Function constructAndStore

test/fixtures/wpt/encoding/streams/realms.window.js:103–110

(what)

// writeRealm. Returns the id that can be used to access the object in those
// realms. |what| can contain constructor arguments.
async function constructAndStore(what) {
  const objId = id();
  // Call |constructorRealm|'s constructor from inside |constructedRealm|.
  writeRealm[objId] = await evalInRealmAndReturn(
      constructedRealm, `new parent.constructorRealm.${what}`);
  readRealm[objId] = writeRealm[objId];
  return objId;
}

// Calls read() on the readable side of the TransformStream stored in
// readRealm[objId]. Locks the readable side as a side-effect.