Move part of metrics from chrome/common to components

chrome/common/metrics/metrics_log_base_unittest.cc

-// 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 "chrome/common/metrics/metrics_log_base.h"
-
-#include <string>
-
-#include "base/base64.h"
-#include "base/metrics/bucket_ranges.h"
-#include "base/metrics/sample_vector.h"
-#include "chrome/common/metrics/proto/chrome_user_metrics_extension.pb.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace {
-
-class TestMetricsLogBase : public MetricsLogBase {
- public:
-  TestMetricsLogBase()
-      : MetricsLogBase("client_id", 1, MetricsLogBase::ONGOING_LOG, "1.2.3.4") {
-  }
-  virtual ~TestMetricsLogBase() {}
-
-  using MetricsLogBase::uma_proto;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TestMetricsLogBase);
-};
-
-}  // namespace
-
-TEST(MetricsLogBaseTest, LogType) {
-  MetricsLogBase log1("id", 0, MetricsLogBase::ONGOING_LOG, "1.2.3");
-  EXPECT_EQ(MetricsLogBase::ONGOING_LOG, log1.log_type());
-
-  MetricsLogBase log2("id", 0, MetricsLogBase::INITIAL_STABILITY_LOG, "1.2.3");
-  EXPECT_EQ(MetricsLogBase::INITIAL_STABILITY_LOG, log2.log_type());
-}
-
-TEST(MetricsLogBaseTest, EmptyRecord) {
-  MetricsLogBase log("totally bogus client ID", 137,
-                     MetricsLogBase::ONGOING_LOG, "bogus version");
-  log.set_hardware_class("sample-class");
-  log.CloseLog();
-
-  std::string encoded;
-  log.GetEncodedLog(&encoded);
-
-  // A couple of fields are hard to mock, so these will be copied over directly
-  // for the expected output.
-  metrics::ChromeUserMetricsExtension parsed;
-  ASSERT_TRUE(parsed.ParseFromString(encoded));
-
-  metrics::ChromeUserMetricsExtension expected;
-  expected.set_client_id(5217101509553811875);  // Hashed bogus client ID
-  expected.set_session_id(137);
-  expected.mutable_system_profile()->set_build_timestamp(
-      parsed.system_profile().build_timestamp());
-  expected.mutable_system_profile()->set_app_version("bogus version");
-  expected.mutable_system_profile()->set_channel(
-      parsed.system_profile().channel());
-  expected.mutable_system_profile()->mutable_hardware()->set_hardware_class(
-      "sample-class");
-
-  EXPECT_EQ(expected.SerializeAsString(), encoded);
-}
-
-TEST(MetricsLogBaseTest, HistogramBucketFields) {
-  // Create buckets: 1-5, 5-7, 7-8, 8-9, 9-10, 10-11, 11-12.
-  base::BucketRanges ranges(8);
-  ranges.set_range(0, 1);
-  ranges.set_range(1, 5);
-  ranges.set_range(2, 7);
-  ranges.set_range(3, 8);
-  ranges.set_range(4, 9);
-  ranges.set_range(5, 10);
-  ranges.set_range(6, 11);
-  ranges.set_range(7, 12);
-
-  base::SampleVector samples(&ranges);
-  samples.Accumulate(3, 1);  // Bucket 1-5.
-  samples.Accumulate(6, 1);  // Bucket 5-7.
-  samples.Accumulate(8, 1);  // Bucket 8-9. (7-8 skipped)
-  samples.Accumulate(10, 1);  // Bucket 10-11. (9-10 skipped)
-  samples.Accumulate(11, 1);  // Bucket 11-12.
-
-  TestMetricsLogBase log;
-  log.RecordHistogramDelta("Test", samples);
-
-  const metrics::ChromeUserMetricsExtension* uma_proto = log.uma_proto();
-  const metrics::HistogramEventProto& histogram_proto =
-      uma_proto->histogram_event(uma_proto->histogram_event_size() - 1);
-
-  // Buckets with samples: 1-5, 5-7, 8-9, 10-11, 11-12.
-  // Should become: 1-/, 5-7, /-9, 10-/, /-12.
-  ASSERT_EQ(5, histogram_proto.bucket_size());
-
-  // 1-5 becomes 1-/ (max is same as next min).
-  EXPECT_TRUE(histogram_proto.bucket(0).has_min());
-  EXPECT_FALSE(histogram_proto.bucket(0).has_max());
-  EXPECT_EQ(1, histogram_proto.bucket(0).min());
-
-  // 5-7 stays 5-7 (no optimization possible).
-  EXPECT_TRUE(histogram_proto.bucket(1).has_min());
-  EXPECT_TRUE(histogram_proto.bucket(1).has_max());
-  EXPECT_EQ(5, histogram_proto.bucket(1).min());
-  EXPECT_EQ(7, histogram_proto.bucket(1).max());
-
-  // 8-9 becomes /-9 (min is same as max - 1).
-  EXPECT_FALSE(histogram_proto.bucket(2).has_min());
-  EXPECT_TRUE(histogram_proto.bucket(2).has_max());
-  EXPECT_EQ(9, histogram_proto.bucket(2).max());
-
-  // 10-11 becomes 10-/ (both optimizations apply, omit max is prioritized).
-  EXPECT_TRUE(histogram_proto.bucket(3).has_min());
-  EXPECT_FALSE(histogram_proto.bucket(3).has_max());
-  EXPECT_EQ(10, histogram_proto.bucket(3).min());
-
-  // 11-12 becomes /-12 (last record must keep max, min is same as max - 1).
-  EXPECT_FALSE(histogram_proto.bucket(4).has_min());
-  EXPECT_TRUE(histogram_proto.bucket(4).has_max());
-  EXPECT_EQ(12, histogram_proto.bucket(4).max());
-}