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/**
* Copyright (C) 2012 Typesafe Inc. <http://www.typesafe.com>
*/
package scala.async
package run
package anf
import language.{reflectiveCalls, postfixOps}
import scala.concurrent.{Future, ExecutionContext, future, Await}
import scala.concurrent.duration._
import scala.async.Async.{async, await}
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
class AnfTestClass {
import ExecutionContext.Implicits.global
def base(x: Int): Future[Int] = future {
x + 2
}
def m(y: Int): Future[Int] = async {
val f = base(y)
await(f)
}
def m2(y: Int): Future[Int] = async {
val f = base(y)
val f2 = base(y + 1)
await(f) + await(f2)
}
def m3(y: Int): Future[Int] = async {
val f = base(y)
var z = 0
if (y > 0) {
z = await(f) + 2
} else {
z = await(f) - 2
}
z
}
def m4(y: Int): Future[Int] = async {
val f = base(y)
val z = if (y > 0) {
await(f) + 2
} else {
await(f) - 2
}
z + 1
}
}
@RunWith(classOf[JUnit4])
class AnfTransformSpec {
@Test
def `simple ANF transform`() {
val o = new AnfTestClass
val fut = o.m(10)
val res = Await.result(fut, 2 seconds)
res mustBe (12)
}
@Test
def `simple ANF transform 2`() {
val o = new AnfTestClass
val fut = o.m2(10)
val res = Await.result(fut, 2 seconds)
res mustBe (25)
}
@Test
def `simple ANF transform 3`() {
val o = new AnfTestClass
val fut = o.m3(10)
val res = Await.result(fut, 2 seconds)
res mustBe (14)
}
@Test
def `ANF transform of assigning the result of an if-else`() {
val o = new AnfTestClass
val fut = o.m4(10)
val res = Await.result(fut, 2 seconds)
res mustBe (15)
}
}
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