improve docs and Promise impl

- scaladoc the exceptions thrown by Await.* and Awaitable.*
- move intercept[Exception] into partest’s TestUtil object
- improve Promise.tryAwait implementation following Viktor’s comments
  and make use of Deadline to avoid calling System.nanoTime too often

1 files changed, 11 insertions, 1 deletions

diff --git a/src/partest/scala/tools/partest/TestUtil.scala b/src/partest/scala/tools/partest/TestUtil.scala
index b86a8e2c7f..146e6fc69f 100644
--- a/src/partest/scala/tools/partest/TestUtil.scala
+++ b/src/partest/scala/tools/partest/TestUtil.scala
@@ -1,5 +1,7 @@
 package scala.tools.partest
 
+import reflect.{ classTag, ClassTag }
+
 trait TestUtil {
   /** Given function and block of code, evaluates code block,
    *  calls function with nanoseconds elapsed, and returns block result.
@@ -29,8 +31,16 @@ trait TestUtil {
 
     assert(mult <= acceptableMultiple, "Performance difference too great: multiple = " + mult)
   }
+
+  def intercept[T <: Exception : ClassTag](code: => Unit): Unit =
+    try {
+      code
+      assert(false, "did not throw " + classTag[T])
+    } catch {
+      case ex: Exception if classTag[T].runtimeClass isInstance ex =>
+    }
 }
 
 object TestUtil extends TestUtil {
 
-}
\ No newline at end of file
+}