wpt / svg / types / scripted / SVGLength-convertToSpecifiedUnits-readonly.html

Status: FAIL | Duration: 57ms | Subtests: 0/5 | Open test on wpt.live | wpt.fyi

TestTest SourceSubtests (0/5)

Data from commit:
96ff533 Remove hidden nodes from the acccessibility tree (#823) (2026-09-07)

SubtestStatusMessage
SVGLength, convertToSpecifiedUnits on read-only animVal, animVal throws NoModificationAllowedErrorFAILcannot convert 'null' or 'undefined' to object
SVGLength, convertToSpecifiedUnits on read-only animVal, animVal unchanged after failed conversionFAILcannot convert 'null' or 'undefined' to object
SVGLength, convertToSpecifiedUnits on read-only animVal, animVal throws for percentageFAILcannot convert 'null' or 'undefined' to object
SVGLength, convertToSpecifiedUnits on read-only animVal, animVal throws for emsFAILcannot convert 'null' or 'undefined' to object
SVGLength, convertToSpecifiedUnits on read-only animVal, baseVal still accepts conversionFAILcannot convert 'null' or 'undefined' to object

/svg/types/scripted/SVGLength-convertToSpecifiedUnits-readonly.html

<!DOCTYPE HTML>
<title>SVGLength, convertToSpecifiedUnits on read-only animVal</title>
<link rel="help" href="https://w3c.github.io/svgwg/svg2-draft/single-page.html#types-__svg__SVGLength__convertToSpecifiedUnits">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<p></p>
<script>
setup(function() {
  let svgElement = document.createElementNS("http://www.w3.org/2000/svg", "svg");
  svgElement.setAttribute("width", "200");
  svgElement.setAttribute("height", "100");
  let rectElement = document.createElementNS("http://www.w3.org/2000/svg", "rect");
  rectElement.setAttribute("x", "10");
  svgElement.appendChild(rectElement);
  document.querySelector("p").appendChild(svgElement);

  window.rectElement = rectElement;
});

// Step 1 of the spec algorithm: "If the SVGLength object is read only,
// then throw a NoModificationAllowedError."

test(function() {
  let animVal = rectElement.x.animVal;
  assert_throws_dom("NoModificationAllowedError", function() {
    animVal.convertToSpecifiedUnits(SVGLength.SVG_LENGTHTYPE_CM);
  });
}, document.title + ", animVal throws NoModificationAllowedError");

test(function() {
  let animVal = rectElement.x.animVal;
  assert_throws_dom("NoModificationAllowedError", function() {
    animVal.convertToSpecifiedUnits(SVGLength.SVG_LENGTHTYPE_NUMBER);
  });
  // Verify animVal is unchanged after failed conversion.
  assert_equals(animVal.value, 10);
  assert_equals(animVal.unitType, SVGLength.SVG_LENGTHTYPE_NUMBER);
}, document.title + ", animVal unchanged after failed conversion");

test(function() {
  let animVal = rectElement.x.animVal;
  assert_throws_dom("NoModificationAllowedError", function() {
    animVal.convertToSpecifiedUnits(SVGLength.SVG_LENGTHTYPE_PERCENTAGE);
  });
}, document.title + ", animVal throws for percentage");

test(function() {
  let animVal = rectElement.x.animVal;
  assert_throws_dom("NoModificationAllowedError", function() {
    animVal.convertToSpecifiedUnits(SVGLength.SVG_LENGTHTYPE_EMS);
  });
}, document.title + ", animVal throws for ems");

test(function() {
  // baseVal should still work fine.
  let baseVal = rectElement.x.baseVal;
  baseVal.valueAsString = "10";
  baseVal.convertToSpecifiedUnits(SVGLength.SVG_LENGTHTYPE_CM);
  assert_equals(baseVal.unitType, SVGLength.SVG_LENGTHTYPE_CM);
}, document.title + ", baseVal still accepts conversion");
</script>