src/tests/end_to_end/inspect_metrics/test/appmgr_cpu_metrics_test.dart

// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:test/test.dart';
import 'package:sl4f/sl4f.dart' as sl4f;
import 'util.dart';

const String appmgrPath =
    'core/appmgr:root/cpu_stats/measurements/root/appmgr.cm';

void main() {
  sl4f.Sl4f sl4fDriver;
  sl4f.Inspect inspect;

  group('appmgr metrics', () {
    setUp(() async {
      sl4fDriver = sl4f.Sl4f.fromEnvironment();
      await sl4fDriver.startServer();
      inspect = sl4f.Inspect(sl4fDriver);
    });

    tearDown(() async {
      await sl4fDriver.stopServer();
      sl4fDriver.close();
    });

    tearDownAll(printErrorHelp);

    withLongTimeout(() {
      test('appmgr exposes cpu metrics for itself', () async {
        expect(
            await getInspectValues(
                inspect, '$appmgrPath/*/@samples/*:cpu_time'),
            multiValue(greaterThan(0), length: greaterThan(0)));
        expect(
            await getInspectValues(
                inspect, '$appmgrPath/*/@samples/*:queue_time'),
            multiValue(greaterThan(0), length: greaterThan(0)));
        expect(
            await getInspectValues(
                inspect, '$appmgrPath/*/@samples/*:timestamp'),
            multiValue(greaterThan(0), length: greaterThan(0)));
      });

      test('appmgr exposes stats on measurement time', () async {
        expect(
            await getInspectValues(
                inspect, 'core/appmgr:root/cpu_stats:process_time_ns'),
            singleValue(isNotEmpty));
      });

      test('appmgr exposes the number of tracked tasks', () async {
        expect(
            await getInspectValues(
                inspect, 'core/appmgr:root/cpu_stats:task_count'),
            singleValue(greaterThan(0)));
      });

      test('appmgr is not out of inspect space', () async {
        var size = await getInspectValues(
            inspect, 'core/appmgr:root/inspect_stats:current_size');
        var maxSize = await getInspectValues(
            inspect, 'core/appmgr:root/inspect_stats:maximum_size');

        expect(size, singleValue(greaterThan(0)));
        expect(maxSize, singleValue(greaterThan(0)));
        expect(maxSize, singleValue(greaterThan(size[0])));
      });

      test('appmgr is not out of inspect space for measurements', () async {
        var size = await getInspectValues(inspect,
            'core/appmgr:root/cpu_stats/measurements/@inspect:current_size');
        var maxSize = await getInspectValues(inspect,
            'core/appmgr:root/cpu_stats/measurements/@inspect:maximum_size');

        expect(size, singleValue(greaterThan(0)));
        expect(maxSize, singleValue(greaterThan(0)));
        // TODO(fxbug.dev/59235): Reenable once we support name deduplication.
        // expect(maxSize, singleValue(greaterThan(size[0])));
      });

      test('appmgr exposes overall recent cpu usage', () async {
        var allParams = await getInspectValues(
            inspect, 'core/appmgr:root/cpu_stats/recent_usage:*');
        expect(allParams, multiValue(isNonNegative, length: equals(6)));
      });
    });
  });
}