code: async function quickLaunch (udid, appPath = path.resolve(__dirname, '..', '..', 'assets', 'TestApp.app')) {
    let traceTemplatePath = await xcode.getAutomationTraceTemplatePath();
    let scriptPath = path.resolve(__dirname, '..', '..', 'assets', 'blank_instruments_test.js');
    let traceDocument = path.resolve('/', 'tmp', 'testTrace.trace');
    let resultsPath = path.resolve('/', 'tmp');
  
    // the trace document can be in a weird state
    // but we never do anything with it, so delete
    await fs.rimraf(traceDocument);
  
    let args = [
      'instruments',
      '-D', traceDocument,
      '-t', traceTemplatePath,
      '-w', udid,
      appPath,
      '-e', 'UIASCRIPT', scriptPath,
      '-e', 'UIARESULTSPATH', resultsPath];
    log.debug(`Running command: 'xcrun ${args.join(' ')}'`);
    await exec('xcrun', args);
  }
docs: this function launches an instruments test with a default test that immediately passes. In this way we can start a simulator and be notified when it completely launches