devtools/server/tests/browser/browser_markers-cycle-collection.js


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/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

/**
 * Test that we get "nsCycleCollector::Collect" and
 * "nsCycleCollector::ForgetSkippable" markers when we force cycle collection.
 */

const { PerformanceFront } = require("devtools/shared/fronts/performance");

add_task(function* () {
  // This test runs very slowly on linux32 debug EC2 instances.
  requestLongerTimeout(2);

  let browser = yield addTab(MAIN_DOMAIN + "doc_force_cc.html");
  let doc = browser.contentDocument;

  initDebuggerServer();
  let client = new DebuggerClient(DebuggerServer.connectPipe());
  let form = yield connectDebuggerClient(client);
  let front = PerformanceFront(client, form);
  yield front.connect();
  let rec = yield front.startRecording({ withMarkers: true });

  let markers = yield waitForMarkerType(front, ["nsCycleCollector::Collect", "nsCycleCollector::ForgetSkippable"]);
  yield front.stopRecording(rec);

  ok(markers.some(m => m.name === "nsCycleCollector::Collect"), "got some nsCycleCollector::Collect markers");
  ok(markers.some(m => m.name === "nsCycleCollector::ForgetSkippable"), "got some nsCycleCollector::Collect markers");

  yield client.close();
  gBrowser.removeCurrentTab();
});