mousemove-action-interpolation.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /uievents/mouse/mousemove-action-interpolation.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Mousemove should transition smoothly over specified duration</title>

<link rel=help href="https://github.com/servo/servo/issues/42950">

<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-vendor.js"></script>

<script src="/resources/testdriver-actions.js"></script>

<div id="dot" style="position:fixed; width:10px; height:10px; background:red; border-radius:50%; pointer-events:none;">

</div>

<script>

    promise_test(async t => {

        const dot = document.getElementById('dot');

        const mouse_move_coordinates = [];

        const handler = (event) => {

            mouse_move_coordinates.push({ x: event.clientX, y: event.clientY });

            dot.style.transform = `translate(${event.clientX}px, ${event.clientY}px)`;

};

        document.addEventListener('mousemove', handler);

        t.add_cleanup(() => {

            document.removeEventListener('mousemove', handler);

            dot.remove();

});

        await new test_driver.Actions()

            .pointerMove(10, 10)

            .pointerMove(250, 250, { duration: 500 })

            .send();

        assert_greater_than(mouse_move_coordinates.length, 10,

            "Should have more than 10 mousemove events over 500ms");

        const uniqueX = new Set(mouse_move_coordinates.map(coordinates => coordinates.x));

        const uniqueY = new Set(mouse_move_coordinates.map(coordinates => coordinates.y));

        assert_equals(uniqueX.size, mouse_move_coordinates.length, "Every X-coordinate must be unique");

        assert_equals(uniqueY.size, mouse_move_coordinates.length, "Every Y-coordinate must be unique");

    }, "Mousemove should transition smoothly over specified duration");

</script>