Tech test for a position of a Software Engineer at some company. My code is in the identity directory. The task had a set of failing tests and the goal was to change the code until they all started passing.

Identity Service

FX Labs has many different systems generating currency trades. So that our clients can look up individual trades easily, we want to assign each trade its own unique 7 character alphanumeric human readable ID.

Example: B762F00

This package will be used by an API to create new IDs on demand.

Setup

You will need a Python environment with the package requirements installed.

To set this up using virtualenv, run:

$ virtualenv -p python3 venv
$ source venv/bin/activate
$ pip3 install -r requirements.txt

You can run the tests with:

$ python -m pytest

Task

This repo contains tests for the ID generation code, the task is to make these tests pass.

The tests in master will run uniqueness and simple format checks.

After you have made these tests pass, please commit your changes to the master branch.

There are further branches with more tests. Merge one branch at a time into master, then make the tests from that branch pass, and commit your changes to master.

The branches are:

origin/bulk-generation - adds tests for a bulk generation function to generate many IDs at once, and improves the uniqueness and formatting tests.

origin/concurrency - tests that the code can handle many concurrent requests.

origin/persistence-and-fault-tolerance - tests that the code can recover from crashes and restarts without duplicating IDs.

Your aim is to make as many of the tests pass as possible within 3 hours.

Once you have finished, please create a git bundle to send back to us with this command:

$ git bundle create repo.bundle --all

Good luck!