docs: function JSONStream(runner, options) {
    Base.call(this, runner, options);
  
    var self = this;
    var total = runner.total;
  
    runner.once(EVENT_RUN_BEGIN, function() {
      writeEvent(['start', {total: total}]);
    });
  
    runner.on(EVENT_TEST_PASS, function(test) {
      writeEvent(['pass', clean(test)]);
    });
  
    runner.on(EVENT_TEST_FAIL, function(test, err) {
      test = clean(test);
      test.err = err.message;
      test.stack = err.stack || null;
      writeEvent(['fail', test]);
    });
  
    runner.once(EVENT_RUN_END, function() {
      writeEvent(['end', self.stats]);
    });
  }