drewlyton / st-reimbursement-exercise

Simple Thread Technical Exercise

This repository is a container for the technical exercise given to me for my job application to Simple Thread. It is written in Typescript and tested with Jest.

Goal

Given a set of projects, calculate the reimbursement amount for the set.

Rules

• First and last days of projects/sets are travel days
• Middle days are full days
• Gap days should not be billed
• Days on the ends of gaps between projects are travel days
• Projects that touch or overlap days are full days
• Days are only ever counted once
• Projects are in either high or low cost cities
• Days should be counted to maximize reimbursement total

Rates

	full	travel
high cost	$85 / day	$55 / day
low cost	$75 / day	$45 / day

Running the code

To run the project and calculate reimbursement for the 4 given sets in the /data folder, first install the necessary dependencies.

npm install

Note: If you get an error that dependencies couldn't be installed correctly, make sure the version of Node you're running is v14.16.0 or later. You can do this easily if you have nvm installed by running nvm i.

Run using Jest

If you'd like to just run the tests in the test-file using Jest, you can run:

npm run test

or

jest

Run using build script

If you'd like to just see a printout of the results from testing the given data-sets, I created a build script that does just that. You can run it with the following command:

npm run calc

Related Info

Type definitions

ProjectData: {
    cityCost: bool (true is high cost | false is low cost);
    startDate: string (in month/day/year format);
    endDate: string (in month/day/year format);
}

Testing Sets

Set 1

Should calculate to 165

[
    {
        cityCost: false,
        startDate: 9/1/15,
        endDate: 9/3/15
    }
]

Set 2

Should calculate to 620

[
    {
        cityCost: false,
        startDate: 9/1/15,
        endDate: 9/1/15
    },
    {
        cityCost: true,
        startDate: 9/2/15,
        endDate: 9/6/15
    },
    {
        cityCost: false,
        startDate: 9/6/15,
        endDate: 9/8/15
    }
]

Set 3

Should calculate to 475

[
    {
        cityCost: false,
        startDate: 9/1/15,
        endDate: 9/3/15
    },
    {
        cityCost: true,
        startDate: 9/5/15,
        endDate: 9/7/15
    },
    {
        cityCost: true,
        startDate: 9/8/15,
        endDate: 9/8/15
    }
]

Set 4

Should calculate to 215

[
    {
        cityCost: false,
        startDate: 9/1/15,
        endDate: 9/1/15
    },
    {
        cityCost: false,
        startDate: 9/1/15,
        endDate: 9/1/15
    },
    {
        cityCost: true,
        startDate: 9/2/15,
        endDate: 9/2/15
    },
    {
        cityCost: true,
        startDate: 9/2/15,
        endDate: 9/3/15
    }
]