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<!doctype html>
<meta charset=utf-8>
<title>mousemove event: preventDefault()</title>
<link rel="author" title="Mirko Brodesser" href="mailto:mbrodesser@mozilla.com">
<link rel="help" href="https://github.com/w3c/uievents/issues/278">
<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=resources/utils.js></script>
<body>
<div id="a">div a</div>
<div id="b">div b</div>
<div id="c" draggable="true">div c</div>
</body>
<script>
'use strict';
let event_log = [];
function logEvents(e) {
event_log.push(e.type);
}
// Deliberately avoiding mouseup here because the last selectionchange
// may be fired before or after the mouseup.
["mousedown", "mousemove", "selectionchange", "dragstart"].forEach(ename => {
document.addEventListener(ename, logEvents);
});
document.addEventListener("mousemove", e => e.preventDefault());
promise_test(async () => {
event_log = [];
const a = document.getElementById("a");
const b = document.getElementById("b");
let mouseup_promise = getEvent("mouseup", document);
await new test_driver.Actions()
.pointerMove(0, 0, {origin: a})
.pointerDown()
.addTick()
.addTick()
.pointerMove(0, 0, {origin: b})
.addTick()
.addTick()
.pointerUp()
.send();
await mouseup_promise;
const expected_events = ["mousemove", "mousedown", "selectionchange",
"mousemove", "selectionchange"];
assert_equals(event_log.toString(), expected_events.toString(),
"received events");
}, "selectionchange event firing when mousemove event is prevented");
promise_test(async () => {
event_log = [];
const b = document.getElementById("b");
const c = document.getElementById("c");
let dragstart_promise = getEvent("dragstart", document);
// A mouseup event is not expected. This avoids timing out when the
// dragstart event is missing.
let mouseup_promise = getEvent("mouseup", document);
await new test_driver.Actions()
.pointerMove(0, 0, {origin: c})
.pointerDown()
.addTick()
.addTick()
.pointerMove(0, 0, {origin: b})
.addTick()
.addTick()
.pointerUp()
.send();
await Promise.race([dragstart_promise, mouseup_promise]);
const expected_events = ["mousemove", "mousedown", "mousemove", "dragstart"];
assert_equals(event_log.toString(), expected_events.toString(),
"received events");
}, "dragstart event firing when mousemove event is prevented");
</script>
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