SVGSVGElement-currentTranslate-SameObject.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /svg/struct/SVGSVGElement-currentTranslate-SameObject.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>SVGSVGElement.currentTranslate is [SameObject]</title>

<link rel="help" href="https://w3c.github.io/svgwg/svg2-draft/struct.html#__svg__SVGSVGElement__currentTranslate">

<link rel="help" href="https://webidl.spec.whatwg.org/#SameObject">

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

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

<svg id="svg" xmlns="http://www.w3.org/2000/svg" width="100" height="100"></svg>

<script>

const svg = document.getElementById("svg");

test(() => {

  assert_equals(svg.currentTranslate, svg.currentTranslate);

}, "currentTranslate returns the same object on consecutive reads ([SameObject])");

test(() => {

  const p = svg.currentTranslate;

  p.x = 10;

  assert_equals(svg.currentTranslate, p, "same object after mutating x");

}, "currentTranslate identity is stable across value changes");

test(() => {

  svg.currentTranslate.x = 42;

  assert_equals(svg.currentTranslate.x, 42);

}, "mutations through currentTranslate are observable on re-read");

test(() => {

  svg.currentTranslate.x = 7;

  svg.currentTranslate.y = 9;

  const replacement = svg.createSVGPoint();

  replacement.x = 100;

  replacement.y = 200;

  // Assignment to a readonly attribute is ignored (silently in non-strict mode).

  // Asserted on the value, not object identity, so this isolates readonly from

  // [SameObject]: an engine that fails identity still passes this if it honors readonly.

  try { svg.currentTranslate = replacement; } catch (e) {}

  assert_equals(svg.currentTranslate.x, 7, "x value unchanged");

  assert_equals(svg.currentTranslate.y, 9, "y value unchanged");

}, "currentTranslate is readonly; assignment does not change the value");

</script>