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-rw-r--r--Test/dafny3/OpaqueTrees.dfy3
1 files changed, 3 insertions, 0 deletions
diff --git a/Test/dafny3/OpaqueTrees.dfy b/Test/dafny3/OpaqueTrees.dfy
index a08d0b68..53540c1d 100644
--- a/Test/dafny3/OpaqueTrees.dfy
+++ b/Test/dafny3/OpaqueTrees.dfy
@@ -1,3 +1,6 @@
+// RUN: %dafny /compile:0 /dprint:"%t.dprint" "%s" > "%t"
+// RUN: %diff "%s.expect" "%t"
+
datatype Tree<T> = Leaf(T) | Node(Tree, Tree)
function {:opaque} size(t: Tree): nat