Vending Machine Class in JavaScript

Vending Machine Class is to implement a vending machine, include functions such as showing invenotories, refill inventories, dispense inventory and return changes, by using the Test Driven Development (TDD) process.

Install

run npm

npm install

run the test

npm run test

Technology Used

-JavaScript -jest test

Test Result

12 tests in total:

Tests and Functions

1. get all the products status in stock and return the data

getAllProductInventory()

2. by provding the position (eg. A1) reture the number of the product in stock

getProductInventoryByPosition(position)

3. get all the changes/coins status in stock and return the data

getChangeInventory()

4. by provding the name (eg. loonies) reture the number of the loonies in stock

getChangeInventoryByName("loonies")

5. by provding the name (eg. loonies) reture the value of the loonies (which is 1)

getChangeValueByName("loonies")

6. increase or decrease number of inventories for a specific product, by providing product position and number need change, throw error when over the max spot avalible

setProductInventory("A1", 2)
setProductInventory("A1", -2)

7. change different product for the position, need to pass the new product's name, price , inventory number and maxinventory and return the new product status for that position

setNewProductToPosition("D2", "coke22", 14, 6, 10)

8. dispense changes back to customer as the fewest numbers of coins and bills. testing the original amount of changes need to return need to be equal to the sum of the dispensed changes and decrease the number of coins/bills gaven from the change inventory when then coins or bills are no instock use alternative, if cant find alternative, then throw error "changes out of stock"

dispenseChanges()

9. dispense product when customer insert enough payment, product is in stock and changes are avalible

dispenseProduct("A1", 5)