<!DOCTYPE HTML> <html> <head> <title>Test for SpecialPowers.spawn</title> <script src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> </head> <body> <iframe id="iframe"></iframe> <span id="hello">World.</span> <script> /* globals SpecialPowers, content */ add_task(async function() { let frame = document.getElementById("iframe"); frame.src = "https://example.com/tests/testing/mochitest/tests/Harness_sanity/file_spawn.html"; await new Promise(resolve => { frame.addEventListener("load", resolve, {once: true}); }); let result = await SpecialPowers.spawn(frame, ["#span"], selector => { let elem = content.document.querySelector(selector); return elem.textContent; }); is(result, "Hello there.", "Got correct element text from frame"); /* eslint-disable no-shadow */ result = await SpecialPowers.spawn(frame, ["#hello"], selector => { return SpecialPowers.spawn(content.parent, [selector], selector => { let elem = content.document.querySelector(selector); return elem.textContent; }); }); is(result, "World.", "Got correct element text from frame's window.parent"); result = await SpecialPowers.spawn(frame.contentWindow, ["#span"], selector => { let elem = content.document.querySelector(selector); return elem.textContent; }); is(result, "Hello there.", "Got correct element text from window proxy"); result = await SpecialPowers.spawn(SpecialPowers.getPrivilegedProps(frame, "browsingContext"), ["#span"], selector => { let elem = content.document.querySelector(selector); return elem.textContent; }); is(result, "Hello there.", "Got correct element text from browsing context"); let line = 58; // Keep this in sync with the line number where the callback function starts. let callback = () => { let e = new Error("Hello."); return { filename: e.fileName, lineNumber: e.lineNumber }; }; let loc = await SpecialPowers.spawn(frame, [], callback); is(loc.filename, location.href, "Error should have correct script filename"); is(loc.lineNumber, line + 2, "Error should have correct script line number"); }); </script> </body> </html>