Use a Finch Experiment to control the Browser Blacklist

chrome/browser/chrome_elf_init_unittest_win.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 "base/basictypes.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/test/test_reg_util_win.h"
+#include "chrome/browser/chrome_elf_init_win.h"
+#include "chrome/common/chrome_version_info.h"
+#include "chrome_elf/blacklist/blacklist.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class ChromeBlacklistTrialTest : public testing::Test {
+ protected:
+  ChromeBlacklistTrialTest() : blacklist_registry_key_(
+                                   HKEY_CURRENT_USER,
+                                   blacklist::kRegistryBeaconPath,
+                                   KEY_READ | KEY_WRITE) {}
+
+  virtual void SetUp() {
+    testing::Test::SetUp();
+
+    registry_util::RegistryOverrideManager override_manager;
+    override_manager.OverrideRegistry(HKEY_CURRENT_USER,
+                                      L"browser_blacklist_test");
+
+
+  }
+
+  DWORD GetBlacklistState() {
+    DWORD blacklist_state = 0;
+    blacklist_registry_key_.ReadValueDW(blacklist::kBeaconState,
+                                        &blacklist_state);
+
+    return blacklist_state;
+  }
+
+  base::string16 GetBlacklistVersion() {
+    std::wstring blacklist_version(L"");
+    blacklist_registry_key_.ReadValue(blacklist::kBeaconVersion,
+                                      &blacklist_version);
+
+    return blacklist_version;
+  }
+
+  base::win::RegKey blacklist_registry_key_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ChromeBlacklistTrialTest);
+};
+
+
+// Ensure that the default trial deletes any existing blacklist beacons.
+TEST_F(ChromeBlacklistTrialTest, DefaultRun) {
+  // Set some dummy values as beacons.
+  blacklist_registry_key_.WriteValue(blacklist::kBeaconState,
+                                     blacklist::BLACKLIST_ENABLED);
+  blacklist_registry_key_.WriteValue(blacklist::kBeaconVersion, L"Data");
+
+  // This setup code should result in the default group, which should remove
+  // all the beacon values.
+  SetupChromeElfInitialization();
+
+  // Ensure that all the beacon values are gone.
+  DWORD state = -1;
+  ASSERT_NE(ERROR_SUCCESS,
+            blacklist_registry_key_.ReadValueDW(blacklist::kBeaconState,
+                                                &state));
+  ASSERT_EQ(-1, state);
+
+  std::wstring version(L"");
+  ASSERT_NE(ERROR_SUCCESS,
+            blacklist_registry_key_.ReadValue(blacklist::kBeaconVersion,
+                                              &version));
+  ASSERT_EQ(L"", version);
+}
+
+TEST_F(ChromeBlacklistTrialTest, VerifyFirstRun) {
+  BrowserBlacklistBeaconSetup();
+
+  // Verify the state is properly set after the first run.
+  ASSERT_EQ(blacklist::BLACKLIST_ENABLED, GetBlacklistState());
+
+  chrome::VersionInfo version_info;
+  base::string16 version = base::UTF8ToUTF16(version_info.Version());
+  ASSERT_EQ(version, GetBlacklistVersion());
+}
+
+TEST_F(ChromeBlacklistTrialTest, SetupFailed) {
+  // Set the registry to indicate that the blacklist setup is running,
+  // which means it failed to run correctly last time.
+  blacklist_registry_key_.WriteValue(blacklist::kBeaconState,
+                                     blacklist::BLACKLIST_SETUP_RUNNING);
+
+   BrowserBlacklistBeaconSetup();
+
+  // Since the blacklist setup failed, it should now be disabled.
+  ASSERT_EQ(blacklist::BLACKLIST_DISABLED, GetBlacklistState());
+}
+
+TEST_F(ChromeBlacklistTrialTest, VersionChanged) {
+  // Mark the blacklist as disabled for an older version, so it should
+  // get enabled for this new version.
+  blacklist_registry_key_.WriteValue(blacklist::kBeaconVersion,
+                                     L"old_version");
+  blacklist_registry_key_.WriteValue(blacklist::kBeaconState,
+                                     blacklist::BLACKLIST_DISABLED);
+
+  BrowserBlacklistBeaconSetup();
+
+  // The beacon should now be marked as enabled for the current version.
+  ASSERT_EQ(blacklist::BLACKLIST_ENABLED, GetBlacklistState());
+
+  chrome::VersionInfo version_info;
+  base::string16 expected_version = base::UTF8ToUTF16(version_info.Version());
+  ASSERT_EQ(expected_version, GetBlacklistVersion());
+}