multi-touch-touchmove.html

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This WPT test may be referenced by the following Test IDs:
- /touch-events/multi-touch-touchmove.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8">

    <title>Simultaneous Touch Moves from multiple pointers</title>

    <link rel=help href="https://github.com/servo/servo/issues/42921">

    <link rel="author" title="Euclid Ye" href="mailto:yezhizhenjiakang@gmail.com">

    <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>

</head>

<body>

    <script>

        promise_test(async () => {

            const seenPointers = new Set();

            document.addEventListener("touchmove", (e) => {

                for (let touch of e.changedTouches) {

                    seenPointers.add(touch.identifier);

});

            await new test_driver.Actions()

                .addPointer("f1", "touch")

                .addPointer("f2", "touch")

                .pointerMove(10, 10, { origin: "viewport", sourceName: "f1" })

                .pointerMove(15, 15, { origin: "viewport", sourceName: "f2" })

                .pointerDown({ sourceName: "f1" })

                .pointerDown({ sourceName: "f2" })

                .pointerMove(30, 30, { origin: "viewport", duration: 0, sourceName: "f1" })

                .pointerMove(40, 40, { origin: "viewport", duration: 0, sourceName: "f2" })

                .pointerUp({ sourceName: "f1" })

                .pointerUp({ sourceName: "f2" })

                .send();

            assert_equals(seenPointers.size, 2, "Should have captured 2 distinct touch identifiers");

        }, "Touchmove events should track multiple pointers");

    </script>

</body>

</html>