getBoundingClientRect: function(selector, callback) {
  var webdriverio = this._webdriverio;

  webdriverio.getElementSize(selector)
      .then(function(size) {

        webdriverio.getLocation(selector)
            .then(function(location) {

              var rect = {
                width: size.width,
                height: size.height,
                top: location.y,
                left: location.x,
                bottom: location.y + size.height,
                right: location.x + size.width
              };

              callback(null, rect);
            })
            .catch(function(error) {
              callback(error);
            });
      })
      .catch(function(error) {
        callback(error);
      });
}