org.scalatest.concurrent

ConductorMethods

trait ConductorMethods extends SuiteMixin with Conductors

Trait that provides each test with access to a new Conductor via methods.

Here's an example of the use of this trait to test the ArrayBlockingQueue concurrency abstraction from java.util.concurrent:

import org.scalatest.FunSuite
import org.scalatest.concurrent.ConductorMethods
import org.scalatest.matchers.ShouldMatchers
import java.util.concurrent.ArrayBlockingQueue

class ArrayBlockingQueueSuite extends FunSuite with ConductorMethods with ShouldMatchers {

  test("calling put on a full queue blocks the producer thread") {

    val buf = new ArrayBlockingQueue[Int](1)

    thread("producer") {
      buf put 42
      buf put 17
      beat should be (1)
    }

    thread("consumer") {
      waitForBeat(1)
      buf.take should be (42)
      buf.take should be (17)
    }

    whenFinished {
      buf should be ('empty)
    }
  }

  test("calling take on an empty queue blocks the consumer thread") {

    val buf = new ArrayBlockingQueue[Int](1)

    thread("producer") {
      waitForBeat(1)
      buf put 42
      buf put 17
    }

    thread("consumer") {
      buf.take should be (42)
      buf.take should be (17)
      beat should be (1)
    }

    whenFinished {
      buf should be ('empty)
    }
  }
}

For an explanation of how these tests work, see the documentation for Conductors.

Self Type
ConductorMethods with Suite
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Inherited
  1. ConductorMethods
  2. Conductors
  3. PatienceConfiguration
  4. AbstractPatienceConfiguration
  5. ScaledTimeSpans
  6. SuiteMixin
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Type Members

  1. final class Conductor extends AnyRef

    Class that facilitates the testing of classes, traits, and libraries designed to be used by multiple threads concurrently.

  2. final case class PatienceConfig(timeout: Span = ..., interval: Span = ...) extends Product with Serializable

    Configuration object for asynchronous constructs, such as those provided by traits Eventually and AsyncAssertions.

Abstract Value Members

  1. abstract def expectedTestCount(filter: Filter): Int

    The total number of tests that are expected to run when this Suite's run method is invoked.

    The total number of tests that are expected to run when this Suite's run method is invoked.

    filter

    a Filter with which to filter tests to count based on their tags

    Definition Classes
    SuiteMixin
  2. abstract def nestedSuites: IndexedSeq[Suite]

    An immutable IndexedSeq of this SuiteMixin object's nested Suites.

    An immutable IndexedSeq of this SuiteMixin object's nested Suites. If this SuiteMixin contains no nested Suites, this method returns an empty IndexedSeq.

    Definition Classes
    SuiteMixin
  3. abstract def rerunner: Option[String]

    The fully qualified name of the class that can be used to rerun this suite.

    The fully qualified name of the class that can be used to rerun this suite.

    Definition Classes
    SuiteMixin
  4. abstract def run(testName: Option[String], args: Args): Status

    Runs this suite of tests.

    Runs this suite of tests.

    testName

    an optional name of one test to execute. If None, all relevant tests should be executed. I.e., None acts like a wildcard that means execute all relevant tests in this Suite.

    args

    the Args for this run

    returns

    a Status object that indicates when all tests and nested suites started by this method have completed, and whether or not a failure occurred.

    Definition Classes
    SuiteMixin
    Exceptions thrown
    NullArgumentException

    if any passed parameter is null.

  5. abstract def runNestedSuites(args: Args): Status

    Runs zero to many of this suite's nested suites.

    Runs zero to many of this suite's nested suites.

    args

    the Args for this run

    returns

    a Status object that indicates when all nested suites started by this method have completed, and whether or not a failure occurred.

    Attributes
    protected
    Definition Classes
    SuiteMixin
    Exceptions thrown
    NullArgumentException

    if args is null.

  6. abstract def runTest(testName: String, args: Args): Status

    Runs a test.

    Runs a test.

    testName

    the name of one test to execute.

    args

    the Args for this run

    returns

    a Status object that indicates when the test started by this method has completed, and whether or not it failed .

    Attributes
    protected
    Definition Classes
    SuiteMixin
    Exceptions thrown
    NullArgumentException

    if any of testName or args is null.

  7. abstract def runTests(testName: Option[String], args: Args): Status

    Runs zero to many of this suite's tests.

    Runs zero to many of this suite's tests.

    testName

    an optional name of one test to run. If None, all relevant tests should be run. I.e., None acts like a wildcard that means run all relevant tests in this Suite.

    args

    the Args for this run

    returns

    a Status object that indicates when all tests started by this method have completed, and whether or not a failure occurred.

    Attributes
    protected
    Definition Classes
    SuiteMixin
    Exceptions thrown
    NullArgumentException

    if either testName or args is null.

  8. abstract val styleName: String

    This suite's style name.

    This suite's style name.

    This lifecycle method provides a string that is used to determine whether this suite object's style is one of the chosen styles for the project.

    Definition Classes
    SuiteMixin
  9. abstract def suiteId: String

    A string ID for this Suite that is intended to be unique among all suites reported during a run.

    A string ID for this Suite that is intended to be unique among all suites reported during a run.

    The suite ID is intended to be unique, because ScalaTest does not enforce that it is unique. If it is not unique, then you may not be able to uniquely identify a particular test of a particular suite. This ability is used, for example, to dynamically tag tests as having failed in the previous run when rerunning only failed tests.

    returns

    this Suite object's ID.

    Definition Classes
    SuiteMixin
  10. abstract def suiteName: String

    A user-friendly suite name for this Suite.

    A user-friendly suite name for this Suite.

    This trait's implementation of this method returns the simple name of this object's class. This trait's implementation of runNestedSuites calls this method to obtain a name for Reports to pass to the suiteStarting, suiteCompleted, and suiteAborted methods of the Reporter.

    returns

    this Suite object's suite name.

    Definition Classes
    SuiteMixin
  11. abstract def tags: Map[String, Set[String]]

    A Map whose keys are String names of tagged tests and whose associated values are the Set of tag names for the test.

    A Map whose keys are String names of tagged tests and whose associated values are the Set of tag names for the test. If a test has no associated tags, its name does not appear as a key in the returned Map. If this Suite contains no tests with tags, this method returns an empty Map.

    Subclasses may override this method to define and/or discover tags in a custom manner, but overriding method implementations should never return an empty Set as a value. If a test has no tags, its name should not appear as a key in the returned Map.

    Definition Classes
    SuiteMixin
  12. abstract def testDataFor(testName: String, theConfigMap: ConfigMap): TestData

    Provides a TestData instance for the passed test name, given the passed config map.

    Provides a TestData instance for the passed test name, given the passed config map.

    This method is used to obtain a TestData instance to pass to withFixture(NoArgTest) and withFixture(OneArgTest) and the beforeEach and afterEach methods of trait BeforeAndAfterEach.

    testName

    the name of the test for which to return a TestData instance

    theConfigMap

    the config map to include in the returned TestData

    returns

    a TestData instance for the specified test, which includes the specified config map

    Definition Classes
    SuiteMixin
  13. abstract def testNames: Set[String]

    A Set of test names.

    A Set of test names. If this Suite contains no tests, this method returns an empty Set.

    Although subclass and subtrait implementations of this method may return a Set whose iterator produces String test names in a well-defined order, the contract of this method does not required a defined order. Subclasses are free to implement this method and return test names in either a defined or undefined order.

    Definition Classes
    SuiteMixin

Concrete Value Members

  1. final def !=(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any
  3. final def ##(): Int

    Definition Classes
    AnyRef → Any
  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  5. final def ==(arg0: Any): Boolean

    Definition Classes
    Any
  6. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  7. def beat: Int

    Gets the current value of the clock.

    Gets the current value of the clock. Primarily useful in assert statements.

    returns

    the current tick value

    Attributes
    protected
  8. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  9. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  10. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  11. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  12. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  13. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  14. def interval(value: Span): Interval

    Returns an Interval configuration parameter containing the passed value, which specifies the amount of time to sleep after a retry.

    Returns an Interval configuration parameter containing the passed value, which specifies the amount of time to sleep after a retry.

    Definition Classes
    PatienceConfiguration
  15. def isConductorFrozen: Boolean

    Check if the clock has been frozen by any threads.

    Check if the clock has been frozen by any threads. (The only way a thread can freeze the clock is by calling withClockFrozen.)

    Attributes
    protected
  16. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  17. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  18. final def notify(): Unit

    Definition Classes
    AnyRef
  19. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  20. implicit def patienceConfig: (ConductorMethods.this)#PatienceConfig

    Implicit PatienceConfig value providing default configuration values.

    Implicit PatienceConfig value providing default configuration values.

    To change the default configuration, override or hide this def with another implicit PatienceConfig containing your desired default configuration values.

    Definition Classes
    PatienceConfigurationAbstractPatienceConfiguration
  21. final def scaled(span: Span): Span

    Scales the passed Span by the Double factor returned by spanScaleFactor.

    Scales the passed Span by the Double factor returned by spanScaleFactor.

    The Span is scaled by invoking its scaledBy method, thus this method has the same behavior: The value returned by spanScaleFactor can be any positive number or zero, including a fractional number. A number greater than one will scale the Span up to a larger value. A fractional number will scale it down to a smaller value. A factor of 1.0 will cause the exact same Span to be returned. A factor of zero will cause Span.ZeroLength to be returned. If overflow occurs, Span.Max will be returned. If underflow occurs, Span.ZeroLength will be returned.

    Definition Classes
    ScaledTimeSpans
    Exceptions thrown
    IllegalArgumentException

    if the value returned from spanScaleFactor is less than zero

  22. def spanScaleFactor: Double

    The factor by which the scaled method will scale Spans.

    The factor by which the scaled method will scale Spans.

    The default implementation of this method will return the span scale factor that was specified for the run, or 1.0 if no factor was specified. For example, you can specify a span scale factor when invoking ScalaTest via the command line by passing a -F argument to Runner.

    Definition Classes
    ScaledTimeSpans
  23. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  24. def thread(f: ⇒ Unit): Thread

    Create a new thread that will execute the given function.

    Create a new thread that will execute the given function. If the test is started, then the thread will run the function immediately. If it is not yet started, the Thread will wait to run the function until all threads are up and ready to go.

    f

    the function to be executed by the thread

    Attributes
    protected
  25. def threadNamed(name: String)(f: ⇒ Unit): Thread

    Create a new thread that will execute the given function.

    Create a new thread that will execute the given function. If the test is started, then the thread will run the function immediately. If it is not yet started, the Thread will wait to run the function until all threads are up and ready to go.

    name

    the name of the thread

    f

    the function to be executed by the thread

    Attributes
    protected
  26. def timeout(value: Span): Timeout

    Returns a Timeout configuration parameter containing the passed value, which specifies the maximum amount to wait for an asynchronous operation to complete.

    Returns a Timeout configuration parameter containing the passed value, which specifies the maximum amount to wait for an asynchronous operation to complete.

    Definition Classes
    PatienceConfiguration
  27. def toString(): String

    Definition Classes
    AnyRef → Any
  28. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  29. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  30. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  31. def waitForBeat(beat: Int): Succeeded.type

    Force the current thread to block until the thread clock reaches the specified value, at which point the current thread is unblocked.

    Force the current thread to block until the thread clock reaches the specified value, at which point the current thread is unblocked.

    Attributes
    protected
  32. def whenFinished(fun: ⇒ Assertion): Assertion

    Register a function to be executed after the simulation has finished.

    Register a function to be executed after the simulation has finished.

    Attributes
    protected
  33. def withConductorFrozen[T](f: ⇒ T): T

    Run the passed function, ensuring the clock does not advance while the function is running (has not yet returned or thrown an exception).

    Run the passed function, ensuring the clock does not advance while the function is running (has not yet returned or thrown an exception).

    Attributes
    protected
  34. def withFixture(test: (ConductorMethods.this)#NoArgTest): Outcome

    Creates and initializes a private instance variable with a new Conductor, ensuring it is visible to any thread, invokes the passed test function, and invokes conduct on the Conductor, if it was not already invoked by the test.

    Creates and initializes a private instance variable with a new Conductor, ensuring it is visible to any thread, invokes the passed test function, and invokes conduct on the Conductor, if it was not already invoked by the test.

    This trait is stackable with other traits that override withFixture(NoArgTest), because instead of invoking the test function directly, it delegates responsibility for invoking the test function to super.withFixture(NoArgTest).

    test

    the no-arg test function to run with a fixture

    Definition Classes
    ConductorMethodsSuiteMixin

Inherited from Conductors

Inherited from PatienceConfiguration

Inherited from ScaledTimeSpans

Inherited from SuiteMixin

Inherited from AnyRef

Inherited from Any

Ungrouped