Add parser finalization step

test/unittests/test-utils.h

Index: test/unittests/test-utils.h
diff --git a/test/unittests/test-utils.h b/test/unittests/test-utils.h
index 433a1f2f40483db384e601484e720faf792bd809..c5788e2478a824d1c63f557a0a82d5949e51c619 100644
--- a/test/unittests/test-utils.h
+++ b/test/unittests/test-utils.h
@@ -43,6 +43,10 @@ class TestWithContext : public virtual TestWithIsolate {
 
   const Local<Context>& context() const { return context_; }
 
+  v8::internal::Isolate* i_isolate() const {
+    return reinterpret_cast<v8::internal::Isolate*>(isolate());
+  }
+
  private:
   Local<Context> context_;
   Context::Scope context_scope_;