countCart to handleBarcodes
update handle barcodes test
update handle barcodes test
delete useless code
add uniqueArray function
delete useless code
add getBarcodeTimes function
update handleBarcodes function
update handleBarcodes
update handleBarcodes
update App class
new Discount test file
add get promotions test