range-snap-to-tick-marks-03.html

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This WPT test may be referenced by the following Test IDs:
- /html/rendering/non-replaced-elements/form-controls/range-snap-to-tick-marks-03.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<meta name=viewport content=width=device-width>

<title>Snap to a vertical slider's tick marks by clicking near them</title>

<link rel=help href="https://html.spec.whatwg.org/multipage/rendering.html#the-input-element-as-a-range-control">

<link rel=help href="https://bugzilla.mozilla.org/show_bug.cgi?id=1803118">

<link rel=author href="mailto:zach@zrhoffman.net" title="Zach Hoffman">

<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>

<style>

  input[type=range] {

    writing-mode: vertical-lr;

    direction: rtl; /* so the range progresses upwards, not downwards */

</style>

<input type=range list=tickmarks min=-5 max=35>

<datalist id=tickmarks>

  <option value=0></option>

  <option value=3></option>

</datalist>

<script>

  const range = document.querySelector("input[type=range]");

  promise_test(async function snapToVerticalTickMarks() {

    const assertions = [[-3, "-3"], [-2, "0"], [1, "0"], [2, "3"], [5, "3"], [6, "6"]];

    const rect = range.getBoundingClientRect();

    const padding = 10;

    const bottom = rect.bottom - padding;

    const height = rect.height - 2 * padding;

    const actions = new test_driver.Actions();

    const min = parseInt(range.min);

    const max = parseInt(range.max);

    for (const assertion of assertions) {

      const moveTo = (bottom - height * (assertion[0] - min) / (max - min)) | 0;

      const expected = assertion[1];

      await actions

          .pointerMove(rect.left, moveTo)

          .pointerDown()

          .pointerUp()

          .send();

      assert_equals(range.value, expected);

});

</script>