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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

/*
Delete this later:
class ArithmeticSuite extends FunSuite with matchers.ShouldMatchers {
  test("addition works") {
    1 + 1 should equal (2)
  }
  ignore("subtraction works") {
    1 - 1 should equal (0)
  }
  test("multiplication works") {
    1 * 1 should equal (2)
  }
  test("division works") (pending)
}
*/

/**
 * Trait whose instances provide a run method and configuration fields that implement
 * the ScalaTest shell: its DSL for the Scala interpreter.
 *
 * 
 * The main command of the ScalaTest shell is run, which you can use to run a suite of tests.
 * The shell also provides several commands for configuring a call to run:
 * 
 *
 * 
 * color (the default) - display results in color (green for success; red for failure; yellow for warning; blue for statistics)
 * nocolor - display results without color
 * durations - display durations of (i.e., how long it took to run) tests and suites
 * nodurations (the default) - do not display durations of tests and suites
 * shortstacks - display short (i.e., truncated to show just the most useful portion) stack traces for all exceptions
 * fullstacks - display full stack trackes for all exceptions
 * nostacks (the default) - display no stack trace for StackDepth exceptions and a short stack trace for non-StackDepth
 *   exceptions
 * stats - display statistics before and after the run, such as expected test count before the run and tests succeeded, failed, pending,
 * etc., counts after the run
 * nostats (the default) not display statistics before or after the run
 * 
 *
 * 
 * The default configuration is color, nodurations, nostacks, and nostats.
 * 
 *
 * 
 * All of these commands are fields of trait org.scalatest.Shell. Each configuration command is a field that refers to
 * another Shell instance with every configuration parameter
 * the same except for the one you've asked to change. For example, durations provides a
 * Shell instance that has every parameter configured the same way, except with durations enabled. When you invoke
 * run on that, you will get a run with durations enabled and every other configuration parameter at its default value.
 * 

 *
 * 

 * The other useful "command"
 * to know about, though not technically part of the shell, is the apply factory method in the Suites 
 * singleton object. This allows you to easily create composite suites out of nested suites, which you can then pass to run. This
 * will be demonstrated later in this documentation.
 * 
 *
 * Using the ScalaTest shell
 *
 * 
 * The package object of the org.scalatest package, although it does not extend Shell, declares all the
 * same members as Shell. Its run method runs with all the Shell configuration parameters set
 * to their default values. A good way to use the ScalaTest shell, therefore, is to import the members of package org.scalatest:
 * 
 *
 *  * scala> import org.scalatest._
 * import org.scalatest._
 * 
 *
 * 
 * One thing importing org.scalatest._ allows you to do is access any of ScalaTest's classes and traits by shorter
 * names, for example:
 * 
 *
 *  * scala> class ArithmeticSuite extends FunSuite with matchers.ShouldMatchers {
 *      |   test("addition works") { 
 *      |     1 + 1 should equal (2)
 *      |   } 
 *      |   ignore("subtraction works") {
 *      |     1 - 1 should equal (0)
 *      |   }
 *      |   test("multiplication works") {
 *      |     1 * 1 should equal (2) 
 *      |   }
 *      |   test("division works") (pending)
 *      | } 
 * defined class ArithmeticSuite
 * 
 *
 * 
 * But importing org.scalatest._ also brings into scope the commands of the Shell, so you can, for
 * example, invoke run without qualification:
 * 
 *
 *  * scala> run(new ArithmeticSuite)
 * ArithmeticSuite:
 * - addition works
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED ***
 *   1 did not equal 2 (:16)
 * - division works (pending)
 * 
 *
 * Configuring a single run
 *
 * 
 * To configure a single run, you can prefix run by one or more configuration commands, separated by dots. For example, to enable
 * durations during a single run, you would write:
 * 
 *
 *  * scala> durations.run(new ArithmeticSuite)
 * ArithmeticSuite:
 * - addition works (102 milliseconds)
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED *** (36 milliseconds)
 *   1 did not equal 2 (:16)
 * - division works (pending)
 * 
 *
 * 
 * To enable statistics during a single run, you would write:
 * 
 *
 *  * scala> stats.run(new ArithmeticSuite)
 * Run starting. Expected test count is: 3
 * ArithmeticSuite:
 * - addition works
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED ***
 *   1 did not equal 2 (:16)
 * - division works (pending)
 * Run completed in 386 milliseconds.
 * Total number of tests run: 2
 * Suites: completed 1, aborted 0
 * Tests: succeeded 1, failed 1, ignored 1, pending 1
 * *** 1 TEST FAILED ***
 * 
 *
 * 
 * And to enable both durations and statistics during a single run, you could write:
 * 
 *
 *  * scala> durations.stats.run(new ArithmeticSuite)
 * Run starting. Expected test count is: 3
 * ArithmeticSuite:
 * - addition works (102 milliseconds)
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED (36 milliseconds)***
 *   1 did not equal 2 (:16)
 * - division works (pending)
 * Run completed in 386 milliseconds.
 * Total number of tests run: 2
 * Suites: completed 1, aborted 0
 * Tests: succeeded 1, failed 1, ignored 1, pending 1
 * *** 1 TEST FAILED ***
 * 
 *
 * 
 * The order doesn't matter when you are chaining multiple configuration commands. You'll get the same
 * result whether you write durations.stats.run or stats.durations.run.
 * 
 *
 * 
 * To disable color, use nocolor:
 * 
 *
 *  * scala> nocolor.run(new ArithmeticSuite)
 * ArithmeticSuite:
 * - addition works
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED ***
 *   1 did not equal 2 (:16)
 * - division works (pending)
 * 
 *
 * 
 * To enable short stack traces during a single run, use shortstacks:
 * 
 *
 *  * scala> shortstacks.run(new ArithmeticSuite)
 * ArithmeticSuite:
 * - addition works (101 milliseconds)
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED *** (33 milliseconds)
 *   1 did not equal 2 (:16)
 *   org.scalatest.TestFailedException:
 *   ...
 *   at line2$object$$iw$$iw$$iw$$iw$ArithmeticSuite$$anonfun$3.apply$mcV$sp(:16)
 *   at line2$object$$iw$$iw$$iw$$iw$ArithmeticSuite$$anonfun$3.apply(:16)
 *   at line2$object$$iw$$iw$$iw$$iw$ArithmeticSuite$$anonfun$3.apply(:16)
 *   at org.scalatest.FunSuite$$anon$1.apply(FunSuite.scala:992)
 *   at org.scalatest.Suite$class.withFixture(Suite.scala:1661)
 *   at line2$object$$iw$$iw$$iw$$iw$ArithmeticSuite.withFixture(:8)
 *   at org.scalatest.FunSuite$class.invokeWithFixture$1(FunSuite.scala:989)
 *   ...
 * - division works (pending)
 * 
 *
 * Changing the default configuration
 *
 * 
 * If you want to change the default for multiple runs, you can import the members of your favorite Shell configuration. For example,
 * if you always like to run with durations and statistics enabled, you could write:
 * 

 *
 * 
 * scala> import stats.durations._
 * import stats.durations._
 * 
 *
 * 
 * Now anytime you run statistics and durations will, by default, be enabled:
 * 

 *
 * 
 * scala> run(new ArithmeticSuite)
 * Run starting. Expected test count is: 3
 * ArithmeticSuite:
 * - addition works (9 milliseconds)
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED *** (10 milliseconds)
 *   1 did not equal 2 (:18)
 * - division works (pending)
 * Run completed in 56 milliseconds.
 * Total number of tests run: 2
 * Suites: completed 1, aborted 0
 * Tests: succeeded 1, failed 1, ignored 1, pending 1
 * *** 1 TEST FAILED ***
 * 
 *
 * Running multiple suites
 *
 * 
 * If you want to run multiple suites, you can use the factory method in the Suites 
 * singleton object. If you wrap a comma-separated list of suite instances inside Suites(...), for example,
 * you'll get a suite instance that contains no tests, but whose nested suites includes the suite instances you placed between
 * the parentheses. You can place Suites inside Suites to any level of depth, creating a tree of
 * suites to pass to run. Here's a (contrived) example in which ArithmeticSuite is executed four times:
 * 

 *
 * 
 * scala> run(Suites(new ArithmeticSuite, new ArithmeticSuite, Suites(new ArithmeticSuite, new ArithmeticSuite)))
 * Run starting. Expected test count is: 12
 * Suites:
 * ArithmeticSuite:
 * - addition works (0 milliseconds)
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED *** (1 millisecond)
 *   1 did not equal 2 (:16)
 * - division works (pending)
 * ArithmeticSuite:
 * - addition works (1 millisecond)
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED *** (0 milliseconds)
 *   1 did not equal 2 (:16)
 * - division works (pending)
 * Suites:
 * ArithmeticSuite:
 * - addition works (0 milliseconds)
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED *** (0 milliseconds)
 *   1 did not equal 2 (:16)
 * - division works (pending)
 * ArithmeticSuite:
 * - addition works (0 milliseconds)
 * - subtraction works !!! IGNORED !!!
 * - multiplication works *** FAILED *** (0 milliseconds)
 *   1 did not equal 2 (:16)
 * - division works (pending)
 * Run completed in 144 milliseconds.
 * Total number of tests run: 8
 * Suites: completed 6, aborted 0
 * Tests: succeeded 4, failed 4, ignored 4, pending 4
 * *** 4 TESTS FAILED ***
 * 
 * 
 * Running a single test
 *
 * 
 * The run command also allows you to specify the name of a test to run and/or a config map. You can run
 * a particular test in a suite, for example, by specifying the test name after the suite instance in your call to run, like this:
 * 

 *
 * 
 * scala> run(new ArithmeticSuite, "addition works")
 * ArithmeticSuite:
 * - addition works
 * 
 */
sealed trait Shell {

  /**
   * A Shell whose run method will pass true for execute's color
   * parameter, and pass for all other parameters the same values as this Shell.
   */
  val color: Shell

  /**
   * A Shell whose run method will pass true for execute's durations
   * parameter, and pass for all other parameters the same values as this Shell.
   */
  val durations: Shell

  /**
   * A Shell whose run method will pass true for execute's shortstacks
   * parameter and false for its fullstacks parameter, and pass for all other parameters the same values as
   * this Shell.
   */
  val shortstacks: Shell

  /**
   * A Shell whose run method will pass false for execute's shortstacks
   * parameter and true for its fullstacks parameter, and pass for all other parameters the same values as this Shell.
   */
  val fullstacks: Shell

  /**
   * A Shell whose run method will pass true for execute's stats
   * parameter, and pass for all other parameters the same values as this Shell.
   */
  val stats: Shell

  /**
   * Returns a copy of this Shell with colorPassed configuration parameter set to false.
   */
  val nocolor: Shell

  /**
   * Returns a copy of this Shell with durationsPassed configuration parameter set to false.
   */
  val nodurations: Shell

  /**
   * Returns a copy of this Shell with shortStacksPassed configuration parameter set to false.
   */
  val nostacks: Shell

  /**
   * Returns a copy of this Shell with statsPassed configuration parameter set to false.
   */
  val nostats: Shell

  /**
   * Run the passed suite, optionally passing in a test name and config map. 
   *
   * 
   * This method will invoke execute on the passed suite, passing in
   * the specified (or default) testName and configMap and a set of configuration values. A
   * particular Shell instance will always pass the same configuration values (color,
   * durations, shortstacks, fullstacks, and stats) to execute each time
   * this method is invoked.
   * 
   */
  def run(suite: Suite, testName: String = null, configMap: ConfigMap = ConfigMap.empty): Unit
}

// parameters were private, but after pulling out the trait so I don't import copy() as part
// of the package object, I made the whole case class private[scalatest], so I made these normal
// so that I could write some tests against it.
private[scalatest] final case class ShellImpl(
  colorPassed: Boolean = true,
  durationsPassed: Boolean = false,
  shortstacksPassed: Boolean = false,
  fullstacksPassed: Boolean = false,
  statsPassed: Boolean = false
) extends Shell {

  lazy val color: Shell = copy(colorPassed = true)
  lazy val durations: Shell = copy(durationsPassed = true)
  lazy val shortstacks: Shell = copy(shortstacksPassed = true, fullstacksPassed = false)
  lazy val fullstacks: Shell = copy(fullstacksPassed = true, shortstacksPassed = false)
  lazy val stats: Shell = copy(statsPassed = true)
  lazy val nocolor: Shell = copy(colorPassed = false)
  lazy val nodurations: Shell = copy(durationsPassed = false)
  lazy val nostacks: Shell = copy(shortstacksPassed = false, fullstacksPassed = false)
  lazy val nostats: Shell = copy(statsPassed = false)

  def run(suite: Suite, testName: String = null, configMap: ConfigMap = ConfigMap.empty) {
    suite.execute(testName, configMap, colorPassed, durationsPassed, shortstacksPassed, fullstacksPassed, statsPassed)
  }
}