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package scala.issues
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
import org.junit.Test
import scala.tools.asm.Opcodes
import scala.tools.nsc.backend.jvm.AsmUtils
import scala.tools.nsc.backend.jvm.CodeGenTools._
import org.junit.Assert._
import scala.collection.JavaConverters._
import scala.tools.partest.ASMConverters._
import scala.tools.testing.ClearAfterClass
object BytecodeTest extends ClearAfterClass.Clearable {
var compiler = newCompiler()
def clear(): Unit = { compiler = null }
}
@RunWith(classOf[JUnit4])
class BytecodeTest extends ClearAfterClass {
ClearAfterClass.stateToClear = BytecodeTest
val compiler = BytecodeTest.compiler
@Test
def t8731(): Unit = {
val code =
"""class C {
| def f(x: Int) = (x: @annotation.switch) match {
| case 1 => 0
| case 2 => 1
| case 3 => 2
| }
| final val K = 10
| def g(x: Int) = (x: @annotation.switch) match {
| case K => 0
| case 1 => 10
| case 2 => 20
| }
|}
""".stripMargin
val List(c) = compileClasses(compiler)(code)
assertTrue(getSingleMethod(c, "f").instructions.count(_.isInstanceOf[TableSwitch]) == 1)
assertTrue(getSingleMethod(c, "g").instructions.count(_.isInstanceOf[LookupSwitch]) == 1)
}
@Test
def t8926(): Unit = {
import scala.reflect.internal.util.BatchSourceFile
// this test cannot be implemented using partest because of its mixed-mode compilation strategy:
// partest first compiles all files with scalac, then the java files, and then again the scala
// using the output classpath. this shadows the bug SI-8926.
val annotA =
"""import java.lang.annotation.Retention;
|import java.lang.annotation.RetentionPolicy;
|@Retention(RetentionPolicy.RUNTIME)
|public @interface AnnotA { }
""".stripMargin
val annotB = "public @interface AnnotB { }"
val scalaSrc =
"""@AnnotA class A
|@AnnotB class B
""".stripMargin
val run = new compiler.Run()
run.compileSources(List(new BatchSourceFile("AnnotA.java", annotA), new BatchSourceFile("AnnotB.java", annotB), new BatchSourceFile("Test.scala", scalaSrc)))
val outDir = compiler.settings.outputDirs.getSingleOutput.get
val outfiles = (for (f <- outDir.iterator if !f.isDirectory) yield (f.name, f.toByteArray)).toList
def check(classfile: String, annotName: String) = {
val f = (outfiles collect { case (`classfile`, bytes) => AsmUtils.readClass(bytes) }).head
val descs = f.visibleAnnotations.asScala.map(_.desc).toList
assertTrue(descs.toString, descs exists (_ contains annotName))
}
check("A.class", "AnnotA")
// known issue SI-8928: the visibility of AnnotB should be CLASS, but annotation classes without
// a @Retention annotation are currently emitted as RUNTIME.
check("B.class", "AnnotB")
}
@Test
def t6288bJumpPosition(): Unit = {
val code =
"""object Case3 { // 01
| def unapply(z: Any): Option[Int] = Some(-1) // 02
| def main(args: Array[String]) { // 03
| ("": Any) match { // 04
| case x : String => // 05
| println("case 0") // 06 println and jump at 6
| case _ => // 07
| println("default") // 08 println and jump at 8
| } // 09
| println("done") // 10
| }
|}
""".stripMargin
val List(mirror, module) = compileClasses(compiler)(code)
val unapplyLineNumbers = getSingleMethod(module, "unapply").instructions.filter(_.isInstanceOf[LineNumber])
assert(unapplyLineNumbers == List(LineNumber(2, Label(0))), unapplyLineNumbers)
import Opcodes._
val expected = List(
LineNumber(4, Label(0)),
LineNumber(5, Label(5)),
Jump(IFNE, Label(11)),
Jump(GOTO, Label(20)),
LineNumber(6, Label(11)),
Invoke(INVOKEVIRTUAL, "scala/Predef$", "println", "(Ljava/lang/Object;)V", false),
Jump(GOTO, Label(33)),
LineNumber(5, Label(20)),
Jump(GOTO, Label(24)),
LineNumber(8, Label(24)),
Invoke(INVOKEVIRTUAL, "scala/Predef$", "println", "(Ljava/lang/Object;)V", false),
Jump(GOTO, Label(33)),
LineNumber(10, Label(33)),
Invoke(INVOKEVIRTUAL, "scala/Predef$", "println", "(Ljava/lang/Object;)V", false)
)
val mainIns = getSingleMethod(module, "main").instructions filter {
case _: LineNumber | _: Invoke | _: Jump => true
case _ => false
}
assertSameCode(mainIns, expected)
}
}
|
