@nbamford123/arwes/src/tools/createLoader/index.test.js

Futuristic Sci-Fi and Cyberpunk Graphical User Interface Framework for Web Apps

import createLoader from './index';

describe('createLoader', function () {

  it('Should load and resolve when all assets provided are loaded', function () {
    const loader = createLoader({
      loadImage: () => Promise.resolve(),
      loadSound: () => Promise.resolve(),
    });
    return loader.load({
      images: [1, 2, 3],
      sounds: [1, 2, 3]
    });
  });

  it('Should load and reject when at least one assets provided is not loaded', function () {
    const loader = createLoader({
      loadImage: () => Promise.resolve(),
      loadSound: (asset) => asset === 2 ? Promise.reject() : Promise.resolve(),
    });
    return loader.load({
      images: [1, 2, 3],
      sounds: [1, 2, 3]  // The `2` will fail to load
    }).then(() => {
      return Promise.reject('Should have failed at load sound 2');
    }, () => {
      // Everything is ok
    });
  });

  it('Should reject when timeout', function () {
    const loader = createLoader({
      loadImage: () => new Promise(() => {}),  // Load images will never resolve
      loadSound: () => Promise.resolve(),  // Load sounds will resolve
    });
    return loader.load({
      images: [1, 2, 3],
      sounds: [1, 2, 3]
    }, {
      timeout: 100
    }).then(() => {
      return Promise.reject('Should have failed by timeout');
    }, () => {
      // Everything is ok
    });
  });

});