OneInstancePerTest

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

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

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

Runs this suite of tests.

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

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.

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.

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.

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 initializing an external database.

Construct a new instance of this Suite.

This trait's implementation of runTests invokes this method to create a new instance of this Suite for each test. This trait's implementation of this method uses reflection to call this.getClass.newInstance. This approach will succeed only if this Suite's class has a public, no-arg constructor. In most cases this is likely to be true, because to be instantiated by ScalaTest's Runner a Suite needs a public, no-arg constructor. However, this will not be true of any Suite defined as an inner class of another class or trait, because every constructor of an inner class type takes a reference to the enclosing instance. In such cases, and in cases where a Suite class is explicitly defined without a public, no-arg constructor, you will need to override this method to construct a new instance of the Suite in some other way.

Here's an example of how you could override newInstance to construct a new instance of an inner class:

import org.scalatest.Suite

class Outer {
  class InnerSuite extends Suite with OneInstancePerTest {
    def testOne() {}
    def testTwo() {}
    override def newInstance = new InnerSuite
  }
}

Modifies the behavior of super.runTest to facilitate running each test in its own instance of this Suite's class.

This trait's implementation of runTest uses the runTestInNewInstance flag of the passed Args object to determine whether this instance is the general instance responsible for running all tests in the suite (runTestInNewInstance is true), or a test-specific instance responsible for running just one test (runTestInNewInstance is false). Note that these Boolean values are reverse those used by runTests, because runTests always inverts the Boolean value of runTestInNewInstance when invoking runTest.

If runTestInNewInstance is true, this trait's implementation of this method creates a new instance of this class (by invoking newInstance on itself), then invokes run on the new instance, passing in testName, wrapped in a Some, and args unchanged. (I.e., the Args object passed to runTest is forwarded as is to run on the new instance, including with runTestInNewInstance set.) If the invocation of either newInstance on this Suite or run on a newly created instance of this Suite completes abruptly with an exception, then this runTests method will complete abruptly with the same exception.

If runTestInNewInstance is false, this trait's implementation of this method simply invokes super.runTest, passing along the same testName and args objects.

Modifies the behavior of super.runTests to facilitate running each test in its own instance of this Suite's class.

This trait's implementation of runTest uses the runTestInNewInstance flag of the passed Args object to determine whether this instance is the general instance responsible for running all tests in the suite (runTestInNewInstance is false), or a test-specific instance responsible for running just one test (runTestInNewInstance is true). Note that these Boolean values are reverse those used by runTest, because runTests always inverts the Boolean value of runTestInNewInstance when invoking runTest.

If runTestInNewInstance is false, this trait's implementation of this method will invoke super.runTests, passing along testName and args, but with the runTestInNewInstance flag set to true. By setting runTestInNewInstance to true, runTests is telling runTest to create a new instance to run each test.

If runTestInNewInstance is true, this trait's implementation of this method will invoke runTest directly, passing in testName.get and the args object, with the runTestInNewInstance flag set to false. By setting runTestInNewInstance to false, runTests is telling runTest that this is the test-specific instance, so it should just run the specified test.