testing/web-platform/tests/measure-memory/randomized-breakdown.https.window.js

   1 // META: script=/common/get-host-info.sub.js
   2 // META: script=./resources/common.js
   3 // META: timeout=long
   4 'use strict';
   5
   6 function indexOfEmptyEntry(result) {
   7   return result.breakdown.findIndex(isEmptyBreakdownEntry);
   8 }
   9
  10 assert_true(self.crossOriginIsolated);
  11 promise_test(async testCase => {
  12   const initial = await performance.measureMemory();
  13   let observed_different_order = false;
  14   for (let i = 0; i < 100; ++i) {
  15     const current = await performance.measureMemory();
  16     if (indexOfEmptyEntry(initial) != indexOfEmptyEntry(current)) {
  17       observed_different_order = true;
  18     }
  19   }
  20   // The order of the breakdown entries must be randomized.
  21   // A conforming implementation may fail the following assert with
  22   // the probability of at most 2^-100 since there are at least two
  23   // entries in the breakdown.
  24   assert_true(observed_different_order);
  25 }, 'Well-formed result of performance.measureMemory.');