test_envChain_frameScript.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

// Verify the environment chain for frame scripts described in

// js/src/vm/EnvironmentObject.h.

const { XPCShellContentUtils } = ChromeUtils.importESModule(

  "resource://testing-common/XPCShellContentUtils.sys.mjs"

);

XPCShellContentUtils.init(this);

add_task(async function unique_scope() {

  const page = await XPCShellContentUtils.loadContentPage("about:blank", {

    remote: true,

});

  const envsPromise = new Promise(resolve => {

    Services.mm.addMessageListener("unique-envs-result", msg => {

      resolve(msg.data);

});

});

  const sharePromise = new Promise(resolve => {

    Services.mm.addMessageListener("unique-share-result", msg => {

      resolve(msg.data);

});

});

  const runInUniqueScope = true;

  const runInGlobalScope = !runInUniqueScope;

  Services.mm.loadFrameScript(`data:,

var unique_qualified = 10;

unique_unqualified = 20;

let unique_lexical = 30;

this.unique_prop = 40;

const funcs = Cu.getJSTestingFunctions();

const envs = [];

let env = funcs.getInnerMostEnvironmentObject();

while (env) {

  envs.push({

    type: funcs.getEnvironmentObjectType(env) || "*BackstagePass*",

    qualified: !!Object.getOwnPropertyDescriptor(env, "unique_qualified"),

    unqualified: !!Object.getOwnPropertyDescriptor(env, "unique_unqualified"),

    lexical: !!Object.getOwnPropertyDescriptor(env, "unique_lexical"),

    prop: !!Object.getOwnPropertyDescriptor(env, "unique_prop"),

});

  env = funcs.getEnclosingEnvironmentObject(env);

sendSyncMessage("unique-envs-result", envs);

`, false, runInGlobalScope);

  Services.mm.loadFrameScript(`data:,

sendSyncMessage("unique-share-result", {

  unique_qualified: typeof unique_qualified,

  unique_unqualified: typeof unique_unqualified,

  unique_lexical: typeof unique_lexical,

  unique_prop: this.unique_prop,

});

`, false, runInGlobalScope);

  const envs = await envsPromise;

  const share = await sharePromise;

  Assert.equal(envs.length, 5);

  let i = 0, env;

  env = envs[i]; i++;

  Assert.equal(env.type, "NonSyntacticLexicalEnvironmentObject");

  Assert.equal(env.qualified, false);

  Assert.equal(env.unqualified, false);

  Assert.equal(env.lexical, true, "lexical must live in the NSLEO");

  Assert.equal(env.prop, false);

  env = envs[i]; i++;

  Assert.equal(env.type, "WithEnvironmentObject");

  Assert.equal(env.qualified, false);

  Assert.equal(env.unqualified, false);

  Assert.equal(env.lexical, false);

  Assert.equal(env.prop, true, "this property must live in the with env");

  env = envs[i]; i++;

  Assert.equal(env.type, "NonSyntacticVariablesObject");

  Assert.equal(env.qualified, true, "qualified var must live in the NSVO");

  Assert.equal(env.unqualified, true, "unqualified var must live in the NSVO");

  Assert.equal(env.lexical, false);

  Assert.equal(env.prop, false);

  env = envs[i]; i++;

  Assert.equal(env.type, "GlobalLexicalEnvironmentObject");

  Assert.equal(env.qualified, false);

  Assert.equal(env.unqualified, false);

  Assert.equal(env.lexical, false);

  Assert.equal(env.prop, false);

  env = envs[i]; i++;

  Assert.equal(env.type, "*BackstagePass*");

  Assert.equal(env.qualified, false);

  Assert.equal(env.unqualified, false);

  Assert.equal(env.lexical, false);

  Assert.equal(env.prop, false);

  Assert.equal(share.unique_qualified, "undefined", "qualified var must not be shared");

  Assert.equal(share.unique_unqualified, "undefined", "unqualified name must not be shared");

  Assert.equal(share.unique_lexical, "undefined", "lexical must not be shared");

  Assert.equal(share.unique_prop, 40, "this property must be shared");

  await page.close();

});

add_task(async function non_unique_scope() {

  const page = await XPCShellContentUtils.loadContentPage("about:blank", {

    remote: true,

});

  const envsPromise = new Promise(resolve => {

    Services.mm.addMessageListener("non-unique-envs-result", msg => {

      resolve(msg.data);

});

});

  const sharePromise = new Promise(resolve => {

    Services.mm.addMessageListener("non-unique-share-result", msg => {

      resolve(msg.data);

});

});

  const runInUniqueScope = false;

  const runInGlobalScope = !runInUniqueScope;

  Services.mm.loadFrameScript(`data:,

var non_unique_qualified = 10;

non_unique_unqualified = 20;

let non_unique_lexical = 30;

this.non_unique_prop = 40;

const funcs = Cu.getJSTestingFunctions();

const envs = [];

let env = funcs.getInnerMostEnvironmentObject();

while (env) {

  envs.push({

    type: funcs.getEnvironmentObjectType(env) || "*BackstagePass*",

    qualified: !!Object.getOwnPropertyDescriptor(env, "non_unique_qualified"),

    unqualified: !!Object.getOwnPropertyDescriptor(env, "non_unique_unqualified"),

    lexical: !!Object.getOwnPropertyDescriptor(env, "non_unique_lexical"),

    prop: !!Object.getOwnPropertyDescriptor(env, "non_unique_prop"),

});

  env = funcs.getEnclosingEnvironmentObject(env);

sendSyncMessage("non-unique-envs-result", envs);

`, false, runInGlobalScope);

  Services.mm.loadFrameScript(`data:,

sendSyncMessage("non-unique-share-result", {

  non_unique_qualified,

  non_unique_unqualified,

  non_unique_lexical,

  non_unique_prop,

});

`, false, runInGlobalScope);

  const envs = await envsPromise;

  const share = await sharePromise;

  Assert.equal(envs.length, 4);

  let i = 0, env;

  env = envs[i]; i++;

  Assert.equal(env.type, "NonSyntacticLexicalEnvironmentObject");

  Assert.equal(env.qualified, false);

  Assert.equal(env.unqualified, false);

  Assert.equal(env.lexical, true, "lexical must live in the NSLEO");

  Assert.equal(env.prop, false);

  env = envs[i]; i++;

  Assert.equal(env.type, "WithEnvironmentObject");

  Assert.equal(env.qualified, true, "qualified var must live in the with env");

  Assert.equal(env.unqualified, false);

  Assert.equal(env.lexical, false);

  Assert.equal(env.prop, true, "this property must live in the with env");

  env = envs[i]; i++;

  Assert.equal(env.type, "GlobalLexicalEnvironmentObject");

  Assert.equal(env.qualified, false);

  Assert.equal(env.unqualified, false);

  Assert.equal(env.lexical, false);

  Assert.equal(env.prop, false);

  env = envs[i]; i++;

  Assert.equal(env.type, "*BackstagePass*");

  Assert.equal(env.qualified, false);

  Assert.equal(env.unqualified, true, "unqualified name must live in the backstage pass");

  Assert.equal(env.lexical, false);

  Assert.equal(env.prop, false);

  Assert.equal(share.non_unique_qualified, 10, "qualified var must be shared");

  Assert.equal(share.non_unique_unqualified, 20, "unqualified name must be shared");

  Assert.equal(share.non_unique_lexical, 30, "lexical must be shared");

  Assert.equal(share.non_unique_prop, 40, "this property must be shared");

  await page.close();

});