[Sync] Move //components/sync_driver to //components/sync/driver.

components/sync_driver/device_count_metrics_provider_unittest.cc

-// Copyright 2016 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 "components/sync_driver/device_count_metrics_provider.h"
-
-#include <memory>
-#include <string>
-#include <vector>
-
-#include "base/bind.h"
-#include "base/test/histogram_tester.h"
-#include "components/sync_driver/device_info.h"
-#include "components/sync_driver/device_info_tracker.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace sync_driver {
-
-namespace {
-
-class FakeTracker : public DeviceInfoTracker {
- public:
-  explicit FakeTracker(const int count) : count_(count) {}
-
-  // DeviceInfoTracker
-  bool IsSyncing() const override { return false; }
-  std::unique_ptr<DeviceInfo> GetDeviceInfo(
-      const std::string& client_id) const override {
-    return std::unique_ptr<DeviceInfo>();
-  }
-  ScopedVector<DeviceInfo> GetAllDeviceInfo() const override {
-    return ScopedVector<DeviceInfo>();
-  }
-  void AddObserver(Observer* observer) override {}
-  void RemoveObserver(Observer* observer) override {}
-  int CountActiveDevices() const override { return count_; }
-
- private:
-  int count_;
-};
-
-}  // namespace
-
-class DeviceCountMetricsProviderTest : public testing::Test {
- public:
-  DeviceCountMetricsProviderTest()
-      : metrics_provider_(
-            base::Bind(&DeviceCountMetricsProviderTest::GetTrackers,
-                       base::Unretained(this))) {}
-
-  void AddTracker(const int count) {
-    trackers_.push_back(
-        std::unique_ptr<DeviceInfoTracker>(new FakeTracker(count)));
-  }
-  void GetTrackers(std::vector<const DeviceInfoTracker*>* trackers) {
-    for (const auto& tracker : trackers_) {
-      trackers->push_back(tracker.get());
-    }
-  }
-
-  void TestProvider(int expected_device_count) {
-    base::HistogramTester histogram_tester;
-    metrics_provider_.ProvideGeneralMetrics(nullptr);
-    histogram_tester.ExpectUniqueSample("Sync.DeviceCount",
-                                        expected_device_count, 1);
-  }
-
- private:
-  DeviceCountMetricsProvider metrics_provider_;
-  std::vector<std::unique_ptr<DeviceInfoTracker>> trackers_;
-};
-
-namespace {
-
-TEST_F(DeviceCountMetricsProviderTest, NoTrackers) {
-  TestProvider(0);
-}
-
-TEST_F(DeviceCountMetricsProviderTest, SingleTracker) {
-  AddTracker(2);
-  TestProvider(2);
-}
-
-TEST_F(DeviceCountMetricsProviderTest, MultipileTrackers) {
-  AddTracker(1);
-  AddTracker(5);
-  AddTracker(-123);
-  AddTracker(0);
-  TestProvider(5);
-}
-
-TEST_F(DeviceCountMetricsProviderTest, OnlyNegative) {
-  AddTracker(-123);
-  TestProvider(0);
-}
-
-TEST_F(DeviceCountMetricsProviderTest, VeryLarge) {
-  AddTracker(123456789);
-  TestProvider(100);
-}
-
-}  // namespace
-
-}  // namespace sync_driver