currentSrc-blob-cache.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/the-img-element/currentSrc-blob-cache.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8">

<title>currentSrc is right even if underlying image is a shared blob</title>

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

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

<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1625786">

<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">

<link rel="author" title="Mozilla" href="https://mozilla.org">

<img id="first">

<img id="second">

<script>

promise_test(async t => {

  let canvas = document.createElement("canvas");

  canvas.width = 100;

  canvas.height = 100;

  let ctx = canvas.getContext("2d");

  ctx.fillStyle = "green";

  ctx.rect(0, 0, 100, 100);

  ctx.fill();

  let blob = await new Promise(resolve => canvas.toBlob(resolve));

  let first = document.querySelector("#first");

  let second = document.querySelector("#second");

  let firstLoad = new Promise(resolve => {

    first.addEventListener("load", resolve, { once: true });

});

  let secondLoad = new Promise(resolve => {

    second.addEventListener("load", resolve, { once: true });

});

  let uri1 = URL.createObjectURL(blob);

  let uri2 = URL.createObjectURL(blob);

  first.src = uri1;

  second.src = uri2;

  await firstLoad;

  await secondLoad;

  assert_equals(first.src, first.currentSrc);

  assert_equals(second.src, second.currentSrc);

});

</script>