[api] Introduce ReturnValue::Get

test/cctest/test-api.h

Index: test/cctest/test-api.h
diff --git a/test/cctest/test-api.h b/test/cctest/test-api.h
index 379fe9c9c2810cc8fb8930c5a9766927f8f136ea..8887a8a976558d14ac1482b22968f2e2831a8719 100644
--- a/test/cctest/test-api.h
+++ b/test/cctest/test-api.h
@@ -18,6 +18,12 @@ static void CheckReturnValue(const T& t, i::Address callback) {
   CHECK((*o)->IsTheHole() || (*o)->IsUndefined());
   // Verify reset
   bool is_runtime = (*o)->IsTheHole();
+  if (is_runtime) {
+    CHECK(rv.Get()->IsUndefined());
+  } else {
+    i::Handle<i::Object> v = v8::Utils::OpenHandle(*rv.Get());
+    CHECK_EQ(*v, *o);
+  }
   rv.Set(true);
   CHECK(!(*o)->IsTheHole() && !(*o)->IsUndefined());
   rv.Set(v8::Local<v8::Object>());