File: test_memoryPressure.html

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<!DOCTYPE HTML>
<html>
<head>
  <title>Test for ReportingObserver + memory-pressure</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>

<script type="application/javascript">

info("Testing TakeRecords() without memory-pressure");
let o = new ReportingObserver(() => {});
o.observe();

new TestingDeprecatedInterface();
let r = o.takeRecords();
is(r.length, 1, "We have 1 report");

r = o.takeRecords();
is(r.length, 0, "We have 0 reports after a takeRecords()");

info("Testing DeprecatedTestingMethod report");

new TestingDeprecatedInterface();
SpecialPowers.Services.obs.notifyObservers(null, "memory-pressure", "heap-minimize");

r = o.takeRecords();
is(r.length, 0, "We have 0 reports after a memory-pressure");

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