mozilla-central/devtools/client/responsive/test/browser/browser_scroll.js (file symbol)

Source code

Revision control

Copy as Markdown

Other Tools

Test Info: Warnings

/* Any copyright is dedicated to the Public Domain.
"use strict";
/**
* This test is checking that keyboard scrolling of content in RDM
* behaves correctly, both with and without touch simulation enabled.
*/
const PAINT_LISTENER_JS_URL =
URL_ROOT + "../../../../../../tests/SimpleTest/paint_listener.js";
const APZ_TEST_UTILS_JS_URL =
URL_ROOT + "../../../../../gfx/layers/apz/test/mochitest/apz_test_utils.js";
const TEST_URL =
"data:text/html;charset=utf-8," +
'<head><meta name="viewport" content="width=100, height=100"/>' +
'<script src="' +
PAINT_LISTENER_JS_URL +
'"></script>' +
'<script src="' +
APZ_TEST_UTILS_JS_URL +
'"></script>' +
"</head>" +
'<div style="background:blue; width:200px; height:200px"></div>';
addRDMTask(TEST_URL, async function ({ ui, manager }) {
await setViewportSize(ui, manager, 50, 50);
const browser = ui.getViewportBrowser();
for (const mv in [true, false]) {
await ui.updateTouchSimulation(mv);
info("Setting focus on the browser.");
browser.focus();
await SpecialPowers.spawn(browser, [], async () => {
// First of all, cancel any async scroll animation if there is. If there's
// an on-going async scroll animation triggered by synthesizeKey, below
// scrollTo call scrolls to a position nearby (0, 0) so that this test
// won't work as expected.
await content.wrappedJSObject.cancelScrollAnimation(
content.document.scrollingElement,
content
);
content.scrollTo(0, 0);
});
info("Testing scroll behavior with touch simulation " + mv + ".");
await testScrollingOfContent(ui);
}
});
async function testScrollingOfContent(ui) {
let scroll;
info("Checking initial scroll conditions.");
const viewportScroll = await getViewportScroll(ui);
is(viewportScroll.x, 0, "Content should load with scrollX 0.");
is(viewportScroll.y, 0, "Content should load with scrollY 0.");
/**
* Here we're going to send off some arrow key events to trigger scrolling.
* What we would like to be able to do is to await the scroll event and then
* check the scroll position to confirm the amount of scrolling that has
* happened. Unfortunately, APZ makes the scrolling happen asynchronously on
* the compositor thread, and it's very difficult to await the end state of
* the APZ animation -- see the tests in /gfx/layers/apz/test/mochitest for
* an example. For our purposes, it's sufficient to test that the scroll
* event is fired at all, and not worry about the amount of scrolling that
* has occurred at the time of the event. If the key events don't trigger
* scrolling, then no event will be fired and the test will time out.
*/
scroll = waitForViewportScroll(ui);
info("Synthesizing an arrow key down.");
EventUtils.synthesizeKey("KEY_ArrowDown");
await scroll;
info("Scroll event was fired after arrow key down.");
scroll = waitForViewportScroll(ui);
info("Synthesizing an arrow key right.");
EventUtils.synthesizeKey("KEY_ArrowRight");
await scroll;
info("Scroll event was fired after arrow key right.");
}