dom/tests/mochitest/fetch/file_fetch_observer.html


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<script>
function ok(a, msg) {
  parent.postMessage({ type: "check", status: !!a, message: msg }, "*");
}

function is(a, b, msg) {
  ok(a === b, msg);
}

function testObserver() {
  ok("FetchObserver" in self, "We have a FetchObserver prototype");

  fetch('data:,foo', { observe: o => {
  }});
}

var steps = [
  testObserver,
];

function next() {
  if (!steps.length) {
    parent.postMessage({ type: "finish" }, "*");
    return;
  }

  var step = steps.shift();
  step();
}

next();

</script>