Use intern.io to iterate and click elements sequentially

intern.snippet.js

// uses when
// reduce and when suggested https://gist.github.com/michaelwills/f362e2368422f80ea831#comment-1454585
var when = require('intern/dojo/promise/when');

// snippet from previous this.remote sequence
this.remote
.findAllByCssSelector('.tile')
.then(function onTileImages(tiles) {
  return tiles.reduce(function iterTiles(prev, tile) {
    return when(prev)
      .then(function iterTile() {
        return tile.click()
          .then(function () { return remote.pressKeys('\uE00C'); })
          .then(function () { return remote.sleep(500); });
      });
  }, null);
})
.end();

.findAllByCssSelector('.tile')
.then(function (tiles) {
  return tiles.reduce(function (prev, tile) {
    return when(prev)
    .then(function () {
        return tile.click()
        .then(function () { return remote.pressKeys('\uE00C'); })
        .then(function () { return remote.sleep(500); });
    });
  }, null);
});

Thanks @neoonstalwart!