Fix for #1861: Add fall-back to CPS for all unsupported uses of await

1 files changed, 102 insertions, 0 deletions

diff --git a/test/pending/run/fallback0/MinimalScalaTest.scala b/test/pending/run/fallback0/MinimalScalaTest.scala
new file mode 100644
index 0000000..91de1fc
--- /dev/null
+++ b/test/pending/run/fallback0/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)
+  }
+  
+}