Why a Take-Home Test

We took this test from another company (Inato) to prove our candidates this is not work we could use in our codebase.

We believe our tech team must have a strong common culture.

In order to asses we work the same way we need to discuss the practice of the candidate.

In order to discuss the practice of the candidate, we need code, examples. A pull request is the best piece of work we found.

This exercise leads most of the time to an interview. Unless the level is not what we expected, we will send you a detailled response about what we judged is not acceptable in our team.

We hope the candidate will take pleasure doing this exercise, from the rookie to the senior. We believe this exercise is a kind of kata, a simple problem that allows someone to explore deep engineering concepts.

Inato Take-Home Test Specification

You are a new developer in the Inato team, and your first job is to add a feature to an old existing piece of code. We recommend spending between 1 hour and 2 hours on the exercise. (Do more if you like 😇, do less if you think you've shown what you want😎)

System specifications

Hi and welcome to the team. We are in the future, and Inato has extended its activities by opening a pharmacy. Your task is to add a new feature to our system so that we can begin distributing a new drug. First an introduction to our system:

• All drugs have an expiresIn value which denotes the number of days we have until the item expires.
• All drugs have a benefit value which denotes how powerful the drug is.
• At the end of each day our system lowers both values for every drug

But there is more:

• Once the expiration date has passed, Benefit degrades twice as fast.
• The Benefit of an item is never negative.
• "Herbal Tea" actually increases in Benefit the older it gets. Benefit increases twice as fast after the expiration date.
• The Benefit of an item is never more than 50.
• "Magic Pill" never expires nor decreases in Benefit.
• "Fervex", like Herbal Tea, increases in Benefit as its expiration date approaches. Benefit increases by 2 when there are 10 days or less and by 3 when there are 5 days or less but Benefit drops to 0 after the expiration date.

We have recently signed a supplier of "Dafalgan". This requires an update to our system:

• "Dafalgan" degrades in Benefit twice as fast as normal drugs.

Instructions

• Fork this repository
• Implement the required feature
• Publish it on GitHub as a pull-request
• Send us the link and tell us approximatively how much time you spent on this assignment

You are encouraged to refactor the existing code before adding your own, as you would do if this was a real task in real life. We strongly recommend that you write tests to help you during this process.

Feel free to make any changes to the updateBenefitValue method implementation and add any new code as long as everything still works correctly. However, do not break the public API of the Drug and Pharmacy classes, as those are used by other pieces of the software (you can add new methods though).

Please commit as frequently as possible to make the review easier.

Test

To make sure that you will not break anything in the existing code, we added a log of the simulation in the output.txt file. Make sure that your code is able to generate the same file. You can generate a new file by running one of the following commands:

yarn start

docker-compose up