Transactions Processor

We want to develop a new transactions processor library to complete online payments. TransactionProcessor.js file contains the code scaffolding of our new payments engine.

Your tasks

Have a look to the code. Do you miss any class?
Complete ./src/TransactionProcessor.js class.
Make sure all tests pass. Would you include more tests?
Do you know the pattern used by TransactionProcessor class?

We strongly recommend the use of: map, filter and reduce (among others).

You can use app.js file to play with TransactionProcessor class.

Considerations

Valid operations

Here you can find all array operations

The following operations are forbidden:

for
foreach
while

Valid transactions

A valid transaction must have:

A float number non-negative amount value (amount >= 0).
One brand of: { "visa", "mastercard", "amex" }, lowercase.
One currency of: { "EUR", "GBP", "USD" }, uppercase.
An ID greater than zero integer value (id > 0).

How to set up the project

To run the project, open a terminal and execute the following command from project root path:

Install dependencies

yarn

Run the application

yarn start

Run tests