Add V8 extra utils for promise state

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index b97c0cf265458b39b945e726c02b6eddf692567b..65e6135f8a074c5b3a661b94f12805c62aa22bd3 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -25486,6 +25486,12 @@ TEST(ExtrasUtilsObject) {
           .ToLocalChecked()
           .As<v8::Promise>();
   CHECK(rejected_but_handled_promise->HasHandler());
+
+  auto promise_states = result->Get(env.local(), v8_str("promiseStates"))
+                            .ToLocalChecked()
+                            .As<v8::String>();
+  String::Utf8Value promise_states_string(promise_states);
+  CHECK_EQ(0, strcmp(*promise_states_string, "pending fulfilled rejected"));
 }