File: test_has_rbab.html

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<!DOCTYPE HTML>
<html>
<head>
  <meta charset='UTF-8'>
  <title>Fail without robust_buffer_access_behavior</title>
  <script src='/tests/SimpleTest/SimpleTest.js'></script>
  <link rel='stylesheet' href='/tests/SimpleTest/test.css'>
</head>
<body>
<script>

function AssertRBAB() {
  const c = document.createElement('canvas');
  const g = c.getContext('webgl');
  const e = g.getExtension('MOZ_debug');
  ok(e, 'Should have MOZ_debug.');

  const does_index_validation = e.getParameter(e.DOES_INDEX_VALIDATION);
  const err = g.getError();
  ok(!err, 'Error should be 0, was 0x' + err.toString(16));
  ok(!does_index_validation,
     "Should have RBAB. Mark this test as failing on platforms that can't support it.");

  SimpleTest.finish();
}

// -

SimpleTest.waitForExplicitFinish();

const prefPairList = [
  ['webgl.force-enabled', true],
  ['webgl.enable-privileged-extensions', true],
];
const prefEnv = {'set': prefPairList};
SpecialPowers.pushPrefEnv(prefEnv, AssertRBAB);

</script>
</body>
</html>