test_performance_paint_observer_helper.html

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<!--

  Any copyright is dedicated to the Public Domain.

  http://creativecommons.org/publicdomain/zero/1.0/

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<!DOCTYPE html>

<html>

  <body>

  </body>

  <script>

    var promise = new Promise(resolve => {

      var observer = new PerformanceObserver(list => resolve(list));

      observer.observe({entryTypes: ["paint"]});

});

    promise.then(list => {

      var perfEntries = list.getEntries();

      opener.is(list.getEntries().length, 1);

      opener.isDeeply(list.getEntries(),

                performance.getEntriesByType("paint"),

                "Observed 'paint' entries should equal to entries obtained by getEntriesByType.");

      opener.isDeeply(list.getEntries({name: "paint"}),

                performance.getEntriesByName("paint"),

                "getEntries with name filter should return correct results.");

      opener.isDeeply(list.getEntries({entryType: "paint"}),

                performance.getEntriesByType("paint"),

                "getEntries with entryType filter should return correct results.");

      opener.done();

});

    const img = document.createElement("IMG");

    img.src = "http://example.org/tests/dom/performance/tests/logo.png";

    document.body.appendChild(img);

  </script>

</html>