Basic Credit Card Processing

This program will add new credit card accounts, process charges and credits against them, and display summary information.

Design Descisions

• A major design principle I attempted to communicate in this task is that "simple is better". I understood that since this was a standard read and write of input, there was no need for an actual database for long term storage.
• I proceeded to mimic a database model using python, this kept my logic simple, precise and clear.
• I chose to use python because of the simplicity and accessibility it provides and because of my familiarity and comfort with the language.

Technologies Used

• Python 3 and a few of its inbuilt libraries.

How to Run the program

Test with txt file

• To run the program with a txt file, in the root of the working directory, run python3 main.py file_name.txt (please ensure your file is in the root directory also, or specify the path e.g python3 main.py path_to_file/file_name.txt), there is also a test txt file available named data.txt, you can run python3 main.py data.txt to test with that.

Test with input

• To run the program with direct input, run python3 main.py and paste or write all your transactions and then CTRL-D (Mac) or CTRL-Z followed by <return> (Windows) to signify End of File or Writing.

How to Run tests

• To run tests use the command python3 -m unittest discover or python3 -m unittest test_program.py