Unit Testing Functions

Unit testing in your app should be reserved for testing individual, standalone functions (i.e., "units" of code). To unit test a function, the test.load() method can be utilized:

import test from '@joystick.js/test';

test.that('add function adds two numbers together', async (assert = {}) => {
  const add = await test.load('lib/add.js', { default: true });
  assert.is(add(5, 5), 10);
});

Above, we've utilized the test.load() method to dynamically import a function we want to unit test in our app /lib/add.js. When we call test.load() a dynamic import of that path is performed. Because we expect /lib/add.js to export the add() function as a default export, we pass { default: true } as the second argument to test.load() to ensure that we're handed back the default export and not an object like { default: [Function add] }.

API Reference

test.load()

Function API

test.load(path: string, options: object) => Promise;

Arguments