].forEach(([filter, expected]) => {
    let rootMarkerNode = WaterfallUtils.createParentNode({ name: "(root)" });

    WaterfallUtils.collapseMarkersIntoNode({
      rootNode: rootMarkerNode,
      markersList: gTestMarkers,
      filter
    });

    compare(rootMarkerNode, expected);
  });
add_task(function test() {
  const WaterfallUtils = require("devtools/client/performance/modules/logic/waterfall-utils");

  let rootMarkerNode = WaterfallUtils.createParentNode({ name: "(root)" });

  WaterfallUtils.collapseMarkersIntoNode({
    rootNode: rootMarkerNode,
    markersList: gTestMarkers
  });

  function compare (marker, expected) {
    for (let prop in expected) {
      if (prop === "submarkers") {
        for (let i = 0; i < expected.submarkers.length; i++) {
          compare(marker.submarkers[i], expected.submarkers[i]);
        }
      } else if (prop !== "uid") {
        equal(marker[prop], expected[prop], `${expected.name} matches ${prop}`);
      }
    }
  }

  compare(rootMarkerNode, gExpectedOutput);
});