11cb0ef41Sopenharmony_ci// Flags: --expose-internals 21cb0ef41Sopenharmony_ci'use strict'; 31cb0ef41Sopenharmony_ci 41cb0ef41Sopenharmony_ciconst common = require('../common'); 51cb0ef41Sopenharmony_ci 61cb0ef41Sopenharmony_ciconst assert = require('assert'); 71cb0ef41Sopenharmony_ciconst { 81cb0ef41Sopenharmony_ci JSTransferable, 91cb0ef41Sopenharmony_ci} = require('internal/worker/js_transferable'); 101cb0ef41Sopenharmony_ciconst { E, F } = require('internal/test/transfer'); 111cb0ef41Sopenharmony_ci 121cb0ef41Sopenharmony_ci// Tests that F is transferable even tho it does not directly, 131cb0ef41Sopenharmony_ci// observably extend the JSTransferable class. 141cb0ef41Sopenharmony_ci 151cb0ef41Sopenharmony_ciconst mc = new MessageChannel(); 161cb0ef41Sopenharmony_ci 171cb0ef41Sopenharmony_cimc.port1.onmessageerror = common.mustNotCall(); 181cb0ef41Sopenharmony_ci 191cb0ef41Sopenharmony_cimc.port1.onmessage = common.mustCall(({ data }) => { 201cb0ef41Sopenharmony_ci assert(!(data instanceof JSTransferable)); 211cb0ef41Sopenharmony_ci assert(data instanceof F); 221cb0ef41Sopenharmony_ci assert(data instanceof E); 231cb0ef41Sopenharmony_ci assert.strictEqual(data.b, 1); 241cb0ef41Sopenharmony_ci mc.port1.close(); 251cb0ef41Sopenharmony_ci}); 261cb0ef41Sopenharmony_ci 271cb0ef41Sopenharmony_cimc.port2.postMessage(new F(1)); 28