test_moz_slider.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>MozSlider Tests</title>

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>

  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>

  <script type="module" src="chrome://global/content/reader/moz-slider.mjs"></script>

</head>

<body>

<p id="display"></p>

<div id="content" style="max-width: fit-content">

  <moz-slider min="0" max="3" value="2" ticks="7" ticklabels='["Narrow", "Wide"]'></moz-slider>

</div>

<pre id="test">

<script class="testbody" type="application/javascript">

  add_task(async function testMozSliderDisplay() {

    const mozSlider = document.querySelector("moz-slider");

    ok(mozSlider, "moz-slider is rendered");

    is(mozSlider.value, 2, "moz-slider should set initial value based on prop");

    const ticks = mozSlider.tickMarks;

    ok(ticks, "moz-slider contains tick marks");

    is(ticks.childElementCount, 7, "should have the correct number of ticks");

});

  add_task(async function testMozSliderValues() {

    const mozSlider = document.querySelector("moz-slider");

    const firstVal = mozSlider.value;

    const sliderChanged = new Promise((resolve) => {

      mozSlider.addEventListener("slider-changed", (event) => resolve(event.detail), { once: true });

});

    mozSlider.sliderTrack.focus();

    synthesizeKey("KEY_ArrowRight");

    await sliderChanged;

    ok(mozSlider.value > firstVal, "moving slider to the right should increase value");

    is(mozSlider.value - firstVal, 0.5, "should increment by correct step size");

    synthesizeKey("KEY_ArrowRight", { repeat: 2 });

    await sliderChanged;

    ok(mozSlider.value == 3, "should not increment beyond max value");

});

</script>

</pre>

</body>

</html>