Adding unit tests to RLZ code. Refactoring RLZ code to make it more testable.

chrome/browser/rlz/rlz_unittest.cc

 // Copyright (c) 2011 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/rlz/rlz.h"
 
+#include "base/memory/scoped_ptr.h"
+#include "base/stringprintf.h"
 #include "base/path_service.h"
+#include "base/test/test_reg_util_win.h"
+#include "base/utf_string_conversions.h"
 #include "base/win/registry.h"
+#include "chrome/browser/autocomplete/autocomplete.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/env_vars.h"
+#include "chrome/installer/util/browser_distribution.h"
+#include "chrome/installer/util/google_update_constants.h"
+#include "chrome/test/base/testing_browser_process_test.h"
+#include "content/browser/tab_contents/navigation_entry.h"
+#include "content/common/notification_details.h"
+#include "content/common/notification_source.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::win::RegKey;
+using registry_util::RegistryOverrideManager;
+using testing::AssertionResult;
+using testing::AssertionSuccess;
+using testing::AssertionFailure;
 
 namespace {
 
-// Gets rid of registry leftovers from testing. Returns false if there
-// is nothing to clean.
-bool CleanValue(const wchar_t* key_name, const wchar_t* value) {
-  RegKey key;
-  if (key.Open(HKEY_CURRENT_USER, key_name, KEY_READ | KEY_WRITE) !=
-      ERROR_SUCCESS)
-    return false;
-  EXPECT_EQ(ERROR_SUCCESS, key.DeleteValue(value));
-  return true;
-}
-
-// The chrome events RLZ key lives here.
-const wchar_t kKeyName[] = L"Software\\Google\\Common\\Rlz\\Events\\C";
+// Registry path to overridden hive.
+const wchar_t kRlzTempHkcu[] = L"rlz_hkcu";
+const wchar_t kRlzTempHklm[] = L"rlz_hklm";
+
+// Dummy RLZ string for the access points.
+const char kOmniboxRlzString[] = "test_omnibox";
+const char kHomepageRlzString[] = "test_homepage";
+
+// Some helper macros to test it a string contains/does not contain a substring.
+
+AssertionResult CmpHelperSTRC(const char* str_expression,
+                              const char* substr_expression,
+                              const char* str,
+                              const char* substr) {
+  if (NULL != strstr(str, substr)) {
+    return AssertionSuccess();
+  }
+
+  return AssertionFailure() << "Expected: (" << substr_expression << ") in ("
+                            << str_expression << "), actual: '"
+                            << substr << "' not in '" << str << "'";
+}
+
+AssertionResult CmpHelperSTRNC(const char* str_expression,
+                               const char* substr_expression,
+                               const char* str,
+                               const char* substr) {
+  if (NULL == strstr(str, substr)) {
+    return AssertionSuccess();
+  }
+
+  return AssertionFailure() << "Expected: (" << substr_expression
+                            << ") not in (" << str_expression << "), actual: '"
+                            << substr << "' in '" << str << "'";
+}
+
+#define EXPECT_STR_CONTAINS(str, substr) \
+    EXPECT_PRED_FORMAT2(CmpHelperSTRC, str, substr)
+
+#define EXPECT_STR_NOT_CONTAIN(str, substr) \
+    EXPECT_PRED_FORMAT2(CmpHelperSTRNC, str, substr)

[cpu_(ooo_6.6-7.5), 2011/08/26 21:37:51]

remove lines 33 to 73, this is overkill and only used once.

[Roger Tawa OOO till Jul 10th, 2011/08/27 02:00:06]

I think you meant 41-73.  Actually, I disagree.  If you look at how
EXPECT_PRED_FORMAT2() is implemented, it would be more difficult to integrate
with the existing gtest infrastructure and have the same output for consistency,
etc.  If I'm missing something please let me know.

Also, my plan is to eventually move this to a more common place so its available
to other tests.

[cpu_(ooo_6.6-7.5), 2011/08/29 19:43:04]

basically on the only place where is called

if (NULL == strstr(str, substr))
  FAIL() << str; 

Or maybe use ASSERT_PRED1

 
 }  // namespace
 
-TEST(RlzLibTest, RecordProductEvent) {
-  DWORD recorded_value = 0;
-  EXPECT_TRUE(RLZTracker::RecordProductEvent(rlz_lib::CHROME,
-      rlz_lib::CHROME_OMNIBOX, rlz_lib::FIRST_SEARCH));
-  const wchar_t kEvent1[] = L"C1F";
-  RegKey key1;
-  EXPECT_EQ(ERROR_SUCCESS, key1.Open(HKEY_CURRENT_USER, kKeyName, KEY_READ));
-  EXPECT_EQ(ERROR_SUCCESS, key1.ReadValueDW(kEvent1, &recorded_value));
-  EXPECT_EQ(1, recorded_value);
-  EXPECT_TRUE(CleanValue(kKeyName, kEvent1));
-
-  EXPECT_TRUE(RLZTracker::RecordProductEvent(rlz_lib::CHROME,
-      rlz_lib::CHROME_HOME_PAGE, rlz_lib::SET_TO_GOOGLE));
-  const wchar_t kEvent2[] = L"C2S";
-  RegKey key2;
-  EXPECT_EQ(ERROR_SUCCESS, key2.Open(HKEY_CURRENT_USER, kKeyName, KEY_READ));
-  DWORD value = 0;
-  EXPECT_EQ(ERROR_SUCCESS, key2.ReadValueDW(kEvent2, &recorded_value));
-  EXPECT_EQ(1, recorded_value);
-  EXPECT_TRUE(CleanValue(kKeyName, kEvent2));
-}
+// Test class for RLZ tracker.  Makes some member functions public and
+// overrides others to make it easier to test.
+class TestRLZTracker : public RLZTracker {
+ public:
+  using RLZTracker::DelayedInit;
+  using RLZTracker::Observe;
+  using RLZTracker::RLZ_PAGETRANSITION_HOME_PAGE;
+
+  TestRLZTracker() : pingnow_called_(false), assume_io_thread_(false) {
+    set_tracker(this);
+  }
+
+  virtual ~TestRLZTracker() {
+    set_tracker(NULL);
+  }
+
+  bool pingnow_called() {

[cpu_(ooo_6.6-7.5), 2011/08/26 21:37:51]

const function

[Roger Tawa OOO till Jul 10th, 2011/08/27 02:00:06]

Done.

+    return pingnow_called_;
+  }
+
+  bool assume_io_thread() {
+    return assume_io_thread_;

[cpu_(ooo_6.6-7.5), 2011/08/26 21:37:51]

const function

[Roger Tawa OOO till Jul 10th, 2011/08/27 02:00:06]

Done.

+  }
+
+  void set_assume_io_thread(bool assume_io_thread) {
+    assume_io_thread_ = assume_io_thread;
+  }
+
+ private:
+  virtual void ScheduleDelayedInit(int delay) OVERRIDE {
+    // If the delay is 0, invoke the delayed init now.  Otherwise,
+    // don't schedule anything, it will be manually called during tests.
+    if (delay == 0)
+      DelayedInit();
+  }
+
+  virtual void ScheduleFinancialPing() OVERRIDE {
+    PingNow(this);
+  }
+
+  virtual bool ScheduleGetAccessPointRlz(rlz_lib::AccessPoint point) OVERRIDE {
+    return !assume_io_thread_;
+  }
+
+  virtual bool SendFinancialPing(const std::wstring& brand,
+                                 const std::wstring& lang,
+                                 const std::wstring& referral,
+                                 bool exclude_id) OVERRIDE {
+    // Don't ping the server during tests.
+    pingnow_called_ = true;
+    return true;
+  }
+
+  bool pingnow_called_;
+  bool assume_io_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestRLZTracker);
+};
+
+class RlzLibTest : public TestingBrowserProcessTest {
+  virtual void SetUp() OVERRIDE;
+  virtual void TearDown() OVERRIDE;
+
+ protected:
+  RlzLibTest();
+  ~RlzLibTest();
+
+  void SimulateOmniboxUsage();
+  void SimulateHomepageUsage();
+  void InvokeDelayedInit();
+
+  void ExpectEventRecorded(const char* event_name, bool expected);
+  void ExpectRlzPingSent(bool expected);
+
+  TestRLZTracker tracker_;
+  RegistryOverrideManager override_manager_;
+  wchar_t env_var_[64];
+};
+
+RlzLibTest::RlzLibTest() {
+}
+
+RlzLibTest::~RlzLibTest() {
+}

[cpu_(ooo_6.6-7.5), 2011/08/26 21:37:51]

remove lines 156 - 160

[Roger Tawa OOO till Jul 10th, 2011/08/27 02:00:06]

Done.

+
+void RlzLibTest::SetUp() {
+  TestingBrowserProcessTest::SetUp();
+
+  // Make sure HEADLESS environment variable is not set.
+  env_var_[0] = 0;
+  DWORD size = ::GetEnvironmentVariableW(
+      ASCIIToWide(env_vars::kHeadless).c_str(), env_var_, arraysize(env_var_));
+  if (size == 0)
+    ASSERT_EQ(ERROR_ENVVAR_NOT_FOUND, ::GetLastError());
+  ASSERT_LT(size, arraysize(env_var_));
+
+  ::SetEnvironmentVariable(ASCIIToWide(env_vars::kHeadless).c_str(), NULL);

[cpu_(ooo_6.6-7.5), 2011/08/26 21:37:51]

why?

[Roger Tawa OOO till Jul 10th, 2011/08/27 02:00:06]

See rlz.cc, line 213.  It seems like headless may defined for some tests, so
just to be safe I am clearing this env var to make sure the code will actually
run.

[cpu_(ooo_6.6-7.5), 2011/08/29 19:43:04]

Hmmm... better ask Pawel. Sounds fishy to me.

+
+  // Before overriding HKLM for the tests, we need to set it up correctly
+  // so that the rlz_lib calls work.  This needs to be done before we do the
+  // override.
+
+  std::wstring temp_hklm_path = base::StringPrintf(
+      L"%ls\\%ls",
+      RegistryOverrideManager::kTempTestKeyPath,
+      kRlzTempHklm);
+
+  base::win::RegKey hklm;
+  ASSERT_EQ(ERROR_SUCCESS, hklm.Create(HKEY_CURRENT_USER,
+                                       temp_hklm_path.c_str(),
+                                       KEY_READ));
+
+  std::wstring temp_hkcu_path = base::StringPrintf(
+      L"%ls\\%ls",
+      RegistryOverrideManager::kTempTestKeyPath,
+      kRlzTempHkcu);
+
+  base::win::RegKey hkcu;
+  ASSERT_EQ(ERROR_SUCCESS, hkcu.Create(HKEY_CURRENT_USER,
+                                       temp_hkcu_path.c_str(),
+                                       KEY_READ));
+
+  rlz_lib::InitializeTempHivesForTesting(hklm, hkcu);
+
+  // Its important to override HKLM before HKCU because of the registry
+  // initialization performed above.
+  override_manager_.OverrideRegistry(HKEY_LOCAL_MACHINE, kRlzTempHklm);
+  override_manager_.OverrideRegistry(HKEY_CURRENT_USER, kRlzTempHkcu);
+
+  // Make sure a non-organic brand code is set in the registry or the RLZTracker
+  // is pretty much a no-op.
+  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
+  std::wstring reg_path = dist->GetStateKey();
+  RegKey key(HKEY_CURRENT_USER, reg_path.c_str(), KEY_SET_VALUE);
+  ASSERT_EQ(ERROR_SUCCESS, key.WriteValue(google_update::kRegRLZBrandField,
+                                          L"TEST"));
+}
+
+void RlzLibTest::TearDown() {
+  TestingBrowserProcessTest::TearDown();
+

[cpu_(ooo_6.6-7.5), 2011/08/26 21:37:51]

so we don't delete the registry keys?

[Roger Tawa OOO till Jul 10th, 2011/08/27 02:00:06]

No need, done by the dtor of RegistryOverrideManager.

+  if (env_var_[0] != 0)
+    ::SetEnvironmentVariable(ASCIIToWide(env_vars::kHeadless).c_str(),
+                             env_var_);
+}
+
+void RlzLibTest::SimulateOmniboxUsage() {
+  tracker_.Observe(chrome::NOTIFICATION_OMNIBOX_OPENED_URL,
+                   NotificationService::AllSources(),
+                   Details<AutocompleteLog>(NULL));
+}
+
+void RlzLibTest::SimulateHomepageUsage() {
+  NavigationEntry entry(NULL, 0, GURL(), GURL(), string16(),
+                        TestRLZTracker::RLZ_PAGETRANSITION_HOME_PAGE);
+  tracker_.Observe(content::NOTIFICATION_NAV_ENTRY_PENDING,
+                   NotificationService::AllSources(),
+                   Details<NavigationEntry>(&entry));
+}
+
+void RlzLibTest::InvokeDelayedInit() {
+  tracker_.DelayedInit();
+}
+
+void RlzLibTest::ExpectEventRecorded(const char* event_name, bool expected) {
+  char cgi[rlz_lib::kMaxCgiLength];
+  GetProductEventsAsCgi(rlz_lib::CHROME, cgi, arraysize(cgi));
+  if (expected) {
+    EXPECT_STR_CONTAINS(cgi, event_name);
+  } else {
+    EXPECT_STR_NOT_CONTAIN(cgi, event_name);
+  }
+}
+
+void RlzLibTest::ExpectRlzPingSent(bool expected) {
+  EXPECT_EQ(expected, tracker_.pingnow_called());
+}
+
+TEST_F(RlzLibTest, RecordProductEvent) {
+  RLZTracker::RecordProductEvent(rlz_lib::CHROME, rlz_lib::CHROME_OMNIBOX,
+    rlz_lib::FIRST_SEARCH);
+
+  ExpectEventRecorded("C1F", true);
+}
+
+// The events that affect the different RLZ scenarios are the following:
+//
+//  A: the user starts chrome for the first time
+//  B: the user stops chrome
+//  C: the user start a subsequent time
+//  D: the user stops chrome again
+//  I: the RLZTracker::DelayedInit() method is invoked
+//  X: the user performs a search using the omnibox
+//  Y: the user performs a search using the home page
+//
+// The events A to D happen in chronological order, but the other events
+// may happen at any point between A-B or C-D, in no particular order.
+//
+// The visible results of the scenarios are:
+//
+//  C1I event is recorded
+//  C2I event is recorded
+//  C1F event is recorded
+//  C2F event is recorded
+//  C1S event is recorded
+//  C2S event is recorded
+//  RLZ ping sent
+//
+// Variations on the above scenarios:
+//
+//  - if the delay specified to InitRlzDelayed() is negative, then the RLZ
+//    ping should be sent out at the time of event X and not wait for I
+//
+// Also want to test that pre-warming the RLZ string cache works correctly.
+
+TEST_F(RlzLibTest, QuickStopAfterStart) {
+  RLZTracker::InitRlzDelayed(true, 20, true, true);
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", false);
+  ExpectEventRecorded("C1S", false);
+  ExpectEventRecorded("C1F", false);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", false);
+  ExpectEventRecorded("C2S", false);
+  ExpectEventRecorded("C2F", false);
+
+  ExpectRlzPingSent(false);
+}
+
+TEST_F(RlzLibTest, DelayedInitOnly) {
+  RLZTracker::InitRlzDelayed(true, 20, true, true);
+  InvokeDelayedInit();
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", true);
+  ExpectEventRecorded("C1S", true);
+  ExpectEventRecorded("C1F", false);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", true);
+  ExpectEventRecorded("C2S", true);
+  ExpectEventRecorded("C2F", false);
+
+  ExpectRlzPingSent(true);
+}
+
+TEST_F(RlzLibTest, DelayedInitOnlyNoFirstRunNoRlzStrings) {
+  RLZTracker::InitRlzDelayed(false, 20, true, true);
+  InvokeDelayedInit();
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", true);
+  ExpectEventRecorded("C1S", true);
+  ExpectEventRecorded("C1F", false);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", true);
+  ExpectEventRecorded("C2S", true);
+  ExpectEventRecorded("C2F", false);
+
+  ExpectRlzPingSent(true);
+}
+
+TEST_F(RlzLibTest, DelayedInitOnlyNoFirstRun) {
+  // Set some dummy RLZ strings to simulate that we already ran before and
+  // performed a successful ping to the RLZ server.
+  rlz_lib::SetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, kOmniboxRlzString);
+  rlz_lib::SetAccessPointRlz(rlz_lib::CHROME_HOME_PAGE, kHomepageRlzString);
+
+  RLZTracker::InitRlzDelayed(false, 20, true, true);
+  InvokeDelayedInit();
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", true);
+  ExpectEventRecorded("C1S", false);
+  ExpectEventRecorded("C1F", false);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", true);
+  ExpectEventRecorded("C2S", false);
+  ExpectEventRecorded("C2F", false);
+
+  ExpectRlzPingSent(true);
+}
+
+TEST_F(RlzLibTest, DelayedInitOnlyNoGoogleDefaultSearchOrHomepage) {
+  RLZTracker::InitRlzDelayed(true, 20, false, false);
+  InvokeDelayedInit();
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", true);
+  ExpectEventRecorded("C1S", false);
+  ExpectEventRecorded("C1F", false);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", true);
+  ExpectEventRecorded("C2S", false);
+  ExpectEventRecorded("C2F", false);
+
+  ExpectRlzPingSent(true);
+}
+
+TEST_F(RlzLibTest, OmniboxUsageOnly) {
+  RLZTracker::InitRlzDelayed(true, 20, true, true);
+  SimulateOmniboxUsage();
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", false);
+  ExpectEventRecorded("C1S", false);
+  ExpectEventRecorded("C1F", true);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", false);
+  ExpectEventRecorded("C2S", false);
+  ExpectEventRecorded("C2F", false);
+
+  ExpectRlzPingSent(false);
+}
+
+TEST_F(RlzLibTest, HomepageUsageOnly) {
+  RLZTracker::InitRlzDelayed(true, 20, true, true);
+  SimulateHomepageUsage();
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", false);
+  ExpectEventRecorded("C1S", false);
+  ExpectEventRecorded("C1F", false);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", false);
+  ExpectEventRecorded("C2S", false);
+  ExpectEventRecorded("C2F", true);
+
+  ExpectRlzPingSent(false);
+}
+
+TEST_F(RlzLibTest, UsageBeforeDelayedInit) {
+  RLZTracker::InitRlzDelayed(true, 20, true, true);
+  SimulateOmniboxUsage();
+  SimulateHomepageUsage();
+  InvokeDelayedInit();
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", true);
+  ExpectEventRecorded("C1S", true);
+  ExpectEventRecorded("C1F", true);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", true);
+  ExpectEventRecorded("C2S", true);
+  ExpectEventRecorded("C2F", true);
+
+  ExpectRlzPingSent(true);
+}
+
+TEST_F(RlzLibTest, OmniboxUsageAfterDelayedInit) {
+  RLZTracker::InitRlzDelayed(true, 20, true, true);
+  InvokeDelayedInit();
+  SimulateOmniboxUsage();
+  SimulateHomepageUsage();
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", true);
+  ExpectEventRecorded("C1S", true);
+  ExpectEventRecorded("C1F", true);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", true);
+  ExpectEventRecorded("C2S", true);
+  ExpectEventRecorded("C2F", true);
+
+  ExpectRlzPingSent(true);
+}
+
+TEST_F(RlzLibTest, OmniboxUsageSendsPingWhenDelayNegative) {
+  RLZTracker::InitRlzDelayed(true, -20, true, true);
+  SimulateOmniboxUsage();
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", true);
+  ExpectEventRecorded("C1S", true);
+  ExpectEventRecorded("C1F", true);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", true);
+  ExpectEventRecorded("C2S", true);
+  ExpectEventRecorded("C2F", false);
+
+  ExpectRlzPingSent(true);
+}
+
+TEST_F(RlzLibTest, HomepageUsageDoesNotSendPingWhenDelayNegative) {
+  RLZTracker::InitRlzDelayed(true, -20, true, true);
+  SimulateHomepageUsage();
+
+  // Omnibox events.
+  ExpectEventRecorded("C1I", false);
+  ExpectEventRecorded("C1S", false);
+  ExpectEventRecorded("C1F", false);
+
+  // Home page events.
+  ExpectEventRecorded("C2I", false);
+  ExpectEventRecorded("C2S", false);
+  ExpectEventRecorded("C2F", true);
+
+  ExpectRlzPingSent(false);
+}
+
+TEST_F(RlzLibTest, GetAccessPointRlzOnIoThread) {
+  // Set dummy RLZ string.
+  rlz_lib::SetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, kOmniboxRlzString);
+
+  std::wstring rlz;
+
+  tracker_.set_assume_io_thread(true);
+  EXPECT_TRUE(RLZTracker::GetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, &rlz));
+  EXPECT_STREQ(kOmniboxRlzString, WideToUTF8(rlz).c_str());
+}
+
+TEST_F(RlzLibTest, GetAccessPointRlzNotOnIoThread) {
+  // Set dummy RLZ string.
+  rlz_lib::SetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, kOmniboxRlzString);
+
+  std::wstring rlz;
+
+  tracker_.set_assume_io_thread(false);
+  EXPECT_FALSE(RLZTracker::GetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, &rlz));
+}
+
+TEST_F(RlzLibTest, GetAccessPointRlzIsCached) {
+  // Set dummy RLZ string.
+  rlz_lib::SetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, kOmniboxRlzString);
+
+  std::wstring rlz;
+
+  tracker_.set_assume_io_thread(false);
+  EXPECT_FALSE(RLZTracker::GetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, &rlz));
+
+  tracker_.set_assume_io_thread(true);
+  EXPECT_TRUE(RLZTracker::GetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, &rlz));
+  EXPECT_STREQ(kOmniboxRlzString, WideToUTF8(rlz).c_str());
+
+  tracker_.set_assume_io_thread(false);
+  EXPECT_TRUE(RLZTracker::GetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, &rlz));
+  EXPECT_STREQ(kOmniboxRlzString, WideToUTF8(rlz).c_str());
+}
+
+TEST_F(RlzLibTest, PingInvalidatesRlzCache) {
+  // Set dummy RLZ string.
+  rlz_lib::SetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, kOmniboxRlzString);
+
+  std::wstring rlz;
+
+  // Prime the cache.
+  tracker_.set_assume_io_thread(true);
+  EXPECT_TRUE(RLZTracker::GetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, &rlz));
+  EXPECT_STREQ(kOmniboxRlzString, WideToUTF8(rlz).c_str());
+
+  // Make sure cache is valid.
+  tracker_.set_assume_io_thread(false);
+  EXPECT_TRUE(RLZTracker::GetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, &rlz));
+  EXPECT_STREQ(kOmniboxRlzString, WideToUTF8(rlz).c_str());
+
+  // Perform ping.
+  RLZTracker::InitRlzDelayed(true, 20, true, true);
+  InvokeDelayedInit();
+  ExpectRlzPingSent(true);
+
+  // Make sure cache is now invalid.
+  EXPECT_FALSE(RLZTracker::GetAccessPointRlz(rlz_lib::CHROME_OMNIBOX, &rlz));
+}
+
+TEST_F(RlzLibTest, ObserveHandlesBadArgs) {
+  NavigationEntry entry(NULL, 0, GURL(), GURL(), string16(),
+                        PageTransition::LINK);
+  tracker_.Observe(content::NOTIFICATION_NAV_ENTRY_PENDING,
+                   NotificationService::AllSources(),
+                   Details<NavigationEntry>(NULL));
+  tracker_.Observe(content::NOTIFICATION_NAV_ENTRY_PENDING,
+                   NotificationService::AllSources(),
+                   Details<NavigationEntry>(&entry));
+}