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Test Info:

<!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>
/* eslint-disable prettier/prettier */
/* globals SpecialPowers, content */
add_task(async function() {
let frame = document.getElementById("iframe");
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 = 59; // 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>