mocha/lib/reporters/json-stream.js

'use strict';

/**
 * Module dependencies.
 */

var Base = require('./base');
var JSON = require('json3');

/**
 * Expose `List`.
 */

exports = module.exports = List;

/**
 * Initialize a new `List` test reporter.
 *
 * @api public
 * @param {Runner} runner
 */
function List (runner) {
  Base.call(this, runner);

  var self = this;
  var total = runner.total;

  runner.on('start', function () {
    console.log(JSON.stringify(['start', { total: total }]));
  });

  runner.on('pass', function (test) {
    console.log(JSON.stringify(['pass', clean(test)]));
  });

  runner.on('fail', function (test, err) {
    test = clean(test);
    test.err = err.message;
    test.stack = err.stack || null;
    console.log(JSON.stringify(['fail', test]));
  });

  runner.on('end', function () {
    process.stdout.write(JSON.stringify(['end', self.stats]));
  });
}

/**
 * Return a plain-object representation of `test`
 * free of cyclic properties etc.
 *
 * @api private
 * @param {Object} test
 * @return {Object}
 */
function clean (test) {
  return {
    title: test.title,
    fullTitle: test.fullTitle(),
    duration: test.duration,
    currentRetry: test.currentRetry()
  };
}