flutter-idea/testSrc/unit/io/flutter/perf/FlutterWidgetPerfTest.java [483:555]:
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  public void testOverallStatsCalculation_oldFormat() throws InterruptedException {
    final MockWidgetPerfProvider widgetPerfProvider = new MockWidgetPerfProvider();

    final FlutterWidgetPerf flutterWidgetPerf = new FlutterWidgetPerf(
      true,
      widgetPerfProvider,
      textEditor -> null,
      FakeFileLocationMapper::new
    );
    final MockPerfModel perfModel = new MockPerfModel();
    flutterWidgetPerf.addPerfListener(perfModel);

    widgetPerfProvider.simulateWidgetPerfEvent(
      PerfReportKind.rebuild,
      "{\"startTime\":1000,\"events\":[1,1,2,1,3,1,4,1,6,1,10,4,11,4,12,4,13,1,14,1,95,1,96,1,97,6,100,6,102,6,104,6,105,1,106,1],\"newLocations\":{\"/sample/project/main.dart\":[1,11,14,2,18,16,3,23,17,4,40,16,6,46,16,10,69,9,11,70,9,12,71,18,13,41,19,14,42,20,95,51,58],\"/sample/project/clock.dart\":[96,33,12,97,52,12,100,53,16,102,54,14,104,55,17,105,34,15,106,35,16]}}");

    // Simulate 60fps for 2 seconds.
    for (int frame = 1; frame <= 120; frame++) {
      final long startTime = 1000 + frame * 1000 * 1000 / 60;
      widgetPerfProvider.simulateWidgetPerfEvent(
        PerfReportKind.rebuild, "{\"startTime\":" +
                                startTime +
                                ",\"events\":[95,1,96,1,97,6,100,6,102,6,104,6,105,1,106,1]}");
    }
    final ArrayList<PerfMetric> lastFrameOnly = new ArrayList<>();
    lastFrameOnly.add(PerfMetric.lastFrame);
    final ArrayList<PerfMetric> metrics = new ArrayList<>();
    metrics.add(PerfMetric.lastFrame);
    metrics.add(PerfMetric.totalSinceEnteringCurrentScreen);

    ArrayList<SlidingWindowStatsSummary> stats = flutterWidgetPerf.getStatsForMetric(lastFrameOnly, PerfReportKind.repaint);
    // No repaint stats are provided.
    assertTrue(stats.isEmpty());

    stats = flutterWidgetPerf.getStatsForMetric(lastFrameOnly, PerfReportKind.rebuild);
    assertEquals(8, stats.size());

    for (SlidingWindowStatsSummary stat : stats) {
      assertTrue(stat.getValue(PerfMetric.lastFrame) > 0);
    }

    stats = flutterWidgetPerf.getStatsForMetric(metrics, PerfReportKind.rebuild);
    assertEquals(18, stats.size());
    for (SlidingWindowStatsSummary stat : stats) {
      assertTrue(stat.getValue(PerfMetric.lastFrame) > 0 ||
                 stat.getValue(PerfMetric.totalSinceEnteringCurrentScreen) > 0);
    }

    /// Test that the perfModel gets notified correctly when there are
    // events to draw a frame of the ui.
    assertEquals(perfModel.frameCount, 0);
    SwingUtilities.invokeLater(() -> {
      flutterWidgetPerf.requestRepaint(When.now);
    });

    while (perfModel.frameCount == 0) {
      try {
        //noinspection BusyWait
        Thread.sleep(1);
      }
      catch (InterruptedException e) {
        fail(e.toString());
      }
    }
    assertEquals(1, perfModel.frameCount);
    assertEquals(0, perfModel.idleCount);
    // Verify that an idle event occurs once we wait the idle time delay.
    Thread.sleep(IDLE_DELAY_MILISECONDS);
    assertEquals(1, perfModel.idleCount);

    flutterWidgetPerf.removePerfListener(perfModel);
    flutterWidgetPerf.dispose();
  }
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flutter-idea/testSrc/unit/io/flutter/perf/FlutterWidgetPerfTest.java [558:630]:
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  public void testOverallStatsCalculation_newFormat() throws InterruptedException {
    final MockWidgetPerfProvider widgetPerfProvider = new MockWidgetPerfProvider();

    final FlutterWidgetPerf flutterWidgetPerf = new FlutterWidgetPerf(
      true,
      widgetPerfProvider,
      textEditor -> null,
      FakeFileLocationMapper::new
    );
    final MockPerfModel perfModel = new MockPerfModel();
    flutterWidgetPerf.addPerfListener(perfModel);

    widgetPerfProvider.simulateWidgetPerfEvent(
      PerfReportKind.rebuild,
      "{\"startTime\":1000,\"events\":[1,1,2,1,3,1,4,1,6,1,10,4,11,4,12,4,13,1,14,1,95,1,96,1,97,6,100,6,102,6,104,6,105,1,106,1],\"locations\":{\"/sample/project/main.dart\":{\t\"ids\":[1, 2, 3, 4, 6, 10, 11, 12, 13, 14, 95],\"lines\":[11, 18, 23, 40, 46, 69, 70, 71, 41, 42, 51],\"columns\":[14, 16, 17, 16, 16, 9, 9, 18, 19, 20, 58],\"names\":[\"One\", \"Two\", \"Three\", \"Four\", \"Five\", \"Six\", \"Seven\", \"Eight\", \"Nine\", \"Ten\", \"Eleven\"]},\"/sample/project/clock.dart\":{\"ids\":[96, 97, 100, 102, 104, 105, 106],\"lines\":[33, 52, 53, 54, 55, 34, 35],\"columns\":[12, 12, 16, 14, 17, 15, 16],\"names\":[\"Twelve\", \"Thirteen\", \"Fourteen\", \"Fifteen\", \"Sixteen\", \"Seventeen\", \"Eighteen\"]}}}");

    // Simulate 60fps for 2 seconds.
    for (int frame = 1; frame <= 120; frame++) {
      final long startTime = 1000 + frame * 1000 * 1000 / 60;
      widgetPerfProvider.simulateWidgetPerfEvent(
        PerfReportKind.rebuild, "{\"startTime\":" +
                                startTime +
                                ",\"events\":[95,1,96,1,97,6,100,6,102,6,104,6,105,1,106,1]}");
    }
    final ArrayList<PerfMetric> lastFrameOnly = new ArrayList<>();
    lastFrameOnly.add(PerfMetric.lastFrame);
    final ArrayList<PerfMetric> metrics = new ArrayList<>();
    metrics.add(PerfMetric.lastFrame);
    metrics.add(PerfMetric.totalSinceEnteringCurrentScreen);

    ArrayList<SlidingWindowStatsSummary> stats = flutterWidgetPerf.getStatsForMetric(lastFrameOnly, PerfReportKind.repaint);
    // No repaint stats are provided.
    assertTrue(stats.isEmpty());

    stats = flutterWidgetPerf.getStatsForMetric(lastFrameOnly, PerfReportKind.rebuild);
    assertEquals(8, stats.size());

    for (SlidingWindowStatsSummary stat : stats) {
      assertTrue(stat.getValue(PerfMetric.lastFrame) > 0);
    }

    stats = flutterWidgetPerf.getStatsForMetric(metrics, PerfReportKind.rebuild);
    assertEquals(18, stats.size());
    for (SlidingWindowStatsSummary stat : stats) {
      assertTrue(stat.getValue(PerfMetric.lastFrame) > 0 ||
                 stat.getValue(PerfMetric.totalSinceEnteringCurrentScreen) > 0);
    }

    /// Test that the perfModel gets notified correctly when there are
    // events to draw a frame of the ui.
    assertEquals(perfModel.frameCount, 0);
    SwingUtilities.invokeLater(() -> {
      flutterWidgetPerf.requestRepaint(When.now);
    });

    while (perfModel.frameCount == 0) {
      try {
        //noinspection BusyWait
        Thread.sleep(1);
      }
      catch (InterruptedException e) {
        fail(e.toString());
      }
    }
    assertEquals(1, perfModel.frameCount);
    assertEquals(0, perfModel.idleCount);
    // Verify that an idle event occurs once we wait the idle time delay.
    Thread.sleep(IDLE_DELAY_MILISECONDS);
    assertEquals(1, perfModel.idleCount);

    flutterWidgetPerf.removePerfListener(perfModel);
    flutterWidgetPerf.dispose();
  }
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