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Test Info:
- Manifest: dom/html/test/browser.toml
"use strict";
// Form submissions triggered by the Javascript 'submit' event listener are
// deferred until the event listener finishes. However, changes to specific
// attributes ("action" and "target" attributes) need to cause an immediate
// flush of any pending submission to prevent the form submission from using the
// wrong action or target. This test ensures that such flushes happen properly.
const kTestPage =
// This is the page pointed to by the form action in the test HTML page.
const kPostActionPage =
const kFormId = "test_form";
const kFrameId = "test_frame";
const kSubmitButtonId = "submit_button";
// Take in a variety of actions (in the form of setting and unsetting form
// attributes). Then submit the form in the submit event listener to cause a
// deferred form submission. Then perform the test actions and ensure that the
// form used the correct attribute values rather than the changed ones.
async function runTest(aTestActions) {
let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, kTestPage);
registerCleanupFunction(() => BrowserTestUtils.removeTab(tab));
/* eslint-disable no-shadow */
let frame_url = await SpecialPowers.spawn(
gBrowser.selectedBrowser,
[{ kFormId, kFrameId, kSubmitButtonId, aTestActions }],
async function ({ kFormId, kFrameId, kSubmitButtonId, aTestActions }) {
let form = content.document.getElementById(kFormId);
form.addEventListener(
"submit",
event => {
// Need to trigger the deferred submission by submitting in the submit
// event handler. To prevent the form from being submitted twice, the
// <form> tag contains the attribute |onsubmit="return false;"| to cancel
// the original submission.
form.submit();
if (aTestActions.setattr) {
for (let { attr, value } of aTestActions.setattr) {
form.setAttribute(attr, value);
}
}
if (aTestActions.unsetattr) {
for (let attr of aTestActions.unsetattr) {
form.removeAttribute(attr);
}
}
},
{ capture: true, once: true }
);
// Trigger the above event listener
content.document.getElementById(kSubmitButtonId).click();
// Test that the form was submitted to the correct target (the frame) with
// the correct action (kPostActionPage).
let frame = content.document.getElementById(kFrameId);
await new Promise(resolve => {
frame.addEventListener("load", resolve, { once: true });
});
return frame.contentWindow.location.href;
}
);
/* eslint-enable no-shadow */
is(
frame_url,
kPostActionPage,
"Form should have submitted with correct target and action"
);
}
add_task(async function () {
info("Changing action should flush pending submissions");
await runTest({ setattr: [{ attr: "action", value: "about:blank" }] });
});
add_task(async function () {
info("Changing target should flush pending submissions");
await runTest({ setattr: [{ attr: "target", value: "_blank" }] });
});
add_task(async function () {
info("Unsetting action should flush pending submissions");
await runTest({ unsetattr: ["action"] });
});
// On failure, this test will time out rather than failing an assert. When the
// target attribute is not set, the form will submit the active page, navigating
// it away and preventing the wait for iframe load from ever finishing.
add_task(async function () {
info("Unsetting target should flush pending submissions");
await runTest({ unsetattr: ["target"] });
});