build.gradle

Process grailsTestAppProcess

test.doFirst {
  // Using the Grails wrapper to start the Grails application in the 'test' environment so the remote control
  // plugin is enabled and my remote util bean is injected from resources.groovy
  println "Starting grails app"

  String grailsRunAppCommand

  if (Os.isFamily(Os.FAMILY_WINDOWS)) {
    grailsRunAppCommand = "grailsw.bat test run-app"
  } else {
    grailsRunAppCommand = "./grailsw test run-app"
  }

  grailsTestAppProcess = execCommandAndWaitForStatusString(grailsRunAppCommand, 'Server running.')
}

/**
 * Credit for this method goes to Tomas Lin
 * http://fbflex.wordpress.com/2013/03/14/gradle-madness-execwait-a-task-that-waits-for-commandline-calls-to-be-ready/
 */
Process execCommandAndWaitForStatusString(String command, String readyStatusString) {
  ProcessBuilder builder = new ProcessBuilder(command.split(' '))
  builder.redirectErrorStream(true)
  builder.directory(new File("."))
  Process process = builder.start()

  InputStream processStdout = process.getInputStream()
  BufferedReader reader = new BufferedReader(new InputStreamReader(processStdout))

  def line
  while ((line = reader.readLine()) != null) {
    println line
    if (line.contains(readyStatusString)) {
      println "'${command}' is ready"
      break;
    }
  }

  process.consumeProcessOutput(System.out, System.err)

  return process
}

Shouldn't we reader.close?