code: function Chimp(options) {
  
    this.chokidar = chokidar;
    this.options = options || {};
    this.processes = [];
    this.isInterrupting = false;
    this.exec = require('child_process').exec;
    this.fs = fs;
    this.testRunnerRunOrder = [];
    this.watcher = undefined;
  
    // store all cli parameters in env hash
    // Note: Environment variables are always strings.
    for (var option in options) {
      if (option === 'ddp') {
        handleDdpOption(options);
      } else {
        process.env['chimp.' + option] = _.isObject(options[option]) ?
         JSON.stringify(options[option]) :
         String(options[option]);
      }
    }
  
    this._handleChimpInterrupt();
  }
docs: Chimp Constructor
  
  Options:
  - `browser` browser to run tests in
  
  @param {Object} options
  @api public