FixtureAnyFeatureSpec
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package featurespec
Describe a “subject” being specified and tested by the passed function value.
Describe a “subject” being specified and tested by the passed function value. The
passed function value may contain more describers (defined with describe) and/or tests
(defined with it). This trait's implementation of this method will register the
description string and immediately invoke the passed function.
the description text
Register a test with the given spec text, optional tags, and test function value that takes no arguments.
Register a test with the given spec text, optional tags, and test function value that takes no arguments. An invocation of this method is called an “example.”
This method will register the test for later execution via an invocation of one of the execute
methods. The name of the test will be a concatenation of the text of all surrounding describers,
from outside in, and the passed spec text, with one space placed between each item. (See the documenation
for testNames for an example.) The resulting test name must not have been registered previously on
this FixtureAnyFeatureSpec instance.
the specification text, which will be combined with the descText of any surrounding describers to form the test name
the optional list of tags for this test
DuplicateTestNameException if a test with the same name has been registered previously
NullArgumentException if specText or any passed test tag is null
TestRegistrationClosedException if invoked after run has been invoked on this suite
Registers shared scenarios.
Registers shared scenarios.
This method enables the following syntax for shared scenarios in a FixtureAnyFeatureSpec:
ScenariosFor(nonEmptyStack(lastValuePushed))
This method just provides syntax sugar intended to make the intent of the code clearer.
Because the parameter passed to it is
type Unit, the expression will be evaluated before being passed, which
is sufficient to register the shared scenarios. For examples of shared scenarios, see the
Shared scenarios section in the main documentation for
trait AnyFeatureSpec.
Returns an Alerter that during test execution will forward strings (and other objects) passed to its
apply method to the current reporter.
Returns an Alerter that during test execution will forward strings (and other objects) passed to its
apply method to the current reporter. If invoked in a constructor, it
will register the passed string for forwarding later during test execution. If invoked while this
FixtureAnyFeatureSpec is being executed, such as from inside a test function, it will forward the information to
the current reporter immediately. If invoked at any other time, it will
print to the standard output. This method can be called safely by any thread.
Implicitly converts a function that takes no parameters and results in PendingStatement to
a function from FixtureParam to Any, to enable pending tests to registered as by-name parameters
by methods that require a test function that takes a FixtureParam.
Implicitly converts a function that takes no parameters and results in PendingStatement to
a function from FixtureParam to Any, to enable pending tests to registered as by-name parameters
by methods that require a test function that takes a FixtureParam.
This method makes it possible to write pending tests as simply (pending), without needing
to write (fixture => pending).
a function
a function of FixtureParam => Any
Register a test to ignore, which has the given spec text, optional tags, and test function value that takes no arguments.
Register a test to ignore, which has the given spec text, optional tags, and test function value that takes no arguments.
This method will register the test for later ignoring via an invocation of one of the execute
methods. This method exists to make it easy to ignore an existing test by changing the call to it
to ignore without deleting or commenting out the actual test code. The test will not be executed, but a
report will be sent that indicates the test was ignored. The name of the test will be a concatenation of the text of all surrounding describers,
from outside in, and the passed spec text, with one space placed between each item. (See the documenation
for testNames for an example.) The resulting test name must not have been registered previously on
this FixtureAnyFeatureSpec instance.
the specification text, which will be combined with the descText of any surrounding describers to form the test name
the optional list of tags for this test
DuplicateTestNameException if a test with the same name has been registered previously
NullArgumentException if specText or any passed test tag is null
TestRegistrationClosedException if invoked after run has been invoked on this suite
Returns an Informer that during test execution will forward strings passed to its
apply method to the current reporter.
Returns an Informer that during test execution will forward strings passed to its
apply method to the current reporter. If invoked in a constructor, it
will register the passed string for forwarding later during test execution. If invoked from inside a scope,
it will forward the information to the current reporter immediately. If invoked from inside a test function,
it will record the information and forward it to the current reporter only after the test completed, as recordedEvents
of the test completed event, such as TestSucceeded. If invoked at any other time, it will print to the standard output.
This method can be called safely by any thread.
Returns a Documenter that during test execution will forward strings passed to its
apply method to the current reporter.
Returns a Documenter that during test execution will forward strings passed to its
apply method to the current reporter. If invoked in a constructor, it
will register the passed string for forwarding later during test execution. If invoked from inside a scope,
it will forward the information to the current reporter immediately. If invoked from inside a test function,
it will record the information and forward it to the current reporter only after the test completed, as recordedEvents
of the test completed event, such as TestSucceeded. If invoked at any other time, it will print to the standard output.
This method can be called safely by any thread.
Returns a Notifier that during test execution will forward strings (and other objects) passed to its
apply method to the current reporter.
Returns a Notifier that during test execution will forward strings (and other objects) passed to its
apply method to the current reporter. If invoked in a constructor, it
will register the passed string for forwarding later during test execution. If invoked while this
FixtureAnyFeatureSpec is being executed, such as from inside a test function, it will forward the information to
the current reporter immediately. If invoked at any other time, it will
print to the standard output. This method can be called safely by any thread.
Run a test.
Run a test. This trait's implementation runs the test registered with the name specified by
testName. Each test's name is a concatenation of the text of all describers surrounding a test,
from outside in, and the test's spec text, with one space placed between each item. (See the documenation
for testNames for an example.)
the name of one test to execute.
the Args for this run
a Status object that indicates when the test started by this method has completed, and whether or not it failed .
NullArgumentException if testName, reporter, stopper, or configMap
is null.
Run zero to many of this FixtureAnyFeatureSpec's tests.
Run zero to many of this FixtureAnyFeatureSpec's tests.
This method takes a testName parameter that optionally specifies a test to invoke.
If testName is Some, this trait's implementation of this method
invokes runTest on this object with passed args.
This method takes an args that contains a Set of tag names that should be included (tagsToInclude), and a Set
that should be excluded (tagsToExclude), when deciding which of this Suite's tests to execute.
If tagsToInclude is empty, all tests will be executed
except those those belonging to tags listed in the tagsToExclude Set. If tagsToInclude is non-empty, only tests
belonging to tags mentioned in tagsToInclude, and not mentioned in tagsToExclude
will be executed. However, if testName is Some, tagsToInclude and tagsToExclude are essentially ignored.
Only if testName is None will tagsToInclude and tagsToExclude be consulted to
determine which of the tests named in the testNames Set should be run. For more information on trait tags, see the main documentation for this trait.
If testName is None, this trait's implementation of this method
invokes testNames on this Suite to get a Set of names of tests to potentially execute.
(A testNames value of None essentially acts as a wildcard that means all tests in
this Suite that are selected by tagsToInclude and tagsToExclude should be executed.)
For each test in the testName Set, in the order
they appear in the iterator obtained by invoking the elements method on the Set, this trait's implementation
of this method checks whether the test should be run based on the tagsToInclude and tagsToExclude Sets.
If so, this implementation invokes runTest with passed in args.
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 FixtureAnyFeatureSpec.
the Args for this run
a Status object that indicates when all tests started by this method have completed, and whether or not a failure occurred.
NullArgumentException if any of testName or args is null.
A Map whose keys are String tag names to which tests in this FixtureAnyFeatureSpec belong, and values
the Set of test names that belong to each tag.
A Map whose keys are String tag names to which tests in this FixtureAnyFeatureSpec belong, and values
the Set of test names that belong to each tag. If this FixtureAnyFeatureSpec contains no tags, this method returns an empty Map.
This trait's implementation returns tags that were passed as strings contained in Tag objects passed to
methods test and ignore.
In addition, this trait's implementation will also auto-tag tests with class level annotations. For example, if you annotate @Ignore at the class level, all test methods in the class will be auto-annotated with @Ignore.
An immutable Set of test names.
An immutable Set of test names. If this FixtureAnyFeatureSpec contains no tests, this method returns an
empty Set.
This trait's implementation of this method will return a set that contains the names of all registered tests. The set's iterator will return those names in the order in which the tests were registered. Each test's name is composed of the concatenation of the text of each surrounding describer, in order from outside in, and the text of the example itself, with all components separated by a space.
the Set of test names
Returns a user friendly string for this suite, composed of the
simple name of the class (possibly simplified further by removing dollar signs if added by the Scala interpeter) and, if this suite
contains nested suites, the result of invoking toString on each
of the nested suites, separated by commas and surrounded by parentheses.
Returns a user friendly string for this suite, composed of the
simple name of the class (possibly simplified further by removing dollar signs if added by the Scala interpeter) and, if this suite
contains nested suites, the result of invoking toString on each
of the nested suites, separated by commas and surrounded by parentheses.
a user-friendly string for this suite
(Since version 3.1.0) The conversionCheckedConstraint method has been deprecated and will be removed in a future version of ScalaTest. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.
(Since version 3.1.0) The convertEquivalenceToAToBConversionConstraint method has been deprecated and will be removed in a future version of ScalaTest. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.
(Since version 3.1.0) The convertEquivalenceToBToAConversionConstraint method has been deprecated and will be removed in a future version of ScalaTest. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.
The feature (starting with lowercase 'f') method has been deprecated and will be removed in a future version of ScalaTest. Please use Feature (starting with an uppercase 'F') instead.
The feature (starting with lowercase 'f') method has been deprecated and will be removed in a future version of ScalaTest. Please use Feature (starting with an uppercase 'F') instead.
This method has been renamed for consistency with ScalaTest's Given, When, and Then methods, which were changed to uppper case
when Scala deprecated then as an identifier, and Cucumber, one of the main original inspirations for FeatureSpec.
This can be rewritten automatically with autofix: https://github.com/scalatest/autofix/tree/master/3.1.x.
(Since version 3.1.0) The feature (starting with lowercase 'f') method has been deprecated and will be removed in a future version of ScalaTest. Please use Feature (starting with an uppercase 'F') instead. This can be rewritten automatically with autofix: https://github.com/scalatest/autofix/tree/master/3.1.x
(Since version 3.1.0) The lowPriorityConversionCheckedConstraint method has been deprecated and will be removed in a future version of ScalaTest. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.
The scenario (starting with lowercase 's') method has been deprecated and will be removed in a future version of ScalaTest. Please use Scenario (starting with an uppercase 'S') instead.
The scenario (starting with lowercase 's') method has been deprecated and will be removed in a future version of ScalaTest. Please use Scenario (starting with an uppercase 'S') instead.
This method has been renamed for consistency with ScalaTest's Given, When, and Then methods, which were changed to uppper case
when Scala deprecated then as an identifier, and Cucumber, one of the main original inspirations for FeatureSpec.
This can be rewritten automatically with autofix: https://github.com/scalatest/autofix/tree/master/3.1.x.
(Since version 3.1.0) The scenario (starting with lowercase 's') method has been deprecated and will be removed in a future version of ScalaTest. Please use Scenario (starting with an uppercase 'S') instead. This can be rewritten automatically with autofix: https://github.com/scalatest/autofix/tree/master/3.1.x
The scenariosFor (starting with lowercase 's') method has been deprecated and will be removed in a future version of ScalaTest. Please use ScenariosFor (starting with an uppercase 'S') instead.
The scenariosFor (starting with lowercase 's') method has been deprecated and will be removed in a future version of ScalaTest. Please use ScenariosFor (starting with an uppercase 'S') instead.
This method has been renamed for consistency with ScalaTest's Given, When, and Then methods, which were changed to uppper case
when Scala deprecated then as an identifier, and Cucumber, one of the main original inspirations for FeatureSpec.
This can be rewritten automatically with autofix: https://github.com/scalatest/autofix/tree/master/3.1.x.
(Since version 3.1.0) The scenariosFor (starting with lowercase 's') method has been deprecated and will be removed in a future version of ScalaTest. Please use ScenariosFor (starting with an uppercase 'S') instead. This can be rewritten automatically with autofix: https://github.com/scalatest/autofix/tree/master/3.1.x
The styleName lifecycle method has been deprecated and will be removed in a future version of ScalaTest.
The styleName lifecycle method has been deprecated and will be removed in a future version of ScalaTest.
This method was used to support the chosen styles feature, which was deactivated in 3.1.0. The internal modularization of ScalaTest in 3.2.0
will replace chosen styles as the tool to encourage consistency across a project. We do not plan a replacement for styleName.
(Since version 3.1.0) The styleName lifecycle method has been deprecated and will be removed in a future version of ScalaTest with no replacement.
A sister class to
org.scalatest.featurespec.AnyFeatureSpecthat can pass a fixture object into its tests.FixtureAnyFeatureSpecin situations for whichAnyFeatureSpecwould be a good choice, when all or most tests need the same fixture objects that must be cleaned up afterwards. Note:FixtureAnyFeatureSpecis intended for use in special situations, with classAnyFeatureSpecused for general needs. For more insight into whereFixtureAnyFeatureSpecfits in the big picture, see thewithFixture(OneArgTest)subsection of the Shared fixtures section in the documentation for classAnyFeatureSpec.Class
FixtureAnyFeatureSpecbehaves similarly to classorg.scalatest.featurespec.AnyFeatureSpec, except that tests may have a fixture parameter. The type of the fixture parameter is defined by the abstractFixtureParamtype, which is a member of this class. This trait also has an abstractwithFixturemethod. ThiswithFixturemethod takes aOneArgTest, which is a nested trait defined as a member of this class.OneArgTesthas anapplymethod that takes aFixtureParam. Thisapplymethod is responsible for running a test. This class'srunTestmethod delegates the actual running of each test towithFixture(OneArgTest), passing in the test code to run via theOneArgTestargument. ThewithFixture(OneArgTest)method (abstract in this class) is responsible for creating the fixture argument and passing it to the test function.Subclasses of this class must, therefore, do three things differently from a plain old
org.scalatest.featurespec.AnyFeatureSpec:FixtureParamwithFixture(OneArgTest)methodIf the fixture you want to pass into your tests consists of multiple objects, you will need to combine them into one object to use this class. One good approach to passing multiple fixture objects is to encapsulate them in a case class. Here's an example:
To enable the stacking of traits that define
withFixture(NoArgTest), it is a good idea to letwithFixture(NoArgTest)invoke the test function instead of invoking the test function directly. To do so, you'll need to convert theOneArgTestto aNoArgTest. You can do that by passing the fixture object to thetoNoArgTestmethod ofOneArgTest. In other words, instead of writing “test(theFixture)”, you'd delegate responsibility for invoking the test function to thewithFixture(NoArgTest)method of the same instance by writing:Here's a complete example:
package org.scalatest.examples.featurespec.oneargtest import org.scalatest.featurespec import java.io._ class ExampleSpec extends featurespec.FixtureAnyFeatureSpec { case class FixtureParam(file: File, writer: FileWriter) def withFixture(test: OneArgTest) = { // create the fixture val file = File.createTempFile("hello", "world") val writer = new FileWriter(file) val theFixture = FixtureParam(file, writer) try { writer.write("ScalaTest is designed to be ") // set up the fixture withFixture(test.toNoArgTest(theFixture)) // "loan" the fixture to the test } finally writer.close() // clean up the fixture } Feature("Simplicity") { Scenario("User needs to read test code written by others") { f => f.writer.write("encourage clear code!") f.writer.flush() assert(f.file.length === 49) } Scenario("User needs to understand what the tests are doing") { f => f.writer.write("be easy to reason about!") f.writer.flush() assert(f.file.length === 52) } } }If a test fails, the
OneArgTestfunction will result in a Failed wrapping the exception describing the failure. To ensure clean up happens even if a test fails, you should invoke the test function from inside atryblock and do the cleanup in afinallyclause, as shown in the previous example.Sharing fixtures across classes
If multiple test classes need the same fixture, you can define the
FixtureParamandwithFixture(OneArgTest)implementations in a trait, then mix that trait into the test classes that need it. For example, if your application requires a database and your integration tests use that database, you will likely have many test classes that need a database fixture. You can create a "database fixture" trait that creates a database with a unique name, passes the connector into the test, then removes the database once the test completes. This is shown in the following example:package org.scalatest.examples.fixture.featurespec.sharing import java.util.concurrent.ConcurrentHashMap import org.scalatest.featurespec import DbServer._ import java.util.UUID.randomUUID object DbServer { // Simulating a database server type Db = StringBuffer private val databases = new ConcurrentHashMap[String, Db] def createDb(name: String): Db = { val db = new StringBuffer databases.put(name, db) db } def removeDb(name: String) { databases.remove(name) } } trait DbFixture { this: FixtureSuite => type FixtureParam = Db // Allow clients to populate the database after // it is created def populateDb(db: Db) {} def withFixture(test: OneArgTest) { val dbName = randomUUID.toString val db = createDb(dbName) // create the fixture try { populateDb(db) // setup the fixture withFixture(test.toNoArgTest(db)) // "loan" the fixture to the test } finally removeDb(dbName) // clean up the fixture } } class ExampleSpec extends featurespec.FixtureAnyFeatureSpec with DbFixture { override def populateDb(db: Db) { // setup the fixture db.append("ScalaTest is designed to ") } Feature("Simplicity") { Scenario("User needs to read test code written by others") { db => db.append("encourage clear code!") assert(db.toString === "ScalaTest is designed to encourage clear code!") } Scenario("User needs to understand what the tests are doing") { db => db.append("be easy to reason about!") assert(db.toString === "ScalaTest is designed to be easy to reason about!") } Scenario("User needs to write tests") { () => val buf = new StringBuffer buf.append("ScalaTest is designed to be ") buf.append("easy to learn!") assert(buf.toString === "ScalaTest is designed to be easy to learn!") } } }Often when you create fixtures in a trait like
DbFixture, you'll still need to enable individual test classes to "setup" a newly created fixture before it gets passed into the tests. A good way to accomplish this is to pass the newly created fixture into a setup method, likepopulateDbin the previous example, before passing it to the test function. Classes that need to perform such setup can override the method, as doesExampleSpec.If a test doesn't need the fixture, you can indicate that by providing a no-arg instead of a one-arg function, as is done in the third test in the previous example, “
Test code should be clear”. In other words, instead of starting your function literal with something like “db =>”, you'd start it with “() =>”. For such tests,runTestwill not invokewithFixture(OneArgTest). It will instead directly invokewithFixture(NoArgTest).Both examples shown above demonstrate the technique of giving each test its own "fixture sandbox" to play in. When your fixtures involve external side-effects, like creating files or databases, it is a good idea to give each file or database a unique name as is done in these examples. This keeps tests completely isolated, allowing you to run them in parallel if desired. You could mix
ParallelTestExecutioninto either of theseExampleSpecclasses, and the tests would run in parallel just fine.