po-observe-repeated-type.any.js

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This WPT test may be referenced by the following Test IDs:
- /performance-timeline/po-observe-repeated-type.any.html - WPT Dashboard Interop Dashboard
- /performance-timeline/po-observe-repeated-type.any.worker.html - WPT Dashboard Interop Dashboard

// META: script=performanceobservers.js

async_test(function (t) {

  const observer  = new PerformanceObserver(

      t.step_func(function (entryList) {

        checkEntries(entryList.getEntries(),

          [{ entryType: "mark", name: "early"}]);

        observer.disconnect();

        t.done();

})

);

  performance.mark("early");

  // This call will not trigger anything.

  observer.observe({type: "mark"});

  // This call should override the previous call and detect the early mark.

  observer.observe({type: "mark", buffered: true});

}, "Two calls of observe() with the same 'type' cause override.");