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]));
  });
}
Initialize a new `List` test reporter.

@api public
@param {Runner} runner