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6576d65005
And change `this.global.Object.create(null)` to `Cu.createObjectIn(this.global)`. The tests pass either way, but `Cu.createObjectIn` is more explicit. MozReview-Commit-ID: LmL6rTru5zZ --HG-- extra : rebase_source : 4cf7b1463bf8b6882b6fd453657eae0ff43ed64d
87 lines
3.7 KiB
JavaScript
87 lines
3.7 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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let {ExtensionUtils: {SchemaAPIManager}} = Cu.import("resource://gre/modules/ExtensionUtils.jsm", {});
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this.unknownvar = "Some module-global var";
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var gUniqueId = 0;
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// SchemaAPIManager's loadScript uses loadSubScript to load a script. This
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// requires a local (resource://) URL. So create such a temporary URL for
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// testing.
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function toLocalURI(code) {
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let dataUrl = `data:charset=utf-8,${encodeURIComponent(code)}`;
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let uniqueResPart = `need-a-local-uri-for-subscript-loading-${++gUniqueId}`;
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Services.io.getProtocolHandler("resource")
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.QueryInterface(Ci.nsIResProtocolHandler)
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.setSubstitution(uniqueResPart, Services.io.newURI(dataUrl, null, null));
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return `resource://${uniqueResPart}`;
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}
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add_task(function* test_global_isolation() {
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let manA = new SchemaAPIManager("procA");
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let manB = new SchemaAPIManager("procB");
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// The "global" variable should be persistent and shared.
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manA.loadScript(toLocalURI`global.globalVar = 1;`);
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do_check_eq(manA.global.globalVar, 1);
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do_check_eq(manA.global.unknownvar, undefined);
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manA.loadScript(toLocalURI`global.canSeeGlobal = global.globalVar;`);
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do_check_eq(manA.global.canSeeGlobal, 1);
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// Each loadScript call should have their own scope, and global is shared.
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manA.loadScript(toLocalURI`this.aVar = 1; global.thisScopeVar = aVar`);
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do_check_eq(manA.global.aVar, undefined);
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do_check_eq(manA.global.thisScopeVar, 1);
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manA.loadScript(toLocalURI`global.differentScopeVar = this.aVar;`);
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do_check_eq(manA.global.differentScopeVar, undefined);
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manA.loadScript(toLocalURI`global.cantSeeOtherScope = typeof aVar;`);
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do_check_eq(manA.global.cantSeeOtherScope, "undefined");
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manB.loadScript(toLocalURI`global.tryReadOtherGlobal = global.tryagain;`);
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do_check_eq(manA.global.tryReadOtherGlobal, undefined);
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// Cu.import without second argument exports to the caller's global. Let's
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// verify that it does not leak to the SchemaAPIManager's global.
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do_check_eq(typeof ExtensionUtils, "undefined"); // Sanity check #1.
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manA.loadScript(toLocalURI`global.hasExtUtils = typeof ExtensionUtils;`);
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do_check_eq(manA.global.hasExtUtils, "undefined"); // Sanity check #2
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Cu.import("resource://gre/modules/ExtensionUtils.jsm");
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do_check_eq(typeof ExtensionUtils, "object"); // Sanity check #3.
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manA.loadScript(toLocalURI`global.hasExtUtils = typeof ExtensionUtils;`);
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do_check_eq(manA.global.hasExtUtils, "undefined");
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manB.loadScript(toLocalURI`global.hasExtUtils = typeof ExtensionUtils;`);
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do_check_eq(manB.global.hasExtUtils, "undefined");
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// Confirm that Cu.import does not leak between SchemaAPIManager globals.
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manA.loadScript(toLocalURI`
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Cu.import("resource://gre/modules/ExtensionUtils.jsm");
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global.hasExtUtils = typeof ExtensionUtils;
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`);
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do_check_eq(manA.global.hasExtUtils, "object"); // Sanity check.
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manB.loadScript(toLocalURI`global.hasExtUtils = typeof ExtensionUtils;`);
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do_check_eq(manB.global.hasExtUtils, "undefined");
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// Prototype modifications should be isolated.
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manA.loadScript(toLocalURI`
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Object.prototype.modifiedByA = "Prrft";
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global.fromA = {};
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`);
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manA.loadScript(toLocalURI`
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global.fromAagain = {};
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`);
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manB.loadScript(toLocalURI`
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global.fromB = {};
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`);
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do_check_eq(manA.global.modifiedByA, "Prrft");
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do_check_eq(manA.global.fromA.modifiedByA, "Prrft");
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do_check_eq(manA.global.fromAagain.modifiedByA, "Prrft");
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do_check_eq(manB.global.modifiedByA, undefined);
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do_check_eq(manB.global.fromB.modifiedByA, undefined);
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});
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