filed_payments

author : Prashant Rana

email: uchiha.rana62@gmail.com

Coding exercise:

Write a Flask Web API with only 1 method called “ProcessPayment” that receives a request like this

-CreditCardNumber(mandatory, string, it should be a valid credit card number)
-CardHolder`: (mandatory, string)
-ExpirationDate (mandatory, DateTime, it cannot be in the past)
-SecurityCode (optional, string, 3 digits)
-Amount (mandatoy decimal, positive amount)

The response of this method should be 1 of the followings based on

-Payment is processed: 200 OK
-The request is invalid: 400 bad request
-Any error: 500 internal server error

The payment could be processed using different payment providers (external services)called:

-PremiumPaymentGateway
-ExpensivePaymentGateway
-CheapPaymentGateway.

The payment gateway that should be used to process each payment follows the next set of business rules:

a)If the amount to be paid is less than £20, use CheapPaymentGateway.
b)If the amount to be paid is £21-500, use ExpensivePaymentGateway if available. Otherwise, retry only once with CheapPaymentGateway.
c)If the amount is > £500, try only PremiumPaymentGateway and retry up to 3 times in case payment does not get processed.

How to run the project

Have pipenv installed in your system

run the following command to do so. 1. clone the project from git on your system

git clome https://github.com/sahasrara62/filed_payments.git

cd filed_payments
run command pipenv install
run to go in virtual environment, inside the project run command pipenv shell
run command to run the flask server flask run
To exit server run ctrl+c
To exit the virtual env run command in terminal deactivate

How to test the application

run the server first using above step
in seperate terminal, run cd application/test ie go to test folder
run comands: pytest test_external_payment.py

Shortcoming OR consideration