image-sequencer/test/modules/image-manip.js

'use strict';

var test = require('tape');
var looksSame = require('looks-same');
var DataURItoBuffer = require('data-uri-to-buffer');

// We should only test headless code here.
// http://stackoverflow.com/questions/21358015/error-jquery-requires-a-window-with-a-document#25622933

require('../../src/ImageSequencer.js');

//require image files as DataURLs so they can be tested alike on browser and Node.
var sequencer = ImageSequencer({ ui: false });

var qr = require('./images/IS-QR.js');
var test_png = require('./images/test.png.js');
var test_gif = require('./images/test.gif.js');

sequencer.loadImages(test_png);
sequencer.addSteps(['invert', 'invert']);

test("Preload", function(t) {
  sequencer.run({ mode: 'test' }, function() {
    t.end();
  });
});

test("Inverted image isn't identical", function(t) {
  var step1 = sequencer.images.image1.steps[0].output.src;
  var step2 = sequencer.images.image1.steps[1].output.src;
  step1 = DataURItoBuffer(step1);
  step2 = DataURItoBuffer(step2);
  looksSame(step1, step2, function(err, res) {
    if (err) console.log(err);
    t.equal(res, false);
    t.end();
  });
});

test("Twice inverted image is identical to original image", function(t) {
  var step1 = sequencer.images.image1.steps[0].output.src;
  var step3 = sequencer.images.image1.steps[2].output.src;
  step1 = DataURItoBuffer(step1);
  step3 = DataURItoBuffer(step3);
  looksSame(step1, step3, function(err, res) {
    if (err) console.log(err);
    t.equal(res, true);
    t.end();
  });
});

test("Decode QR module works properly :: setup", function(t) {
  sequencer.loadImage(qr, function() {
    this.addSteps('decode-qr').run({ mode: 'test' }, function() {
      t.end();
    });
  })
});

test("Decode QR module works properly :: teardown", function(t) {
  t.equal("http://github.com/publiclab/image-sequencer", sequencer.images.image2.steps[1].output.data);
  t.end();
});

test("PixelManipulation works for PNG images", function(t) {
  sequencer.loadImages(test_png, function() {
    this.addSteps('invert').run({ mode: 'test' }, function(out) {
      t.equal(1, 1)
      t.end();
    });
  });
});

test("PixelManipulation works for GIF images", function(t) {
  sequencer.loadImages(test_gif, function() {
    this.addSteps('invert').run({ mode: 'test' }, function(out) {
      t.equal(1, 1)
      t.end();
    });
  });
});