Black box top-level IO fix (#655)

1 files changed, 10 insertions, 0 deletions

diff --git a/src/test/scala/chiselTests/Direction.scala b/src/test/scala/chiselTests/Direction.scala
index 9b353840..49d0ab77 100644
--- a/src/test/scala/chiselTests/Direction.scala
+++ b/src/test/scala/chiselTests/Direction.scala
@@ -36,6 +36,12 @@ class BadSubDirection extends DirectionHaver {
   io.inBundle.out := 0.U
 }
 
+class TopDirectionOutput extends Module {
+  val io = IO(Output(new DirectionedBundle))
+  io.in := 42.U
+  io.out := 117.U
+}
+
 class DirectionSpec extends ChiselPropSpec with Matchers {
 
   //TODO: In Chisel3 these are actually FIRRTL errors. Remove from tests?
@@ -52,4 +58,8 @@ class DirectionSpec extends ChiselPropSpec with Matchers {
      elaborate(new BadSubDirection)
     }
   }
+
+  property("Top-level forced outputs should be assignable") {
+    elaborate(new TopDirectionOutput)
+  }
 }