path: root/test/test/DottyBytecodeTests.scala

package test

import org.junit.Assert._
import org.junit.Test

class TestBCode extends DottyBytecodeTest {
  import ASMConverters._
  @Test def nullChecks = {
    val source = """
                 |class Foo {
                 |  def foo(x: AnyRef): Int = {
                 |    val bool = x == null
                 |    if (x != null) 1
                 |    else 0
                 |  }
                 |}
                 """.stripMargin

    checkBCode(source) { dir =>
      val clsIn      = dir.lookupName("Foo.class", directory = false).input
      val clsNode    = loadClassNode(clsIn)
      val methodNode = getMethod(clsNode, "foo")
      correctNumberOfNullChecks(2, methodNode.instructions)
    }
  }

  /** This test verifies that simple matches are transformed if possible
   *  despite no annotation
   */
  @Test def basicTransformNonAnnotated = {
    val source = """
                 |object Foo {
                 |  def foo(i: Int) = i match {
                 |    case 2 => println(2)
                 |    case 1 => println(1)
                 |  }
                 |}""".stripMargin

    checkBCode(source) { dir =>
      val moduleIn   = dir.lookupName("Foo$.class", directory = false)
      val moduleNode = loadClassNode(moduleIn.input)
      val methodNode = getMethod(moduleNode, "foo")
      assert(verifySwitch(methodNode))
    }
  }

  /** This test verifies that simple matches with `@switch` annotations are
   *  indeed transformed to a switch
   *
   *  FIXME: once issue#1258 is resolved, this should be enabled!
   */
  //@Test def basicTransfromAnnotated = {
  //  val source = """
  //               |object Foo {
  //               |  import scala.annotation.switch
  //               |  def foo(i: Int) = (i: @switch) match {
  //               |    case 2 => println(2)
  //               |    case 1 => println(1)
  //               |  }
  //               |}""".stripMargin

  //  checkBCode(source) { dir =>
  //    val moduleIn   = dir.lookupName("Foo$.class", directory = false)
  //    val moduleNode = loadClassNode(moduleIn.input)
  //    val methodNode = getMethod(moduleNode, "foo")
  //    assert(verifySwitch(methodNode))
  //  }
  //}
}