junit5

Type Members

1. trait AssertionsForJUnit extends VersionSpecificAssertionsForJUnit

   

   Trait that contains ScalaTest's basic assertion methods, suitable for use with JUnit 5.

   Trait that contains ScalaTest's basic assertion methods, suitable for use with JUnit 5.

   The assertion methods provided in this trait look and behave exactly like the ones in Assertions, except instead of throwing TestFailedException they throw JUnitTestFailedError, which extends org.opentest4j.AssertionFailedError.

   JUnit 3 (release 3.8 and earlier) distinguishes between failures and errors. If a test fails because of a failed assertion, that is considered a failure. If a test fails for any other reason, either the test code or the application being tested threw an unexpected exception, that is considered an error. The way JUnit 3 decides whether an exception represents a failure or error is that only thrown junit.framework.AssertionFailedErrors are considered failures. Any other exception type is considered an error. The exception type thrown by the JUnit 3 assertion methods declared in junit.framework.Assert (such as assertEquals, assertTrue, and fail) is, therefore, AssertionFailedError.

   In JUnit 4, junit.framework.AssertionFailedError was made to extend java.lang.AssertionError, and the distinction between failures and errors was essentially dropped. However, some tools that integrate with JUnit carry on this distinction, so even if you are using JUnit 4 you may want to use this AssertionsForJUnit trait instead of plain-old ScalaTest Assertions.

   In JUnit 5, org.opentest4j.AssertionFailedError is used as test-related AssertionError instead.

2. class JUnitSuite extends JUnitSuiteLike

   

   A suite of tests that can be run with either JUnit or ScalaTest.

   A suite of tests that can be run with either JUnit or ScalaTest. This class allows you to write JUnit 5 tests with ScalaTest's more concise assertion syntax as well as JUnit's assertions (assertEquals, etc.). You create tests by defining methods that are annotated with Test, and can create fixtures with methods annotated with Before and After. For example:

   import org.scalatest.junit5.JUnitSuite
   import scala.collection.mutable.ListBuffer
   import _root_.org.junit.Test
   import _root_.org.junit.Before
   
   class TwoSuite extends JUnitSuite {
   
     var sb: StringBuilder = _
     var lb: ListBuffer[String] = _
   
     @Before def initialize() {
       sb = new StringBuilder("ScalaTest is ")
       lb = new ListBuffer[String]
     }
   
     @Test def verifyEasy() {
       sb.append("easy!")
       assert(sb.toString === "ScalaTest is easy!")
       assert(lb.isEmpty)
       lb += "sweet"
     }
   
     @Test def verifyFun() {
       sb.append("fun!")
       assert(sb.toString === "ScalaTest is fun!")
       assert(lb.isEmpty)
     }
   }
   

   To execute JUnitSuites with ScalaTest's Runner, you must include JUnit 5's jar file on the class path or runpath. This version of JUnitSuite was tested with JUnit version 5.9.

   Instances of this class are not thread safe.

3. trait JUnitSuiteLike extends Suite with AssertionsForJUnit

   

   Implementation trait for class JUnitSuite, which represents a suite of tests that can be run with either JUnit 5 or ScalaTest.

   Implementation trait for class JUnitSuite, which represents a suite of tests that can be run with either JUnit 5 or ScalaTest.

   JUnitSuite is a class, not a trait, to minimize compile time given there is a slight compiler overhead to mixing in traits compared to extending classes. If you need to mix the behavior of JUnitSuite into some other class, you can use this trait instead, because class JUnitSuite does nothing more than extend this trait.

   See the documentation of the class for a detailed overview of JUnitSuite.

4. class JUnitTestFailedError extends AssertionFailedError with StackDepth with ModifiableMessage[JUnitTestFailedError] with PayloadField with ModifiablePayload[JUnitTestFailedError]

   

   Exception that indicates a test failed in JUnit 5.

   Exception that indicates a test failed in JUnit 5.

   The purpose of this exception is to encapsulate the same stack depth information provided by TestFailedException, which is used when running with ScalaTest, but be reported as a failure not an error when running with JUnit. The stack depth information indicates which line of test code failed, so that when running with ScalaTest information can be presented to the user that makes it quick to find the failing line of test code. (In other words, when running with ScalaTest the user need not scan through the stack trace to find the correct filename and line number of the failing test.)

   JUnit distinguishes between failures and errors. If a test fails because of a failed assertion, that is considered a failure in JUnit. If a test fails for any other reason, either the test code or the application being tested threw an unexpected exception, that is considered an error in JUnit. This class differs from TestFailedException in that it extends org.opentest4j.AssertionFailedError. Instances of this class are thrown by the assertions provided by AssertionsForJUnit.

   The way JUnit 3 (JUnit 3.8 and earlier releases) decided whether an exception represented a failure or error is that only thrown junit.framework.AssertionFailedErrors were considered failures. Any other exception type was considered an error. The exception type thrown by the JUnit 3 assertion methods declared in junit.framework.Assert (such as assertEquals, assertTrue, and fail) was, therefore, AssertionFailedError. In JUnit 4, junit.framework.AssertionFailedError was made to extend java.lang.AssertionError, and the distinction between failures and errors was essentially dropped. In JUnit 5, org.opentest4j.AssertionFailedError is used instead as common base class for test-related AssertionErrors.

   Exceptions thrown

   NullArgumentException if either message or cause is null, or Some(null).

5. class ScalaTestClassDescriptor extends AbstractTestDescriptor

   

   TestDescriptor for ScalaTest suite.

   TestDescriptor for ScalaTest suite.

6. class ScalaTestDescriptor extends AbstractTestDescriptor

   

   TestDescriptor for a test in ScalaTest suite.

   TestDescriptor for a test in ScalaTest suite.

7. class ScalaTestEngine extends TestEngine

   

   ScalaTest implementation for JUnit 5 Test Engine.

8. trait VersionSpecificAssertionsForJUnit extends Assertions