Added the AutomaticProfileResetter service.

chrome/browser/profile_resetter/automatic_profile_resetter_unittest.cc

+// Copyright 2013 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 <string>
+
+#include "base/basictypes.h"
+#include "base/bind_helpers.h"
+#include "base/metrics/field_trial.h"
+#include "base/run_loop.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "chrome/browser/profile_resetter/automatic_profile_resetter.h"
+#include "chrome/browser/profile_resetter/automatic_profile_resetter_factory.h"
+#include "chrome/browser/profile_resetter/automatic_profile_resetter_mementos.h"
+#include "chrome/browser/profile_resetter/jtl_foundation.h"
+#include "chrome/browser/profile_resetter/jtl_instructions.h"
+#include "chrome/test/base/scoped_testing_local_state.h"
+#include "chrome/test/base/testing_browser_process.h"
+#include "chrome/test/base/testing_profile.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+const char kAutomaticProfileResetStudyName[] = "AutomaticProfileReset";
+const char kStudyDisabledGroupName[] = "Disabled";
+const char kStudyDryRunGroupName[] = "DryRun";
+const char kStudyEnabledGroupName[] = "Enabled";
+
+const char kTestHashSeed[] = "testing-hash-seed";
+const char kTestMementoValue[] = "01234567890123456789012345678901";
+const char kTestInvalidMementoValue[] = "12345678901234567890123456789012";
+
+// Helpers ------------------------------------------------------------------
+
+class MockProfileResetterDelegate : public AutomaticProfileResetterDelegate {
+ public:
+  MockProfileResetterDelegate() {}
+  virtual ~MockProfileResetterDelegate() {}
+
+  MOCK_METHOD0(ShowPrompt, void());
+  MOCK_METHOD2(ReportStatistics, void(uint32, uint32));
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockProfileResetterDelegate);
+};
+
+class FileHostedPromptMementoSynchronous : protected FileHostedPromptMemento {
+ public:
+  explicit FileHostedPromptMementoSynchronous(Profile* profile)
+      : FileHostedPromptMemento(profile) {}
+
+  std::string ReadValue() const {
+    std::string result;
+    FileHostedPromptMemento::ReadValue(base::Bind(&AssignArgumentTo, &result));
+    base::RunLoop().RunUntilIdle();
+    return result;
+  }
+
+  void StoreValue(const std::string& value) {
+    FileHostedPromptMemento::StoreValue(value);
+    base::RunLoop().RunUntilIdle();
+  }
+
+ private:
+  static void AssignArgumentTo(std::string* target, const std::string& value) {
+    *target = value;
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(FileHostedPromptMementoSynchronous);
+};
+
+std::string GetHash(const std::string& input) {
+  return jtl_foundation::Hasher(kTestHashSeed).GetHash(input);
+}
+
+// Encodes a Boolean argument value into JTL bytecode.
+std::string EncodeBool(bool value) { return value ? VALUE_TRUE : VALUE_FALSE; }
+
+// Constructs a simple evaluation program to test that input/output works well.
+// It will emulate a scenario in which the reset criteria are satisfied as
+// prescribed by |emulate_satisfied_criterion_{1|2}|, and will set bits in the
+// combined status mask according to whether or not the memento values received
+// in the input were as expected.
+//
+// More specifically, the output of the program will be as follows:
+// {
+//   "satisfied_criteria_mask_bit1": emulate_satisfied_criterion_1,
+//   "satisfied_criteria_mask_bit2": emulate_satisfied_criterion_2,
+//   "combined_status_mask_bit1":
+//      (emulate_satisfied_criterion_1 || emulate_satisfied_criterion_2),
+//   "combined_status_mask_bit2":
+//      (input["memento_value_in_prefs"] == kTestMementoValue),
+//   "combined_status_mask_bit3":
+//      (input["memento_value_in_local_state"] == kTestMementoValue),
+//   "combined_status_mask_bit4":
+//      (input["memento_value_in_file"] == kTestMementoValue),
+//   "had_prompted_already": <OR-combination of above three>,
+//   "memento_value_in_prefs": kTestMementoValue,
+//   "memento_value_in_local_state": kTestMementoValue,
+//   "memento_value_in_file": kTestMementoValue
+// }
+std::string ConstructProgram(bool emulate_satisfied_criterion_1,
+                             bool emulate_satisfied_criterion_2) {
+  std::string bytecode;
+  bytecode += OP_STORE_BOOL(GetHash("satisfied_criteria_mask_bit1"),
+                            EncodeBool(emulate_satisfied_criterion_1));
+  bytecode += OP_END_OF_SENTENCE;
+  bytecode += OP_STORE_BOOL(GetHash("satisfied_criteria_mask_bit2"),
+                            EncodeBool(emulate_satisfied_criterion_2));
+  bytecode += OP_END_OF_SENTENCE;
+  bytecode += OP_STORE_BOOL(GetHash("combined_status_mask_bit1"),
+                            EncodeBool(emulate_satisfied_criterion_1 ||
+                                       emulate_satisfied_criterion_2));
+  bytecode += OP_END_OF_SENTENCE;
+  bytecode += OP_NAVIGATE(GetHash("memento_value_in_prefs"));
+  bytecode += OP_COMPARE_NODE_HASH(GetHash(kTestMementoValue));
+  bytecode += OP_STORE_BOOL(GetHash("combined_status_mask_bit2"), VALUE_TRUE);
+  bytecode += OP_STORE_BOOL(GetHash("had_prompted_already"), VALUE_TRUE);
+  bytecode += OP_END_OF_SENTENCE;
+  bytecode += OP_NAVIGATE(GetHash("memento_value_in_local_state"));
+  bytecode += OP_COMPARE_NODE_HASH(GetHash(kTestMementoValue));
+  bytecode += OP_STORE_BOOL(GetHash("combined_status_mask_bit3"), VALUE_TRUE);
+  bytecode += OP_STORE_BOOL(GetHash("had_prompted_already"), VALUE_TRUE);
+  bytecode += OP_END_OF_SENTENCE;
+  bytecode += OP_NAVIGATE(GetHash("memento_value_in_file"));
+  bytecode += OP_COMPARE_NODE_HASH(GetHash(kTestMementoValue));
+  bytecode += OP_STORE_BOOL(GetHash("combined_status_mask_bit4"), VALUE_TRUE);
+  bytecode += OP_STORE_BOOL(GetHash("had_prompted_already"), VALUE_TRUE);
+  bytecode += OP_END_OF_SENTENCE;
+  bytecode += OP_STORE_HASH(GetHash("memento_value_in_prefs"),
+                            kTestMementoValue);
+  bytecode += OP_END_OF_SENTENCE;
+  bytecode += OP_STORE_HASH(GetHash("memento_value_in_local_state"),
+                            kTestMementoValue);
+  bytecode += OP_END_OF_SENTENCE;
+  bytecode += OP_STORE_HASH(GetHash("memento_value_in_file"),
+                            kTestMementoValue);
+  bytecode += OP_END_OF_SENTENCE;
+  return bytecode;
+}
+
+// Test fixtures -------------------------------------------------------------
+
+class AutomaticProfileResetterTestBase : public testing::Test {
+ protected:
+  explicit AutomaticProfileResetterTestBase(
+      const std::string& experiment_group_name)
+      : local_state_(TestingBrowserProcess::GetGlobal()),
+        experiment_group_name_(experiment_group_name),
+        mock_delegate_(NULL) {
+    // Make sure the factory is not optimized away, so prefs get registered.
+    AutomaticProfileResetterFactory::GetInstance();
+  }
+
+  virtual void SetUp() OVERRIDE {
+    profile_.reset(new TestingProfile());
+    field_trials_.reset(new base::FieldTrialList(NULL));
+    base::FieldTrialList::CreateFieldTrial(kAutomaticProfileResetStudyName,
+                                           experiment_group_name_);
+    mock_delegate_ = new testing::StrictMock<MockProfileResetterDelegate>();
+    resetter_.reset(new AutomaticProfileResetter(profile_.get()));
+  }
+
+  void SetTestingHashSeed(const std::string& hash_seed) {
+    testing_hash_seed_ = hash_seed;
+  }
+
+  void SetTestingProgram(const std::string& source_code) {
+    testing_program_ = source_code;
+  }
+
+  void UnleashResetterAndWait() {
+    resetter_->Initialize();
+    resetter_->SetDelegateForTesting(mock_delegate_);  // Takes ownership.
+    resetter_->SetHashSeedForTesting(testing_hash_seed_);
+    resetter_->SetProgramForTesting(testing_program_);
+    base::RunLoop().RunUntilIdle();
+    content::BrowserThread::GetBlockingPool()->FlushForTesting();
+    base::RunLoop().RunUntilIdle();
+  }
+
+  TestingProfile* profile() { return profile_.get(); }
+
+  MockProfileResetterDelegate& mock_delegate() { return *mock_delegate_; }
+  AutomaticProfileResetter* resetter() { return resetter_.get(); }
+
+ private:
+  content::TestBrowserThreadBundle thread_bundle_;
+  ScopedTestingLocalState local_state_;
+  scoped_ptr<TestingProfile> profile_;
+  scoped_ptr<base::FieldTrialList> field_trials_;
+  std::string experiment_group_name_;
+  std::string testing_program_;
+  std::string testing_hash_seed_;
+
+  scoped_ptr<AutomaticProfileResetter> resetter_;
+  MockProfileResetterDelegate* mock_delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(AutomaticProfileResetterTestBase);
+};
+
+class AutomaticProfileResetterTest : public AutomaticProfileResetterTestBase {
+ protected:
+  AutomaticProfileResetterTest()
+      : AutomaticProfileResetterTestBase(kStudyEnabledGroupName) {}
+};
+
+class AutomaticProfileResetterTestDryRun
+    : public AutomaticProfileResetterTestBase {
+ protected:
+  AutomaticProfileResetterTestDryRun()
+      : AutomaticProfileResetterTestBase(kStudyDryRunGroupName) {}
+};
+
+class AutomaticProfileResetterTestDisabled
+    : public AutomaticProfileResetterTestBase {
+ protected:
+  AutomaticProfileResetterTestDisabled()
+      : AutomaticProfileResetterTestBase(kStudyDisabledGroupName) {}
+};
+
+// Tests ---------------------------------------------------------------------
+
+TEST_F(AutomaticProfileResetterTestDisabled, NothingIsDoneWhenDisabled) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+
+  SetTestingProgram(ConstructProgram(true, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  // No calls are expected to the delegate.
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTestDryRun, ConditionsNotSatisfied) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+
+  SetTestingProgram(ConstructProgram(false, false));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x00u, 0x00u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTestDryRun, OneConditionSatisfied) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+
+  SetTestingProgram(ConstructProgram(true, false));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x01u, 0x01u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ(kTestMementoValue, memento_in_prefs.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_local_state.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTestDryRun, OtherConditionSatisfied) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+
+  SetTestingProgram(ConstructProgram(false, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x02u, 0x01u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ(kTestMementoValue, memento_in_prefs.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_local_state.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTestDryRun,
+       ConditionsSatisfiedAndInvalidMementos) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  memento_in_prefs.StoreValue(kTestInvalidMementoValue);
+  memento_in_local_state.StoreValue(kTestInvalidMementoValue);
+  memento_in_file.StoreValue(kTestInvalidMementoValue);
+
+  SetTestingProgram(ConstructProgram(true, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x03u, 0x01u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ(kTestMementoValue, memento_in_prefs.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_local_state.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTestDryRun, AlreadyHadPrefHostedMemento) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  memento_in_prefs.StoreValue(kTestMementoValue);
+
+  SetTestingProgram(ConstructProgram(true, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x03u, 0x03u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ(kTestMementoValue, memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTestDryRun, AlreadyHadLocalStateHostedMemento) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  memento_in_local_state.StoreValue(kTestMementoValue);
+
+  SetTestingProgram(ConstructProgram(true, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x03u, 0x05u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTestDryRun, AlreadyHadFileHostedMemento) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  memento_in_file.StoreValue(kTestMementoValue);
+
+  SetTestingProgram(ConstructProgram(true, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x03u, 0x09u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTestDryRun, DoNothingWhenResourcesAreMissing) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  SetTestingProgram("");
+  SetTestingHashSeed("");
+
+  // No calls are expected to the delegate.
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTest, ConditionsNotSatisfied) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+
+  SetTestingProgram(ConstructProgram(false, false));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x00u, 0x00u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTest, OneConditionSatisfied) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+
+  SetTestingProgram(ConstructProgram(true, false));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ShowPrompt());
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x01u, 0x01u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ(kTestMementoValue, memento_in_prefs.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_local_state.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTest, OtherConditionSatisfied) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+
+  SetTestingProgram(ConstructProgram(false, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ShowPrompt());
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x02u, 0x01u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ(kTestMementoValue, memento_in_prefs.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_local_state.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTest, ConditionsSatisfiedAndInvalidMementos) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  memento_in_prefs.StoreValue(kTestInvalidMementoValue);
+  memento_in_local_state.StoreValue(kTestInvalidMementoValue);
+  memento_in_file.StoreValue(kTestInvalidMementoValue);
+
+  SetTestingProgram(ConstructProgram(true, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ShowPrompt());
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x03u, 0x01u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ(kTestMementoValue, memento_in_prefs.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_local_state.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTest, PrefHostedMementoPreventsPrompt) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  memento_in_prefs.StoreValue(kTestMementoValue);
+
+  SetTestingProgram(ConstructProgram(true, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x03u, 0x03u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ(kTestMementoValue, memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTest, LocalStateHostedMementoPreventsPrompt) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  memento_in_local_state.StoreValue(kTestMementoValue);
+
+  SetTestingProgram(ConstructProgram(true, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x03u, 0x05u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTest, FileHostedMementoPreventsPrompt) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  memento_in_file.StoreValue(kTestMementoValue);
+
+  SetTestingProgram(ConstructProgram(true, true));
+  SetTestingHashSeed(kTestHashSeed);
+
+  EXPECT_CALL(mock_delegate(), ReportStatistics(0x03u, 0x09u));
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ(kTestMementoValue, memento_in_file.ReadValue());
+}
+
+TEST_F(AutomaticProfileResetterTest, DoNothingWhenResourcesAreMissing) {
+  PreferenceHostedPromptMemento memento_in_prefs(profile());
+  LocalStateHostedPromptMemento memento_in_local_state(profile());
+  FileHostedPromptMementoSynchronous memento_in_file(profile());
+
+  SetTestingProgram("");
+  SetTestingHashSeed("");
+
+  // No calls are expected to the delegate.
+
+  UnleashResetterAndWait();
+
+  EXPECT_EQ("", memento_in_prefs.ReadValue());
+  EXPECT_EQ("", memento_in_local_state.ReadValue());
+  EXPECT_EQ("", memento_in_file.ReadValue());
+}
+
+}  // namespace