test_font_face_gc.html

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<!DOCTYPE html>

<meta charset=utf-8>

<title>Test for bug 1897589</title>

<script src=/tests/SimpleTest/SimpleTest.js></script>

<link rel=stylesheet type=text/css href=/tests/SimpleTest/test.css>

<script>

function forceGC() {

  SpecialPowers.gc();

  SpecialPowers.forceShrinkingGC();

  SpecialPowers.forceCC();

  SpecialPowers.gc();

  SpecialPowers.forceShrinkingGC();

  SpecialPowers.forceCC();

add_task(async function() {

  let face = new FontFace('foo', `url("slow_load.sjs")`);

  let p = face.load();

  // Comment out the following line to fix it.

  face = null;

  forceGC();

  try {

    await p;

    ok(false, "Resolved text/plain request?");

  } catch (ex) {

    ok(true, "Expect rejection due to wrong content-type");

})

</script>