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Test Info:
/* Any copyright is dedicated to the Public Domain.
"use strict";
/**
* Check that the browser element can be moved with moveBefore without breaking
* the behavior of the <browser> or <tab>.
*/
add_task(async function test_moveBefore_api() {
await BrowserTestUtils.withNewTab("https://example.com/", async browser => {
await SpecialPowers.spawn(browser, [], async () => {
// Modify from original, so that if the content were to reload
// unexpectedly, that we would detect it.
content.document.body.textContent = "Preserve me pls";
});
browser.parentNode.moveBefore(browser, browser.nextSibling);
let actual = await SpecialPowers.spawn(browser, [], async () => {
return content.document.body.textContent;
});
is(actual, "Preserve me pls", "<browser> content should be preserved");
});
});