Function testImageRender

test/unit/image/loading.js:12–33

(file, sketch)

 * and checks that they are exactly the same. Sends result to the callback.
 */
var testImageRender = function(file, sketch) {
  sketch.loadPixels();
  var p = sketch.pixels;
  var ctx = sketch;

  sketch.clear();

  return new Promise(function(resolve, reject) {
    sketch.loadImage(file, resolve, reject);
  }).then(function(img) {
    ctx.image(img, 0, 0);

    ctx.loadPixels();
    var n = 0;
    for (var i = 0; i < p.length; i++) {
      var diff = Math.abs(p[i] - ctx.pixels[i]);
      n += diff;
    }
    var same = n === 0 && ctx.pixels.length === p.length;
    return same;
  });
};

suite('loading images', function() {
  const imagePath = '/test/unit/assets/cat.jpg';