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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Bug 1692277</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;
+ overflow: scroll;
+ }
+
+ #child {
+ width: 200px;
+ height: 200px;
+ }
+</style>
+
+<div id="container">
+ <div id="child"></div>
+</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", true],
+ ["dom.w3c_pointer_events.scroll_by_pen.enabled", true],
+ ],
+ });
+
+ await SimpleTest.promiseFocus();
+ const container = document.getElementById("container");
+ const scrollPromise = waitForEvent(container, "scroll");
+ const pointerPromise = waitForEvent(container, "pointerdown");
+ await promiseNativePointerDrag(container, "pen", 50, 50, -50, -50, 0, {
+ pressure: 0.25,
+ tiltX: 40,
+ tiltY: 50,
+ twist: 80,
+ });
+ await scrollPromise;
+
+ const pointerdown = await pointerPromise;
+ is(pointerdown.pointerType, "pen");
+ is(pointerdown.type, "pointerdown", ".type");
+ is(pointerdown.button, 0, ".button");
+ is(pointerdown.buttons, 1, ".buttons");
+ is(pointerdown.layerX, 50, ".layerX");
+ is(pointerdown.layerY, 50, ".layerY");
+ is(pointerdown.pressure, 0.25, ".pressure");
+ is(pointerdown.tiltX, 40, ".tiltX");
+ is(pointerdown.tiltY, 50, ".tiltY");
+ is(pointerdown.twist, 80, ".twist");
+ });
+</script>