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<!DOCTYPE HTML>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="scroll_support.js"></script>
<style>
#spacer {
height: 100vh;
width: 100px;
position: relative;
}
#targetDiv {
width: 200px;
height: 200px;
overflow: scroll;
}
#innerDiv {
width: 400px;
height: 400px;
}
</style>
<body style="margin:0" onload=runTest()>
<div id="targetDiv">
<!-- This test uses button elements as a consistent mechanism for
ensuring that focus is on the correct scrolling element when
scrolling via keys -->
<button id="targetButton">target</button>
<div id="innerDiv"></div>
</div>
<button id="docButton">doc</button>
<div id="spacer"></div>
</body>
<script>
var target_div = document.getElementById('targetDiv');
async function resetScrollers(test) {
await waitForScrollReset(test, target_div);
await waitForScrollReset(test, document.scrollingElement);
}
function getBoundingClientRect(element) {
if (element == document) {
return document.documentElement.getBoundingClientRect();
}
return element.getBoundingClientRect();
}
async function upwardScroll(scrolling_element, button_element, scroll_type) {
if (scroll_type == "wheel") {
let x = 0;
let y = 0;
let delta_x = 0;
let delta_y = -50;
let actions = new test_driver.Actions()
.scroll(x, y, delta_x, delta_y, {origin: scrolling_element});
await actions.send();
} else if (scroll_type == "keys") {
const num_keydowns = 5;
const arrowUp = '\uE013';
for (let i = 0; i < num_keydowns; i++) {
await test_driver.send_keys(button_element, arrowUp);
}
}
}
async function testScrollendNotFiredOnNoScroll(test, scrolling_element,
listening_element,
button_element, scroll_type) {
await resetScrollers(test);
await waitForCompositorCommit();
assert_greater_than(scrolling_element.scrollHeight,
scrolling_element.clientHeight);
assert_equals(scrolling_element.scrollTop, 0);
let scrollend_promise = waitForScrollendEvent(test, listening_element).then(
(/*resolve*/) => {
assert_true(false, "no scroll, so no scrollend expected");
},
(/*reject*/) => { /* Did not see scrollend, which is okay. */ }
);
await upwardScroll(scrolling_element, button_element, scroll_type);
await scrollend_promise;
}
function runTest() {
promise_test(async (t) => {
await testScrollendNotFiredOnNoScroll(t, target_div, target_div,
targetButton, "wheel");
}, "No scroll via wheel on div shouldn't fire scrollend.");
promise_test(async (t) => {
await testScrollendNotFiredOnNoScroll(t, target_div, target_div,
targetButton, "keys");
}, "No scroll via keys on div shouldn't fire scrollend.");
promise_test(async (t) => {
await testScrollendNotFiredOnNoScroll(t, document.scrollingElement,
document, docButton, "wheel");
}, "No scroll via wheel on document shouldn't fire scrollend.");
promise_test(async (t) => {
await testScrollendNotFiredOnNoScroll(t, document.scrollingElement,
document, docButton, "keys");
}, "No scroll via keys on document shouldn't fire scrollend.")
}
</script>
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