A listener to log information about tags

tag_logger.js

// features/step_definitions/tag_logger.js

function TagLogger() {
  var tags = {};

  this.hear = function (event, callback) {
    var eventName = event.getName();
    switch (eventName) {

    case 'BeforeScenario':
      var scenario = event.getPayloadItem('scenario');
      scenario.getTags().forEach(function (tag) {
        var tagName = tag.getName();
        tags[tagName] = (tags[tagName] || 0) + 1;
      });
      break

    case 'AfterFeatures':
      console.log("All tags:", tags);
    }

    callback();
  };
}

module.exports = function () {
  this.registerListener(new TagLogger())
};