sor

Sor is a tool for checking your answers to a collection of curated programming practice challenges. Pick a problem that you want to solve from sorjs.com, create a file with a function matching the specified name for the problem, and run:

sor your-file.js

Running the sor command downloads and runs a set of pre-configured tests for the problem that you specify. You'll receive output as the tests run indicating which tests pass and fail.

Note that each file can only contain a solution to a single problem.

Installation

Sor should be installed globally; run npm install -g sor and you should be set. You may need to run this command with administrator privileges if you haven't fixed npm permissions: sudo npm install -g sor.

Submitting new problems

The practice problem archive is built by its community. See our submission guidelines.

Mentor testing framework

Mentor is a simple framework for testing and providing feedback for function execution; it's similar in some ways to unit testing frameworks but is dramatically simplified and has some additional features that are targeted at providing more meaningful feedback in the context of practicing. You can see lots of examples of Mentor tests in the sorjs.com repository.

Mentor breaks tests into individual trials; reports are avaialble overall for tests and individually for each trial. There are two ways to test outcomes: produces() to test return values, or examine() to test more complex behaviors. You can provide feedback in the case of trial failure using the otherwise() function.

// If you're writing challenge tests for sorjs, make sure to use the SOR_MENTOR_PATH env variable
// instead of a local path. See other examples in the sorjs.com repository.
const runner = require('sor/mentor/runner');
 
// Example function
const add = (x, y) => x + y;
 
// Create a new test which will be composed of multiple trials. All trials will be targeted at the 
// add function. If we want to test another function, we should create another test.
const test = runner.test(add);
 
// Create a trial to test whether add(4, 5) gives us 9
test.trial(4, 5).produces(9); 
// Create a trial testing that add(-2, 3) === 1, and provide a tip if not
test.trial(-2, 3).produces(1).otherwise('Beware negative numbers!');
 
// Create a trial testing that add(6, 1) produces an odd number. Will evaluate to
// a success if the first and second argument to outcome() are the equivalent, or a failure otherwise.
test.trial(6, 1)
    .examine(fn => runner.outcome('odd number', fn() % 2 === 1 ? 'odd number' : 'even number'));
 
test.trial(0, 0)
    .examine(fn => runner.outcome('odd number', fn() % 2 === 1 ? 'odd number' : 'even number'))
    .otherwise('Do you properly handle zero?');