metrics_service_observer_unittest.cc

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "components/metrics/metrics_service_observer.h"

#include "base/base64.h"
#include "base/callback_list.h"
#include "base/json/json_string_value_serializer.h"
#include "base/task/single_thread_task_runner.h"
#include "base/test/bind.h"
#include "base/test/task_environment.h"
#include "components/metrics/log_decoder.h"
#include "components/metrics/metrics_log.h"
#include "components/metrics/metrics_logs_event_manager.h"
#include "components/metrics/metrics_pref_names.h"
#include "components/metrics/metrics_scheduler.h"
#include "components/metrics/metrics_service.h"
#include "components/metrics/metrics_state_manager.h"
#include "components/metrics/metrics_upload_scheduler.h"
#include "components/metrics/test/test_enabled_state_provider.h"
#include "components/metrics/test/test_metrics_service_client.h"
#include "components/metrics/unsent_log_store_metrics_impl.h"
#include "components/prefs/testing_pref_service.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/metrics_proto/chrome_user_metrics_extension.pb.h"

namespace metrics {
namespace {

class MetricsServiceObserverTest : public testing::Test { … };

class MetricsServiceObserverExportTest
    : public MetricsServiceObserverTest,
      public testing::WithParamInterface<bool> { … };

}  // namespace

// Verifies that MetricsServiceObserver is notified when a log is created,
// staged, uploading, uploaded, and finally discarded.
TEST_F(MetricsServiceObserverTest, SuccessfulLogUpload) { … }

// Verifies that MetricsServiceObserver is notified when 1) a log is re-staged
// to be re-transmitted after failing to be uploaded, and 2) a log is discarded
// after failing to be uploaded because of a bad request.
TEST_F(MetricsServiceObserverTest, UnsuccessfulLogUpload) { … }

// Verifies that MetricsServiceObserver is notified when a log that is too
// large gets trimmed.
TEST_F(MetricsServiceObserverTest, TrimLargeLog) { … }

// Verifies that MetricsServiceObserver is notified when logs are trimmed due to
// enough logs being stored.
TEST_F(MetricsServiceObserverTest, TrimLongLogList) { … }

// Verifies that logs created through MetricsLogStore, which is used by UMA, are
// annotated with a type (ongoing, independent, or stability).
TEST_F(MetricsServiceObserverTest, UmaLogType) { … }

INSTANTIATE_TEST_SUITE_P(…);

// Verifies that MetricsServiceObserver::ExportLogsAsJson() returns a valid
// JSON string that represents the logs that the observer is aware of.
// This test is parameterized (bool parameter). When the parameter is true,
// we should include log proto data when exporting. When false, log proto data
// should not be included.
TEST_P(MetricsServiceObserverExportTest, ExportLogsAsJson) { … }

// Verifies that callbacks registered to a MetricsServiceObserver instance are
// run every time it is notified.
TEST_F(MetricsServiceObserverTest, NotifiedCallbacks) { … }

}  // namespace metrics
chromium/components/metrics/metrics_service_observer_unittest.cc
