test_symbols-01.js

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/* Any copyright is dedicated to the Public Domain.

   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

/**

 * Test that we can represent ES6 Symbols over the RDP.

*/

const URL = "foo.js";

add_task(

  threadFrontTest(async ({ threadFront, debuggee }) => {

    await testSymbols(threadFront, debuggee);

})

);

async function testSymbols(threadFront, debuggee) {

  const evalCode = () => {

    /* eslint-disable mozilla/var-only-at-top-level, no-unused-vars */

    // prettier-ignore

    Cu.evalInSandbox(

      "(" + function () {

        var symbolWithName = Symbol("Chris");

        var symbolWithoutName = Symbol();

        var iteratorSymbol = Symbol.iterator;

        debugger;

      } + "())",

      debuggee,

      "1.8",

      URL,

);

    /* eslint-enable mozilla/var-only-at-top-level, no-unused-vars */

};

  const packet = await executeOnNextTickAndWaitForPause(evalCode, threadFront);

  const environment = await packet.frame.getEnvironment();

  const { symbolWithName, symbolWithoutName, iteratorSymbol } =

    environment.bindings.variables;

  equal(symbolWithName.value.type, "symbol");

  equal(symbolWithName.value.name, "Chris");

  equal(symbolWithoutName.value.type, "symbol");

  ok(!("name" in symbolWithoutName.value));

  equal(iteratorSymbol.value.type, "symbol");

  equal(iteratorSymbol.value.name, "Symbol.iterator");