size-containment-001.tentative.html

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This test has a WPT meta file that expects 42 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /mathml/relations/css-styling/size-containment-001.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<title>MathML and size containment</title>

<link rel="help" href="https://w3c.github.io/mathml-core/#layout-algorithms">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/mathml/support/feature-detection.js"></script>

<script src="/mathml/support/mathml-fragments.js"></script>

<style>

  /* Revert style specified in the UA style sheet that changes box size. */

  merror { border: 0; }

  mfrac { padding: 0; }

</style>

<script>

  setup({ explicit_done: true });

  window.addEventListener("load", runTests);

  function runTests() {

    for (tag in MathMLFragments) {

        if (!FragmentHelper.isValidChildOfMrow(tag) ||

            FragmentHelper.isEmpty(tag))

            continue;

        // TODO(https://github.com/w3c/mathml-core/issues/199): Check/decide how

        // size containment behave for these cases:

        // - table layout.

        // - radical layout.

        // - contain-intrinsic-block-size.

        // - operators width special drawing (stretchy/largop).

        if (tag == "mroot" || tag == "msqrt" || tag == "mtable") {

            continue;

        document.body.insertAdjacentHTML("beforeend", `<div style="position: absolute;">\

<div style="display: inline-block;"><math>${MathMLFragments[tag]}</math></div>\

</div>`);

        let div = document.body.lastElementChild;

        let elementContainer = div.firstElementChild;

        let element = FragmentHelper.element(elementContainer);

        FragmentHelper.forceNonEmptyDescendants(element);

        const style = `contain: size; contain-intrinsic-inline-size: 111px;`;

        element.setAttribute("style", style)

        if (tag === "mo") {

            element.setAttribute("lspace", "0");

            element.setAttribute("rspace", "0");

        const elementContainerWidth = elementContainer.getBoundingClientRect().width;

        const elementBox = element.getBoundingClientRect();

        test(function() {

            assert_true(MathMLFeatureDetection[`has_${tag}`](), `${tag} is supported`);

            assert_equals(elementContainerWidth, 111);

        }, `intrinsic size of ${tag} with ${style}`);

        test(function() {

            assert_true(MathMLFeatureDetection[`has_${tag}`](), `${tag} is supported`);

            assert_equals(elementBox.width, 111);

        }, `inline-size of ${tag} with ${style}`);

        div.style = "display: none;"; // Hide the div after measurement.

    done();

</script>

</head>

<body>

  <div id="log"></div>

</body>

</html>