const test = require('tape'),
  base64Img = require('base64-img');

const ImageSequencer = require('../../../src/ImageSequencer');

const test_gif = require('../images/test.gif.js');
target = 'test_outputs';

/**
 * @method ModuleTest.
 * @description a common test for modules.
 * @param {String} moduleName name of the module.
 * @param {"Object"} options module options.
 * @param {String} benchmark dataURI of the benchmark gif.
 * @param {String} [input="test_gif"] optional input image. Default is a test gif.
 */
module.exports = (moduleName, options, benchmark, input) => {
  let sequencer = ImageSequencer({ui: false});
  sequencer.loadImages(input || test_gif);
  sequencer.addSteps(moduleName, options);
  test(`${moduleName} module works correctly`, t => {
    sequencer.run({mode: 'test'}, () => {
      let result = sequencer.steps[1].output.src;

      base64Img.imgSync(result, target, `${moduleName}-result`);
      base64Img.imgSync(benchmark, target, `${moduleName}-benchmark`);

      t.equal(result === benchmark, true, `${moduleName} module works correctly with Gif`);
      sequencer = null;
      t.end();
    });
  });
};