/*
 * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
 * that can be found in the LICENSE file.
 */
// WITH_STDLIB
import kotlin.test.*

//--- Test "eqeq" -------------------------------------------------------------//

fun check_eqeq(a: Any?) = a == null

fun null_check_eqeq1() : Boolean {
  return check_eqeq(Any())
}

fun null_check_eqeq2() : Boolean {
  return check_eqeq(null)
}

//--- Test "eqeqeq" -----------------------------------------------------------//

fun check_eqeqeq(a: Any?) = a === null

fun null_check_eqeqeq1() : Boolean {
  return check_eqeqeq(Any())
}

fun null_check_eqeqeq2() : Boolean {
  return check_eqeqeq(null)
}

fun box(): String {
  if (null_check_eqeq1())    return "FAIL null_check_eqeq1()"
  if (!null_check_eqeq2())   return "FAIL !null_check_eqeq2()"
  if (null_check_eqeqeq1())  return "FAIL null_check_eqeqeq1()"
  if (!null_check_eqeqeq2()) return "FAIL !null_check_eqeqeq2()"

  return "OK"
}