From c15af267fc7ed5dc7ef40428d738dd5679606f66 Mon Sep 17 00:00:00 2001 From: phaller Date: Thu, 1 Nov 2012 19:51:07 +0100 Subject: Add test for await in nested if-else expression --- test/files/run/if-else1/MinimalScalaTest.scala | 102 +++++++++++++++++++ test/files/run/if-else1/if-else1.scala | 132 +++++++++++++++++++++++++ 2 files changed, 234 insertions(+) create mode 100644 test/files/run/if-else1/MinimalScalaTest.scala create mode 100644 test/files/run/if-else1/if-else1.scala (limited to 'test') diff --git a/test/files/run/if-else1/MinimalScalaTest.scala b/test/files/run/if-else1/MinimalScalaTest.scala new file mode 100644 index 0000000..91de1fc --- /dev/null +++ b/test/files/run/if-else1/MinimalScalaTest.scala @@ -0,0 +1,102 @@ +import language.reflectiveCalls +import language.postfixOps +import language.implicitConversions + +import scala.reflect.{ ClassTag, classTag } + +import scala.collection.mutable +import scala.concurrent.{ Future, Awaitable, CanAwait } +import java.util.concurrent.{ TimeoutException, CountDownLatch, TimeUnit } +import scala.concurrent.duration.Duration + + + +trait Output { + val buffer = new StringBuilder + + def bufferPrintln(a: Any): Unit = buffer.synchronized { + buffer.append(a.toString + "\n") + } +} + + +trait MinimalScalaTest extends Output { + + val throwables = mutable.ArrayBuffer[Throwable]() + + def check() { + if (throwables.nonEmpty) println(buffer.toString) + } + + implicit def stringops(s: String) = new { + + def should[U](snippets: =>U): U = { + bufferPrintln(s + " should:") + snippets + } + + def in[U](snippet: =>U): Unit = { + try { + bufferPrintln("- " + s) + snippet + bufferPrintln("[OK] Test passed.") + } catch { + case e: Throwable => + bufferPrintln("[FAILED] " + e) + bufferPrintln(e.getStackTrace().mkString("\n")) + throwables += e + } + } + + } + + implicit def objectops(obj: Any) = new { + + def mustBe(other: Any) = assert(obj == other, obj + " is not " + other) + def mustEqual(other: Any) = mustBe(other) + + } + + def intercept[T <: Throwable: ClassTag](body: =>Any): T = { + try { + body + throw new Exception("Exception of type %s was not thrown".format(classTag[T])) + } catch { + case t: Throwable => + if (classTag[T].runtimeClass != t.getClass) throw t + else t.asInstanceOf[T] + } + } + + def checkType[T: ClassTag, S](in: Future[T], refclasstag: ClassTag[S]): Boolean = classTag[T] == refclasstag +} + + +object TestLatch { + val DefaultTimeout = Duration(5, TimeUnit.SECONDS) + + def apply(count: Int = 1) = new TestLatch(count) +} + + +class TestLatch(count: Int = 1) extends Awaitable[Unit] { + private var latch = new CountDownLatch(count) + + def countDown() = latch.countDown() + def isOpen: Boolean = latch.getCount == 0 + def open() = while (!isOpen) countDown() + def reset() = latch = new CountDownLatch(count) + + @throws(classOf[TimeoutException]) + def ready(atMost: Duration)(implicit permit: CanAwait) = { + val opened = latch.await(atMost.toNanos, TimeUnit.NANOSECONDS) + if (!opened) throw new TimeoutException("Timeout of %s." format (atMost.toString)) + this + } + + @throws(classOf[Exception]) + def result(atMost: Duration)(implicit permit: CanAwait): Unit = { + ready(atMost) + } + +} diff --git a/test/files/run/if-else1/if-else1.scala b/test/files/run/if-else1/if-else1.scala new file mode 100644 index 0000000..296a077 --- /dev/null +++ b/test/files/run/if-else1/if-else1.scala @@ -0,0 +1,132 @@ +/** + * Copyright (C) 2012 Typesafe Inc. + */ + +import language.{ reflectiveCalls, postfixOps } +import scala.concurrent.{ Future, ExecutionContext, future, Await } +import scala.concurrent.duration._ +import scala.async.Async.{ async, await } + +object Test extends App { + + IfElse1Spec.check() + +} + +class TestIfElse1Class { + import ExecutionContext.Implicits.global + + def base(x: Int): Future[Int] = future { + Thread.sleep(1000) + x + 2 + } + + def m1(y: Int): Future[Int] = async { + val f = base(y) + var z = 0 + if (y > 0) { + if (y > 100) + 5 + else { + val x1 = await(f) + z = x1 + 2 + } + } else { + val x2 = await(f) + z = x2 - 2 + } + z + } + + def m2(y: Int): Future[Int] = async { + val f = base(y) + var z = 0 + if (y > 0) { + if (y < 100) { + val x1 = await(f) + z = x1 + 2 + } + else + 5 + } else { + val x2 = await(f) + z = x2 - 2 + } + z + } + + def m3(y: Int): Future[Int] = async { + val f = base(y) + var z = 0 + if (y < 0) { + val x2 = await(f) + z = x2 - 2 + } else { + if (y > 100) + 5 + else { + val x1 = await(f) + z = x1 + 2 + } + } + z + } + + def m4(y: Int): Future[Int] = async { + val f = base(y) + var z = 0 + if (y < 0) { + val x2 = await(f) + z = x2 - 2 + } else { + if (y < 100) { + val x1 = await(f) + z = x1 + 2 + } else + 5 + } + z + } + +} + + +object IfElse1Spec extends MinimalScalaTest { + + "An async method" should { + "support await in a nested if-else expression" in { + val o = new TestIfElse1Class + val fut = o.m1(10) + val res = Await.result(fut, 2 seconds) + res mustBe(14) + } + } + + "An async method" should { + "support await in a nested if-else expression" in { + val o = new TestIfElse1Class + val fut = o.m2(10) + val res = Await.result(fut, 2 seconds) + res mustBe(14) + } + } + + "An async method" should { + "support await in a nested if-else expression" in { + val o = new TestIfElse1Class + val fut = o.m3(10) + val res = Await.result(fut, 2 seconds) + res mustBe(14) + } + } + + "An async method" should { + "support await in a nested if-else expression" in { + val o = new TestIfElse1Class + val fut = o.m4(10) + val res = Await.result(fut, 2 seconds) + res mustBe(14) + } + } + +} -- cgit v1.2.3