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Test Info:

<!DOCTYPE html>
<meta charset="utf-8">
<title>Bug 1710509</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/gfx/layers/apz/test/mochitest/apz_test_utils.js"></script>
<script src="/tests/gfx/layers/apz/test/mochitest/apz_test_native_event_utils.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css" />
<style>
#container {
width: 100px;
height: 100px;
touch-action: none;
}
</style>
<div id="container"></div>
<script>
/**
* @template {keyof HTMLElementEventMap} K
* @param {HTMLElemnt} target
* @param {K} eventName
* @return {HTMLElementEventMap[K]}
*/
function waitForEvent(target, eventName) {
return new Promise(resolve => {
target.addEventListener(eventName, resolve, { once: true });
});
}
add_task(async function testPenDrag() {
await SpecialPowers.pushPrefEnv({
set: [
["dom.w3c_pointer_events.dispatch_by_pointer_messages", false],
],
});
await SimpleTest.promiseFocus();
const container = document.getElementById("container");
const touchMovePromise = waitForEvent(container, "touchmove");
await promiseNativePointerDrag(container, "pen", 50, 50, -50, -50);
const touchmove = await touchMovePromise;
const [touch] = touchmove.touches;
is(touch.radiusX, 1, ".radiusX");
is(touch.radiusY, 1, ".radiusX");
});
</script>