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ScalaTest is a free, open-source testing toolkit for Scala and Java programmers.
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/*
 * Copyright 2001-2013 Artima, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.scalatest

/**
 * Arguments bundle passed to four of ScalaTest's lifecycle methods: run, runNestedSuites,
 * runTests, and runTest.
 *
 * 
 * The signatures of these methods, defined in trait Suite, are:
 * 
 *
 *  * def run(testName: Option[String], args: Args)
 * def runNestedSuites(args: Args)
 * def runTests(testName: Option[String], args: Args)
 * def runTest(testName: String, args: Args)
 * 
 *
 * 
 * The purpose of bundling these arguments into an Args object instead of passing them in individually is to make the signature
 * of these four lifecycle methods easier to read, write, and remember, as well as to make the methods more pleasant to override in user code.
 * 
 * 
 * @param reporter the Reporter to which results will be reported
 * @param stopper the Stopper that will be consulted to determine whether to stop execution early.
 * @param filter a Filter with which to filter tests based on their tags
 * @param configMap a ConfigMap of key-value pairs that can be used by the executing Suite of tests.
 * @param distributor an optional Distributor, into which to put nested Suites to be executed
 *              by another entity, such as concurrently by a pool of threads. If None, nested Suites will be executed sequentially.
 * @param tracker a Tracker tracking Ordinals being fired by the current thread.
 * @param chosenStyles a (possibly empty) Set of Strings specifying the run's chosen styles
 * @param runTestInNewInstance a flag used to pass information between run methods
 *           in OneInstancePerTest and ParallelTestExecution.
 * @param distributedTestSorter an optional DistributedTestSorter used by ParallelTestExecution to sort the events
 *                              for the parallel-executed tests of one suite back into sequential order on the fly, with a timeout in case a test takes too long to complete
 * @param distributedSuiteSorter an optional DistributedSuiteSorter used by ParallelTestExecution to ensure the events
 *                              for the parallel-executed suites are sorted back into sequential order, with a timeout in case a suite takes to long to complete, even when tests are executed in parallel
 *
 * @throws NullPointerException if any passed parameter is null.
 *
 */
case class Args(
  reporter: Reporter,
  stopper: Stopper = Stopper.default,
  filter: Filter = Filter.default,
  configMap: ConfigMap = ConfigMap.empty,
  distributor: Option[Distributor] = None,
  tracker: Tracker = Tracker.default,
  chosenStyles: Set[String] = Set.empty,
  runTestInNewInstance: Boolean = false,
  distributedTestSorter: Option[DistributedTestSorter] = None,
  distributedSuiteSorter: Option[DistributedSuiteSorter] = None
) {
  if (reporter == null)
    throw new NullPointerException("reporter was null")
  if (stopper == null)
    throw new NullPointerException("stopper was null")
  if (filter == null)
    throw new NullPointerException("filter was null")
  if (configMap == null)
    throw new NullPointerException("configMap was null")
  if (distributor == null)
    throw new NullPointerException("distributor was null")
  if (tracker == null)
    throw new NullPointerException("tracker was null")
  if (chosenStyles == null)
    throw new NullPointerException("chosenStyles was null")
  if (distributedTestSorter == null)
    throw new NullPointerException("distributedTestSorter was null")
  if (distributedSuiteSorter == null)
    throw new NullPointerException("distributedSuiteSorter was null")
}