package scala.tools.nsc.backend.jvm

import org.junit.Assert.assertEquals

import org.junit.Test

import java.lang.reflect.Member

class ClassfileParserTest {

@Test

def noConstantPoolLag(): Unit = {

def constNames(ms: List[Member]) = ms.collect {

case f if f.getName.startsWith("CONSTANT_") => f.getName

}.sorted

val toScalac = Map(

"CONSTANT_INTERFACE_METHODREF" -> "CONSTANT_INTFMETHODREF",

"CONSTANT_INVOKE_DYNAMIC" -> "CONSTANT_INVOKEDYNAMIC",

"CONSTANT_METHOD_HANDLE" -> "CONSTANT_METHODHANDLE",

"CONSTANT_METHOD_TYPE" -> "CONSTANT_METHODTYPE",

"CONSTANT_NAME_AND_TYPE" -> "CONSTANT_NAMEANDTYPE",

).withDefault(x => x)

val asmConsts = constNames(Class.forName("scala.tools.asm.Symbol").getDeclaredFields.toList)

.map(_.stripSuffix("_TAG"))

.map(toScalac)

.::("CONSTANT_UNICODE")

.sorted

val scalacConsts = constNames(scala.reflect.internal.ClassfileConstants.getClass.getDeclaredMethods.toList)

assertEquals(scalacConsts, asmConsts)

}

}