org.scalatest

BeforeAndAfter

trait BeforeAndAfter extends AbstractSuite

Trait that can be mixed into suites that need code executed before and after running each test. This trait facilitates a style of testing in which mutable fixture objects held in instance variables are replaced or reinitialized before each test or suite. Here's an example:

import org.scalatest._
import scala.collection.mutable.ListBuffer

class MySuite extends FunSuite with BeforeAndAfter {

  // Fixtures as reassignable variables and mutable objects
  var sb: StringBuilder = _
  val lb = new ListBuffer[String]

  before {
    sb = new StringBuilder("ScalaTest is ")
    lb.clear()
  }

  def testEasy() {
    sb.append("easy!")
    assert(sb.toString === "ScalaTest is easy!")
    assert(lb.isEmpty)
    lb += "sweet"
  }

  def testFun() {
    sb.append("fun!")
    assert(sb.toString === "ScalaTest is fun!")
    assert(lb.isEmpty)
  }
}

Because this trait invokes super.runTest to run each test, you will need to mix it in after a core suite trait to get the desired behavior. For example, this won't compile, because BeforeAndAfter is "super" to FunSuite:

class MySuite extends BeforeAndAfter with FunSuite

You'd need to turn it around, so that FunSuite is "super" to BeforeAndAfter, like this:

class MySuite extends FunSuite with BeforeAndAfter

The before and after methods can each only be called once per Suite, and cannot be invoked after run has been invoked.

Note: The advantage this trait has over BeforeAndAfterEach is that its syntax is more concise. The main disadvantage is that it is not stackable, whereas BeforeAndAfterEach is. I.e., you can write several traits that extend BeforeAndAfterEach and provide beforeEach methods that include a call to super.beforeEach, and mix them together in various combinations. By contrast, only one call to the before registration function is allowed in a suite or spec that mixes in BeforeAndAfter. In addition, BeforeAndAfterEach allows you to access the config map in its beforeEach and afterEach methods, whereas BeforeAndAfter gives you no access to the config map.

Self Type
BeforeAndAfter with Suite
Linear Supertypes
AbstractSuite, AnyRef, Any
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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
    AbstractSuite

  2. abstract def nestedSuites: List[Suite]

    A List of this Suite object's nested Suites.

    A List of this Suite object's nested Suites. If this Suite contains no nested Suites, this method returns an empty List.

    Definition Classes
    AbstractSuite

  3. abstract def runNestedSuites(reporter: Reporter, stopper: Stopper, filter: Filter, configMap: Map[String, Any], distributor: Option[Distributor], tracker: Tracker): Unit

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

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

    reporter

    the Reporter to which results will be reported

    stopper

    the Stopper that will be consulted to determine whether to stop execution early.

    filter

    a Filter with which to filter tests based on their tags

    configMap

    a Map of key-value pairs that can be used by the executing Suite of tests.

    distributor

    an optional Distributor, into which to put nested Suites to be run by another entity, such as concurrently by a pool of threads. If None, nested Suites will be run sequentially.

    tracker

    a Tracker tracking Ordinals being fired by the current thread.

    Attributes
    protected
    Definition Classes
    AbstractSuite
    Exceptions thrown
    NullPointerException

    if any passed parameter is null.

  4. abstract def runTests(testName: Option[String], reporter: Reporter, stopper: Stopper, filter: Filter, configMap: Map[String, Any], distributor: Option[Distributor], tracker: Tracker): Unit

    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.

    reporter

    the Reporter to which results will be reported

    stopper

    the Stopper that will be consulted to determine whether to stop execution early.

    filter

    a Filter with which to filter tests based on their tags

    configMap

    a Map of key-value pairs that can be used by the executing Suite of tests.

    distributor

    an optional Distributor, into which instances of this Suite class that are responsible for executing individual tests contained in this Suite, or groups of this Suite's tests, may be placed so as to be run by another entity, such as concurrently by a pool of threads.

    tracker

    a Tracker tracking Ordinals being fired by the current thread.

    Attributes
    protected
    Definition Classes
    AbstractSuite
    Exceptions thrown
    NullPointerException

    if any of testName, reporter, stopper, groupsToInclude, groupsToExclude, or configMap is null.

  5. abstract val styleName: String

    Suite style name.

    Suite style name.

    Definition Classes
    AbstractSuite

  6. abstract def tags: Map[String, Set[String]]

    A Map whose keys are String tag names with which tests in this Suite are marked, and whose values are the Set of test names marked with each tag.

    A Map whose keys are String tag names with which tests in this Suite are marked, and whose values are the Set of test names marked with each tag. If this Suite contains no tags, this method returns an empty Map.

    Subclasses may implement 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 tag has no tests, its name should not appear as a key in the returned Map.

    Definition Classes
    AbstractSuite

  7. abstract def testNames: Set[String]

    An Set of test names.

    An 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
    AbstractSuite

  8. abstract def withFixture(test: (BeforeAndAfter.this)#NoArgTest): Unit

    Runs the passed test function with a fixture established by this method.

    Runs the passed test function with a fixture established by this method.

    This method should set up the fixture needed by the tests of the current suite, invoke the test function, and if needed, perform any clean up needed after the test completes. Because the NoArgTest function passed to this method takes no parameters, preparing the fixture will require side effects, such as reassigning instance vars in this Suite or initializing a globally accessible external database. If you want to avoid reassigning instance vars you can use fixture.Suite.

    test

    the no-arg test function to run with a fixture

    Attributes
    protected
    Definition Classes
    AbstractSuite

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. def after(fun: ⇒ Any): Unit

    Registers code to be executed after each of this suite's tests.

    Registers code to be executed after each of this suite's tests.

    This trait's implementation of runTest executes the code passed to this method after running each test. Thus the code passed to this method can be used to tear down a test fixture needed by each test.

    Attributes
    protected
    Exceptions thrown
    NotAllowedException

    if invoked more than once on the same Suite or if invoked after run has been invoked on the Suite

  7. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  8. def before(fun: ⇒ Any): Unit

    Registers code to be executed before each of this suite's tests.

    Registers code to be executed before each of this suite's tests.

    This trait's implementation of runTest executes the code passed to this method before running each test. Thus the code passed to this method can be used to set up a test fixture needed by each test.

    Attributes
    protected
    Exceptions thrown
    NotAllowedException

    if invoked more than once on the same Suite or if invoked after run has been invoked on the Suite

  9. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws()

  10. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  11. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  12. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws()

  13. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any

  14. def hashCode(): Int

    Definition Classes
    AnyRef → Any

  15. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

  16. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  17. final def notify(): Unit

    Definition Classes
    AnyRef

  18. final def notifyAll(): Unit

    Definition Classes
    AnyRef

  19. def run(testName: Option[String], reporter: Reporter, stopper: Stopper, filter: Filter, configMap: Map[String, Any], distributor: Option[Distributor], tracker: Tracker): Unit

    This trait's implementation of run sets a flag indicating run has been invoked, after which any invocation to before or after will complete abruptly with a NotAllowedException.

    This trait's implementation of run sets a flag indicating run has been invoked, after which any invocation to before or after will complete abruptly with a NotAllowedException.

    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.

    reporter

    the Reporter to which results will be reported

    stopper

    the Stopper that will be consulted to determine whether to stop execution early.

    filter

    a Filter with which to filter tests based on their tags

    configMap

    a Map of key-value pairs that can be used by the executing Suite of tests.

    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.

    tracker

    a Tracker tracking Ordinals being fired by the current thread.

    Definition Classes
    BeforeAndAfter → AbstractSuite

  20. def runTest(testName: String, reporter: Reporter, stopper: Stopper, configMap: Map[String, Any], tracker: Tracker): Unit

    Run a test surrounded by calls to the code passed to before and after, if any.

    Run a test surrounded by calls to the code passed to before and after, if any.

    This trait's implementation of this method ("this method") invokes the function registered with before, if any, before running each test and the function registered with after, if any, after running each test. It runs each test by invoking super.runTest, passing along the five parameters passed to it.

    If any invocation of the function registered with before completes abruptly with an exception, this method will complete abruptly with the same exception. If any call to super.runTest completes abruptly with an exception, this method will complete abruptly with the same exception, however, before doing so, it will invoke the function registered with after, if any. If the function registered with after also completes abruptly with an exception, this method will nevertheless complete abruptly with the exception previously thrown by super.runTest. If super.runTest returns normally, but the function registered with after completes abruptly with an exception, this method will complete abruptly with the exception thrown by the function registered with after.

    testName

    the name of one test to execute.

    reporter

    the Reporter to which results will be reported

    stopper

    the Stopper that will be consulted to determine whether to stop execution early.

    configMap

    a Map of key-value pairs that can be used by the executing Suite of tests.

    tracker

    a Tracker tracking Ordinals being fired by the current thread.

    Attributes
    protected
    Definition Classes
    BeforeAndAfter → AbstractSuite

  21. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef

  22. def toString(): String

    Definition Classes
    AnyRef → Any

  23. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws()

  24. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws()

  25. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws()

Inherited from AbstractSuite

Inherited from AnyRef

Inherited from Any

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