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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/. */
/**
* This modules handles creating and provisioning Sandboxes for
* executing cross-process code from SpecialPowers. This allows all such
* sandboxes to have a similar environment, and in particular allows
* them to run test assertions in the target process and propagate
* results back to the caller.
*/
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
Assert: "resource://testing-common/Assert.sys.mjs",
});
// Note: When updating the set of globals exposed to sandboxes by
// default, please also update the ESLint plugin rule defined in
// import-content-task-globals.js.
const SANDBOX_GLOBALS = [
"Blob",
"ChromeUtils",
"FileReader",
"TextDecoder",
"TextEncoder",
"URL",
];
const EXTRA_IMPORTS = {
EventUtils: "resource://specialpowers/SpecialPowersEventUtils.jsm",
};
let expectFail = false;
function expectingFail(fn) {
try {
expectFail = true;
fn();
} finally {
expectFail = false;
}
}
export class SpecialPowersSandbox {
constructor(name, reportCallback, opts = {}) {
this.name = name;
this.reportCallback = reportCallback;
this._Assert = null;
this.sandbox = Cu.Sandbox(
Cu.getGlobalForObject({}),
Object.assign(
{ wantGlobalProperties: SANDBOX_GLOBALS },
opts.sandboxOptions
)
);
for (let prop of ["assert", "Assert"]) {
Object.defineProperty(this.sandbox, prop, {
get: () => {
return this.Assert;
},
enumerable: true,
configurable: true,
});
}
let imports = {
...EXTRA_IMPORTS,
...opts.imports,
};
for (let [symbol, url] of Object.entries(imports)) {
ChromeUtils.defineModuleGetter(this.sandbox, symbol, url);
}
// Note: When updating the set of globals exposed to sandboxes by
// default, please also update the ESLint plugin rule defined in
// import-content-task-globals.js.
Object.assign(this.sandbox, {
BrowsingContext,
InspectorUtils,
ok: (...args) => {
this.Assert.ok(...args);
},
is: (...args) => {
this.Assert.equal(...args);
},
isnot: (...args) => {
this.Assert.notEqual(...args);
},
todo: (...args) => {
expectingFail(() => this.Assert.ok(...args));
},
todo_is: (...args) => {
expectingFail(() => this.Assert.equal(...args));
},
info: info => {
this.reportCallback({ info });
},
});
}
get Assert() {
if (!this._Assert) {
this._Assert = new lazy.Assert((err, message, stack) => {
this.report(err, message, stack);
});
}
return this._Assert;
}
report(err, name, stack) {
let diag;
if (err) {
diag =
`got ${uneval(err.actual)}, expected ${uneval(err.expected)} ` +
`(operator ${err.operator})`;
}
this.reportCallback({
name,
diag,
passed: !err,
stack: stack && stack.formattedStack,
expectFail,
});
}
execute(task, args, caller) {
let func = Cu.evalInSandbox(
`(${task})`,
this.sandbox,
undefined,
caller.filename,
caller.lineNumber
);
return func(...args);
}
}
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