message: added test to ensure that `loadImages` loads all possible variations of all possible images
diff: 'use strict';
  const PassImages = require('../src/lib/images');
  +const path = require('path');
  describe('PassImages', () => {
  test('Class properties', () => {
  @@ -19,5 +20,14 @@ describe('PassImages', () => {
  expect(img.background3x).toBeUndefined();
  });
  - test('reading images from directory', () => {});
  + test('reading images from directory', async () => {
  + const img = new PassImages();
  + await img.loadFromDirectory(path.resolve(__dirname, '../images/'));
  + expect(img.map.size).toBe(6);
  + // ensure it loaded all dimensions for all images
  + for (const variations of img.map.values()) {
  + expect(variations).toBeInstanceOf(Map);
  + expect(variations.size).toBe(3);
  + }
  + });
  });
  