This is a pairing exercise for prospective full-stack/back-end developers with a focus on Python.
The candidate can guide the exercise and do as much as is feasible within the time limit (~30-35 mins).
The candidate can choose to use any tools, IDEs and editors they like and is expected to have some setup to be able to write Python code.
The pairing exercise is going to be run following Test-Driven Development (TDD). The candidate doesn't need to have previous TDD experience, but some understanding of what it is at high level can be helpful.
The main idea is to start by writing a failing test with the expected behaviour of the code, and then work on it until the test passes.
Process a list of invoices and produce the following statistics:
- Total number of invoices per organisation
- Number of unpaid invoices per organisation
- Number of overdue invoices per organisation
- Number of paid invoices per organisation per month
The exercise should not require the use of external dependencies except for pytest to run the tests.
If using pipenv:
pipenv install --devpipenv run pytest
Alternatively, if pipenv is not installed:
pip install pytest