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/*
* Copyright (C) 2012 Typesafe Inc. <http://www.typesafe.com>
*/
package scala.async
package run
package match0
import language.{reflectiveCalls, postfixOps}
import scala.concurrent.{Future, ExecutionContext, future, Await}
import scala.concurrent.duration._
import scala.async.Async.{async, await}
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
import org.junit.Test
class TestMatchClass {
import ExecutionContext.Implicits.global
def m1(x: Int): Future[Int] = future {
x + 2
}
def m2(y: Int): Future[Int] = async {
val f = m1(y)
var z = 0
y match {
case 10 =>
val x1 = await(f)
z = x1 + 2
case 20 =>
val x2 = await(f)
z = x2 - 2
}
z
}
def m3(y: Int): Future[Int] = async {
val f = m1(y)
var z = 0
y match {
case 0 =>
val x2 = await(f)
z = x2 - 2
case 1 =>
val x1 = await(f)
z = x1 + 2
}
z
}
}
@RunWith(classOf[JUnit4])
class MatchSpec {
@Test def `support await in a simple match expression`() {
val o = new TestMatchClass
val fut = o.m2(10) // matches first case
val res = Await.result(fut, 2 seconds)
res mustBe (14)
}
@Test def `support await in a simple match expression 2`() {
val o = new TestMatchClass
val fut = o.m3(1) // matches second case
val res = Await.result(fut, 2 seconds)
res mustBe (5)
}
@Test def `support await in a match expression with binds`() {
val result = AsyncId.async {
val x = 1
Option(x) match {
case op @ Some(x) =>
assert(op == Some(1))
x + AsyncId.await(x)
case None => AsyncId.await(0)
}
}
result mustBe (2)
}
@Test def `support await referring to pattern matching vals`() {
import AsyncId.{async, await}
val result = async {
val x = 1
val opt = Some("")
await(0)
val o @ Some(y) = opt
{
val o @ Some(y) = Some(".")
}
await(0)
await((o, y.isEmpty))
}
result mustBe ((Some(""), true))
}
@Test def `await in scrutinee`() {
import AsyncId.{async, await}
val result = async {
await(if ("".isEmpty) await(1) else ???) match {
case x if x < 0 => ???
case y: Int => y * await(3)
}
}
result mustBe (3)
}
}
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