org.scalatest.concurrent

ConductorFixture

trait ConductorFixture extends AnyRef

Trait that can pass a new Conductor fixture into tests.

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

import org.scalatest.fixture
import org.scalatest.concurrent.ConductorFixture
import org.scalatest.matchers.ShouldMatchers
import java.util.concurrent.ArrayBlockingQueue

class ArrayBlockingQueueSuite extends fixture.FunSuite with ConductorFixture with ShouldMatchers {
test("calling put on a full queue blocks the producer thread") { conductor => import conductor._
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") { conductor => import conductor._
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 Conductor.

Self Type
ConductorFixture with Suite
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Type Members

  1. type FixtureParam = Conductor

    Defines type Fixture to be Conductor.

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  22. def withFixture (test: OneArgTest): Unit

    Creates a new Conductor, passes the Conductor to the specified test function, and ensures that conduct gets invoked on the Conductor.

    Creates a new Conductor, passes the Conductor to the specified test function, and ensures that conduct gets invoked on the Conductor.

    After the test function returns (so long as it returns normally and doesn't complete abruptly with an exception), this method will determine whether the conduct method has already been called (by invoking conductingHasBegun on the Conductor). If not, this method will invoke conduct to ensure that the multi-threaded scenario is actually conducted.

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