| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/file_util.h" |
| #include "base/files/scoped_temp_dir.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/metrics/statistics_recorder.h" |
| #include "chrome/browser/chromeos/external_metrics.h" |
| #include "chrome/test/base/uma_histogram_helper.h" |
| #include "components/metrics/chromeos/metric_sample.h" |
| #include "components/metrics/chromeos/serialization_utils.h" |
| #include "content/public/test/test_browser_thread_bundle.h" |
| |
| namespace chromeos { // Need this because of the FRIEND_TEST |
| |
| class ExternalMetricsTest : public testing::Test { |
| public: |
| virtual void SetUp() OVERRIDE { |
| ASSERT_TRUE(dir_.CreateUniqueTempDir()); |
| external_metrics_ = ExternalMetrics::CreateForTesting( |
| dir_.path().Append("testfile").value()); |
| |
| base::StatisticsRecorder::Initialize(); |
| } |
| |
| base::ScopedTempDir dir_; |
| scoped_refptr<ExternalMetrics> external_metrics_; |
| content::TestBrowserThreadBundle thread_bundle_; |
| }; |
| |
| TEST_F(ExternalMetricsTest, HandleMissingFile) { |
| ASSERT_TRUE(base::DeleteFile( |
| base::FilePath(external_metrics_->uma_events_file_), false)); |
| |
| EXPECT_EQ(0, external_metrics_->CollectEvents()); |
| } |
| |
| TEST_F(ExternalMetricsTest, CanReceiveHistogram) { |
| scoped_ptr<metrics::MetricSample> hist = |
| metrics::MetricSample::HistogramSample("foo", 2, 1, 100, 10); |
| |
| EXPECT_TRUE(metrics::SerializationUtils::WriteMetricToFile( |
| *hist.get(), external_metrics_->uma_events_file_)); |
| |
| EXPECT_EQ(1, external_metrics_->CollectEvents()); |
| |
| UMAHistogramHelper helper; |
| helper.Fetch(); |
| helper.ExpectTotalCount("foo", 1); |
| } |
| |
| TEST_F(ExternalMetricsTest, IncorrectHistogramsAreDiscarded) { |
| // Malformed histogram (min > max). |
| scoped_ptr<metrics::MetricSample> hist = |
| metrics::MetricSample::HistogramSample("bar", 30, 200, 20, 10); |
| |
| EXPECT_TRUE(metrics::SerializationUtils::WriteMetricToFile( |
| *hist.get(), external_metrics_->uma_events_file_)); |
| |
| external_metrics_->CollectEvents(); |
| |
| UMAHistogramHelper helper; |
| helper.Fetch(); |
| helper.ExpectTotalCount("bar", 0); |
| } |
| |
| } // namespace chromeos |