Move MetricsStateManager into the Metrics component.

chrome/browser/metrics/metrics_state_manager_unittest.cc

-// Copyright 2014 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/browser/metrics/metrics_state_manager.h"
-
-#include <ctype.h>
-#include <string>
-
-#include "base/bind.h"
-#include "base/command_line.h"
-#include "base/prefs/testing_pref_service.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/pref_names.h"
-#include "components/metrics/metrics_pref_names.h"
-#include "components/variations/caching_permuted_entropy_provider.h"
-#include "components/variations/pref_names.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace metrics {
-
-class MetricsStateManagerTest : public testing::Test {
- public:
-  MetricsStateManagerTest() : is_metrics_reporting_enabled_(false) {
-    MetricsStateManager::RegisterPrefs(prefs_.registry());
-  }
-
-  scoped_ptr<MetricsStateManager> CreateStateManager() {
-    return MetricsStateManager::Create(
-        &prefs_,
-        base::Bind(&MetricsStateManagerTest::is_metrics_reporting_enabled,
-                   base::Unretained(this))).Pass();
-  }
-
-  // Sets metrics reporting as enabled for testing.
-  void EnableMetricsReporting() {
-    is_metrics_reporting_enabled_ = true;
-  }
-
- protected:
-  TestingPrefServiceSimple prefs_;
-
- private:
-  bool is_metrics_reporting_enabled() const {
-    return is_metrics_reporting_enabled_;
-  }
-
-  bool is_metrics_reporting_enabled_;
-
-  DISALLOW_COPY_AND_ASSIGN(MetricsStateManagerTest);
-};
-
-// Ensure the ClientId is formatted as expected.
-TEST_F(MetricsStateManagerTest, ClientIdCorrectlyFormatted) {
-  scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
-  state_manager->ForceClientIdCreation();
-
-  const std::string client_id = state_manager->client_id();
-  EXPECT_EQ(36U, client_id.length());
-
-  for (size_t i = 0; i < client_id.length(); ++i) {
-    char current = client_id[i];
-    if (i == 8 || i == 13 || i == 18 || i == 23)
-      EXPECT_EQ('-', current);
-    else
-      EXPECT_TRUE(isxdigit(current));
-  }
-}
-
-TEST_F(MetricsStateManagerTest, EntropySourceUsed_Low) {
-  scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
-  state_manager->CreateEntropyProvider();
-  EXPECT_EQ(MetricsStateManager::ENTROPY_SOURCE_LOW,
-            state_manager->entropy_source_returned());
-}
-
-TEST_F(MetricsStateManagerTest, EntropySourceUsed_High) {
-  EnableMetricsReporting();
-  scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
-  state_manager->CreateEntropyProvider();
-  EXPECT_EQ(MetricsStateManager::ENTROPY_SOURCE_HIGH,
-            state_manager->entropy_source_returned());
-}
-
-TEST_F(MetricsStateManagerTest, LowEntropySource0NotReset) {
-  scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
-
-  // Get the low entropy source once, to initialize it.
-  state_manager->GetLowEntropySource();
-
-  // Now, set it to 0 and ensure it doesn't get reset.
-  state_manager->low_entropy_source_ = 0;
-  EXPECT_EQ(0, state_manager->GetLowEntropySource());
-  // Call it another time, just to make sure.
-  EXPECT_EQ(0, state_manager->GetLowEntropySource());
-}
-
-TEST_F(MetricsStateManagerTest,
-       PermutedEntropyCacheClearedWhenLowEntropyReset) {
-  const PrefService::Preference* low_entropy_pref =
-      prefs_.FindPreference(::prefs::kMetricsLowEntropySource);
-  const char* kCachePrefName = prefs::kVariationsPermutedEntropyCache;
-  int low_entropy_value = -1;
-
-  // First, generate an initial low entropy source value.
-  {
-    EXPECT_TRUE(low_entropy_pref->IsDefaultValue());
-
-    scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
-    state_manager->GetLowEntropySource();
-
-    EXPECT_FALSE(low_entropy_pref->IsDefaultValue());
-    EXPECT_TRUE(low_entropy_pref->GetValue()->GetAsInteger(&low_entropy_value));
-  }
-
-  // Now, set a dummy value in the permuted entropy cache pref and verify that
-  // another call to GetLowEntropySource() doesn't clobber it when
-  // --reset-variation-state wasn't specified.
-  {
-    prefs_.SetString(kCachePrefName, "test");
-
-    scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
-    state_manager->GetLowEntropySource();
-
-    EXPECT_EQ("test", prefs_.GetString(kCachePrefName));
-    EXPECT_EQ(low_entropy_value,
-              prefs_.GetInteger(::prefs::kMetricsLowEntropySource));
-  }
-
-  // Verify that the cache does get reset if --reset-variations-state is passed.
-  {
-    CommandLine::ForCurrentProcess()->AppendSwitch(
-        switches::kResetVariationState);
-
-    scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
-    state_manager->GetLowEntropySource();
-
-    EXPECT_TRUE(prefs_.GetString(kCachePrefName).empty());
-  }
-}
-
-// Check that setting the kMetricsResetIds pref to true causes the client id to
-// be reset. We do not check that the low entropy source is reset because we
-// cannot ensure that metrics state manager won't generate the same id again.
-TEST_F(MetricsStateManagerTest, ResetMetricsIDs) {
-  // Set an initial client id in prefs. It should not be possible for the
-  // metrics state manager to generate this id randomly.
-  const std::string kInitialClientId = "initial client id";
-  prefs_.SetString(::prefs::kMetricsClientID, kInitialClientId);
-
-  // Make sure the initial client id isn't reset by the metrics state manager.
-  {
-    scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
-    state_manager->ForceClientIdCreation();
-    EXPECT_EQ(kInitialClientId, state_manager->client_id());
-  }
-
-  // Set the reset pref to cause the IDs to be reset.
-  prefs_.SetBoolean(prefs::kMetricsResetIds, true);
-
-  // Cause the actual reset to happen.
-  {
-    scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
-    state_manager->ForceClientIdCreation();
-    EXPECT_NE(kInitialClientId, state_manager->client_id());
-
-    state_manager->GetLowEntropySource();
-
-    EXPECT_FALSE(prefs_.GetBoolean(prefs::kMetricsResetIds));
-  }
-
-  EXPECT_NE(kInitialClientId, prefs_.GetString(::prefs::kMetricsClientID));
-}
-
-}  // namespace metrics