A suite of tests that can be run with either JUnit 3 or ScalaTest. This trait allows you to write JUnit 3 tests with ScalaTest's more concise assertion syntax as well as JUnit's assertions (assertEquals, etc.). You create tests by defining methods that start with test, and can create fixtures with methods named setUp and tearDown. For example:

 import org.scalatest.junit.JUnit3Suite
 import scala.collection.mutable.ListBuffer

 class TwoSuite extends JUnit3Suite {

   var sb: StringBuilder = _
   var lb: ListBuffer[String] = _

   override def setUp() {
     sb = new StringBuilder("ScalaTest is ")
     lb = new ListBuffer[String]
   }

   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)
   }
 }