Add a Rappor option in the settings page.

chrome/browser/metrics/metrics_services_manager_unittest.cc

+// Copyright 2015 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_services_manager.h"
+
+#include <string>
+
+#include "base/prefs/testing_pref_service.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/test/base/testing_browser_process.h"
+#include "chrome/test/base/testing_profile_manager.h"
+#include "components/rappor/rappor_pref_names.h"
+#include "components/rappor/rappor_prefs.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class MetricsServicesManagerTest : public testing::Test {
+ public:
+  MetricsServicesManagerTest()
+      : test_profile_manager_(TestingBrowserProcess::GetGlobal()) {
+    rappor::internal::RegisterPrefs(test_prefs_.registry());
+  }
+
+  void SetUp() override {
+    ASSERT_TRUE(test_profile_manager_.SetUp());
+  }
+
+  void CreateProfile(const std::string& name, bool sb_enabled) {
+    TestingProfile* profile = test_profile_manager_.CreateTestingProfile(name);
+    profile->GetPrefs()->SetBoolean(prefs::kSafeBrowsingEnabled, sb_enabled);
+  }
+
+ protected:
+  TestingProfileManager test_profile_manager_;
+  TestingPrefServiceSimple test_prefs_;
+
+  DISALLOW_COPY_AND_ASSIGN(MetricsServicesManagerTest);

[Alexei Svitkine (slow), 2015/02/09 16:10:47]

This macro should be in the private section.

[Steven Holte, 2015/02/09 20:17:38]

Done.

+};
+
+TEST_F(MetricsServicesManagerTest, CheckRapporDefaultDisable) {
+  MetricsServicesManager manager(&test_prefs_);
+  test_prefs_.ClearPref(rappor::prefs::kRapporEnabled);
+  CreateProfile("profile1", true);
+  CreateProfile("profile2", false);
+  bool uma_enabled = false;
+  EXPECT_FALSE(manager.IsRapporEnabled(uma_enabled));
+  EXPECT_TRUE(test_prefs_.HasPrefPath(rappor::prefs::kRapporEnabled));
+}
+
+TEST_F(MetricsServicesManagerTest, CheckRapporDefaultEnabledBySafeBrowsing) {
+  MetricsServicesManager manager(&test_prefs_);
+  test_prefs_.ClearPref(rappor::prefs::kRapporEnabled);
+  CreateProfile("profile1", true);
+  CreateProfile("profile2", true);
+  bool uma_enabled = false;
+  EXPECT_TRUE(manager.IsRapporEnabled(uma_enabled));
+  EXPECT_TRUE(test_prefs_.HasPrefPath(rappor::prefs::kRapporEnabled));
+}
+
+TEST_F(MetricsServicesManagerTest, CheckRapporDefaultEnabledByUMA) {
+  MetricsServicesManager manager(&test_prefs_);
+  test_prefs_.ClearPref(rappor::prefs::kRapporEnabled);

[Alexei Svitkine (slow), 2015/02/09 16:10:47]

If every test starts with these two lines, put them in the harness class, with
the manager being a member. You can expose a getter for it and keep it private.

[Steven Holte, 2015/02/09 20:17:38]

Moved MetricsServicesManager to harness.  The ClearPref call is not used in all
of the sets, later ones use SetBoolean here instead.  The ClearPref call is not
technically necessary, since the fresh TestingPrefService shouldn't have a pref
set anyway, but I'm including it for documentation purposes, since the behavior
when this pref has not been set is what is being tested.

+  CreateProfile("profile1", false);
+  CreateProfile("profile2", false);
+  bool uma_enabled = true;
+  EXPECT_TRUE(manager.IsRapporEnabled(uma_enabled));
+  EXPECT_TRUE(test_prefs_.HasPrefPath(rappor::prefs::kRapporEnabled));
+}
+
+TEST_F(MetricsServicesManagerTest, CheckRapporEnable) {
+  MetricsServicesManager manager(&test_prefs_);
+  test_prefs_.SetBoolean(rappor::prefs::kRapporEnabled, true);
+  CreateProfile("profile1", false);
+  CreateProfile("profile2", false);
+  bool uma_enabled = false;
+  EXPECT_TRUE(manager.IsRapporEnabled(uma_enabled));
+}
+
+TEST_F(MetricsServicesManagerTest, CheckRapporDisable) {
+  MetricsServicesManager manager(&test_prefs_);
+  test_prefs_.SetBoolean(rappor::prefs::kRapporEnabled, false);
+  CreateProfile("profile1", true);
+  CreateProfile("profile2", true);
+  bool uma_enabled = true;
+  EXPECT_FALSE(manager.IsRapporEnabled(uma_enabled));
+}