3 files changed, 63 insertions, 1 deletions
diff --git a/src/test/scala/scala/async/run/SyncOptimizationSpec.scala b/src/test/scala/scala/async/run/SyncOptimizationSpec.scala
new file mode 100644
index 0000000..dd649f4
--- /dev/null
+++ b/src/test/scala/scala/async/run/SyncOptimizationSpec.scala
@@ -0,0 +1,28 @@
+package scala.async.run
+
+import org.junit.Test
+import scala.async.Async._
+import scala.concurrent._
+import scala.concurrent.duration._
+import ExecutionContext.Implicits._
+
+class SyncOptimizationSpec {
+  @Test
+  def awaitOnCompletedFutureRunsOnSameThread: Unit = {
+
+    def stackDepth = Thread.currentThread().getStackTrace.size
+
+    val future = async {
+      val thread1 = Thread.currentThread
+      val stackDepth1 = stackDepth
+
+      val f = await(Future.successful(1))
+      val thread2 = Thread.currentThread
+      val stackDepth2 = stackDepth
+      assert(thread1 == thread2)
+      assert(stackDepth1 == stackDepth2)
+    }
+    Await.result(future, 10.seconds)
+  }
+
+}
diff --git a/src/test/scala/scala/async/run/futures/FutureSpec.scala b/src/test/scala/scala/async/run/futures/FutureSpec.scala
index 1761db5..362303e 100644
--- a/src/test/scala/scala/async/run/futures/FutureSpec.scala
+++ b/src/test/scala/scala/async/run/futures/FutureSpec.scala
@@ -134,6 +134,13 @@ class FutureSpec {
       Await.result(future1, defaultTimeout) mustBe ("10-14")
       intercept[NoSuchElementException] { Await.result(future2, defaultTimeout) }
     }
+
+    @Test def mini() {
+      val future4 = async {
+        await(Future.successful(0)).toString
+      }
+      Await.result(future4, defaultTimeout)
+    }
     
     @Test def `recover from exceptions`() {
       val future1 = Future(5)
@@ -531,7 +538,6 @@ class FutureSpec {
       val f = async { await(future(5)) / 0 }
       Await.ready(f, defaultTimeout).value.get.toString mustBe expected.toString
     }
-  
 }
 
 
diff --git a/src/test/scala/scala/async/run/stackoverflow/StackOverflowSpec.scala b/src/test/scala/scala/async/run/stackoverflow/StackOverflowSpec.scala
new file mode 100644
index 0000000..2dc9b92
--- /dev/null
+++ b/src/test/scala/scala/async/run/stackoverflow/StackOverflowSpec.scala
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2012-2014 Typesafe Inc. <http://www.typesafe.com>
+ */
+
+package scala.async
+package run
+package stackoverflow
+
+import org.junit.Test
+import scala.async.internal.AsyncId
+
+
+class StackOverflowSpec {
+
+  @Test
+  def stackSafety() {
+    import AsyncId._
+    async {
+      var i = 100000000
+      while (i > 0) {
+        if (false) {
+          await(())
+        }
+        i -= 1
+      }
+    }
+  }
+}