[Offline Pages] Updated clearing logic in storage manager.

components/offline_pages/offline_page_storage_manager_unittest.cc

Index: components/offline_pages/offline_page_storage_manager_unittest.cc
diff --git a/components/offline_pages/offline_page_storage_manager_unittest.cc b/components/offline_pages/offline_page_storage_manager_unittest.cc
index 3f4890c4bf8f88b5068e89571b094a4ea998f3ff..ba8abdde42d65b65a4bb98c58e396fdaf10bd569 100644
--- a/components/offline_pages/offline_page_storage_manager_unittest.cc
+++ b/components/offline_pages/offline_page_storage_manager_unittest.cc
@@ -14,20 +14,27 @@
 #include "components/offline_pages/offline_page_item.h"
 #include "components/offline_pages/offline_page_storage_manager.h"
 #include "components/offline_pages/offline_page_types.h"
+#include "components/prefs/pref_registry_simple.h"
+#include "components/prefs/pref_service.h"
+#include "components/prefs/testing_pref_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using StorageClearResult =
+    offline_pages::OfflinePageStorageManager::StorageClearResult;
+using LifetimePolicy = offline_pages::LifetimePolicy;
+
 namespace offline_pages {
 
 namespace {
 const char kBookmarkNamespace[] = "bookmark";
 const char kLastNNamespace[] = "last_n";
 const GURL kTestUrl("http://example.com");
-const base::FilePath::CharType kFilePath[] = FILE_PATH_LITERAL("TEST_FILEPATH");
-const int64_t kTestFileSize = 876543LL;
+const base::FilePath::CharType kFilePath[] = FILE_PATH_LITERAL("/data");
+const int64_t kTestFileSize = 87654LL;
 
 enum TestOptions {
   DEFAULT = 1 << 0,
-  DELETE_FAILED = 1 << 1,
+  DELETE_FAIL = 1 << 1,
 };
 
 struct PageSettings {
@@ -55,18 +62,12 @@ class StorageManagerTestClient : public OfflinePageStorageManager::Client {
   }
 
   void DeletePagesByOfflineId(const std::vector<int64_t>& offline_ids,
-                              const DeletePageCallback& callback) override {
-    if (options_ & TestOptions::DELETE_FAILED) {
-      callback.Run(DeletePageResult::STORE_FAILURE);
-    } else {
-      callback.Run(DeletePageResult::SUCCESS);
-    }
-  }
+                              const DeletePageCallback& callback) override;
+  void AddPages(const PageSettings& setting);
 
   base::SimpleTestClock* clock() { return clock_; }
 
  private:
-  void AddPages(const PageSettings& setting);
 
   std::vector<OfflinePageItem> pages_;
 
@@ -78,6 +79,21 @@ class StorageManagerTestClient : public OfflinePageStorageManager::Client {
 
   int64_t next_offline_id_;
 };
+void StorageManagerTestClient::DeletePagesByOfflineId(
+    const std::vector<int64_t>& offline_ids,
+    const DeletePageCallback& callback) {
+  if (options_ & TestOptions::DELETE_FAIL) {
+    callback.Run(DeletePageResult::STORE_FAILURE);
+  } else {
+    std::set<int64_t> s(offline_ids.begin(), offline_ids.end());
+    pages_.erase(std::remove_if(pages_.begin(), pages_.end(),
+                                [&s](const OfflinePageItem& page) -> bool {
+                                  return s.count(page.offline_id) != 0;
+                                }),
+                 pages_.end());
+    callback.Run(DeletePageResult::SUCCESS);
+  }
+}
 
 void StorageManagerTestClient::AddPages(const PageSettings& setting) {
   std::string name_space = setting.name_space;
@@ -116,7 +132,8 @@ class OfflinePageStorageManagerTest : public testing::Test {
   ClientPolicyController* policy_controller() {
     return policy_controller_.get();
   }
-  void OnPagesCleared(int pages_cleared_count, DeletePageResult result);
+  PrefService* prefs() { return prefs_.get(); }
+  void OnPagesCleared(int pages_cleared_count, StorageClearResult result);
   void Initialize(const std::vector<PageSettings>& settings,
                   TestOptions options = TestOptions::DEFAULT);
 
@@ -125,25 +142,29 @@ class OfflinePageStorageManagerTest : public testing::Test {
 
   base::SimpleTestClock* clock() { return clock_; }
   int last_cleared_page_count() const { return last_cleared_page_count_; }
-  DeletePageResult last_delete_page_result() const {
-    return last_delete_page_result_;
+  int total_cleared_times() const { return total_cleared_times_; }
+  StorageClearResult last_storage_clear_result() const {
+    return last_storage_clear_result_;
   }
 
  private:
   std::unique_ptr<OfflinePageStorageManager> manager_;
   std::unique_ptr<OfflinePageStorageManager::Client> client_;
   std::unique_ptr<ClientPolicyController> policy_controller_;
+  std::unique_ptr<PrefService> prefs_;
 
   base::SimpleTestClock* clock_;
 
   int last_cleared_page_count_;
-  DeletePageResult last_delete_page_result_;
+  int total_cleared_times_;
+  StorageClearResult last_storage_clear_result_;
 };
 
 OfflinePageStorageManagerTest::OfflinePageStorageManagerTest()
     : policy_controller_(new ClientPolicyController()),
       last_cleared_page_count_(0),
-      last_delete_page_result_(DeletePageResult::SUCCESS) {}
+      total_cleared_times_(0),
+      last_storage_clear_result_(StorageClearResult::SUCCESS) {}
 
 void OfflinePageStorageManagerTest::Initialize(
     const std::vector<PageSettings>& page_settings,
@@ -151,8 +172,13 @@ void OfflinePageStorageManagerTest::Initialize(
   std::unique_ptr<base::SimpleTestClock> clock(new base::SimpleTestClock());
   clock_ = clock.get();
   clock_->SetNow(base::Time::Now());
+  std::unique_ptr<TestingPrefServiceSimple> prefs(
+      new TestingPrefServiceSimple());
+  prefs->registry()->RegisterInt64Pref(kOfflinePageStorageLastClearedTime, 0);
+  prefs_ = std::move(prefs);
   client_.reset(new StorageManagerTestClient(page_settings, clock_, options));
-  manager_.reset(new OfflinePageStorageManager(client(), policy_controller()));
+  manager_.reset(new OfflinePageStorageManager(client(), policy_controller(),
+                                               prefs_.get()));
   manager_->SetClockForTesting(std::move(clock));
 }
 
@@ -162,9 +188,10 @@ void OfflinePageStorageManagerTest::TearDown() {
 }
 
 void OfflinePageStorageManagerTest::OnPagesCleared(int pages_cleared_count,
-                                                   DeletePageResult result) {
+                                                   StorageClearResult result) {
   last_cleared_page_count_ = pages_cleared_count;
-  last_delete_page_result_ = result;
+  total_cleared_times_++;
+  last_storage_clear_result_ = result;
 }
 
 TEST_F(OfflinePageStorageManagerTest, TestClearPagesLessThanLimit) {
@@ -174,7 +201,8 @@ TEST_F(OfflinePageStorageManagerTest, TestClearPagesLessThanLimit) {
   manager()->ClearPagesIfNeeded(base::Bind(
       &OfflinePageStorageManagerTest::OnPagesCleared, base::Unretained(this)));
   EXPECT_EQ(2, last_cleared_page_count());
-  EXPECT_EQ(DeletePageResult::SUCCESS, last_delete_page_result());
+  EXPECT_EQ(1, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::SUCCESS, last_storage_clear_result());
 }
 
 TEST_F(OfflinePageStorageManagerTest, TestClearPagesMoreThanLimit) {
@@ -184,7 +212,8 @@ TEST_F(OfflinePageStorageManagerTest, TestClearPagesMoreThanLimit) {
   manager()->ClearPagesIfNeeded(base::Bind(
       &OfflinePageStorageManagerTest::OnPagesCleared, base::Unretained(this)));
   EXPECT_EQ(45, last_cleared_page_count());
-  EXPECT_EQ(DeletePageResult::SUCCESS, last_delete_page_result());
+  EXPECT_EQ(1, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::SUCCESS, last_storage_clear_result());
 }
 
 TEST_F(OfflinePageStorageManagerTest, TestClearPagesMoreFreshPages) {
@@ -197,6 +226,86 @@ TEST_F(OfflinePageStorageManagerTest, TestClearPagesMoreFreshPages) {
                               ->GetPolicy(kLastNNamespace)
                               .lifetime_policy.page_limit;
   EXPECT_EQ(1 + (100 - last_n_page_limit), last_cleared_page_count());
-  EXPECT_EQ(DeletePageResult::SUCCESS, last_delete_page_result());
+  EXPECT_EQ(1, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::SUCCESS, last_storage_clear_result());
+}
+
+TEST_F(OfflinePageStorageManagerTest, TestDeletionFailed) {
+  Initialize(std::vector<PageSettings>(
+                 {{kBookmarkNamespace, 10, 10}, {kLastNNamespace, 10, 10}}),
+             TestOptions::DELETE_FAIL);
+  manager()->ClearPagesIfNeeded(base::Bind(
+      &OfflinePageStorageManagerTest::OnPagesCleared, base::Unretained(this)));
+  EXPECT_EQ(20, last_cleared_page_count());
+  EXPECT_EQ(1, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::DELETE_FAIL, last_storage_clear_result());
+}
+
+TEST_F(OfflinePageStorageManagerTest, TestStorageTimeGap) {
+  Initialize(std::vector<PageSettings>(
+      {{kBookmarkNamespace, 10, 10}, {kLastNNamespace, 10, 10}}));
+  clock()->Advance(base::TimeDelta::FromMinutes(30));
+  manager()->ClearPagesIfNeeded(base::Bind(
+      &OfflinePageStorageManagerTest::OnPagesCleared, base::Unretained(this)));
+  EXPECT_EQ(20, last_cleared_page_count());
+  EXPECT_EQ(1, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::SUCCESS, last_storage_clear_result());
+
+  // Advance clock so we go over the gap, but no expired pages.
+  clock()->Advance(kClearStorageTimeGap + base::TimeDelta::FromHours(1));
+  manager()->ClearPagesIfNeeded(base::Bind(
+      &OfflinePageStorageManagerTest::OnPagesCleared, base::Unretained(this)));
+  EXPECT_EQ(0, last_cleared_page_count());
+  EXPECT_EQ(2, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::SUCCESS, last_storage_clear_result());
+
+  // Advance clock so we are still in the gap, should be unnecessary.
+  clock()->Advance(kClearStorageTimeGap - base::TimeDelta::FromHours(1));
+  manager()->ClearPagesIfNeeded(base::Bind(
+      &OfflinePageStorageManagerTest::OnPagesCleared, base::Unretained(this)));
+  EXPECT_EQ(0, last_cleared_page_count());
+  EXPECT_EQ(3, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::UNNECESSARY, last_storage_clear_result());
+}
+
+TEST_F(OfflinePageStorageManagerTest, TestClearMultipleTimes) {
+  Initialize(std::vector<PageSettings>(
+      {{kBookmarkNamespace, 30, 0}, {kLastNNamespace, 100, 1}}));
+  clock()->Advance(base::TimeDelta::FromMinutes(30));
+  LifetimePolicy policy =
+      policy_controller()->GetPolicy(kLastNNamespace).lifetime_policy;
+  int last_n_page_limit = policy.page_limit;
+
+  manager()->ClearPagesIfNeeded(base::Bind(
+      &OfflinePageStorageManagerTest::OnPagesCleared, base::Unretained(this)));
+  EXPECT_EQ(1 + (100 - last_n_page_limit), last_cleared_page_count());
+  EXPECT_EQ(1, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::SUCCESS, last_storage_clear_result());
+
+  // Advance the clock by expiration period of last_n namespace, should be
+  // deleting all pages left in the namespace.
+  clock()->Advance(policy.expiration_period);
+  manager()->ClearPagesIfNeeded(base::Bind(
+      &OfflinePageStorageManagerTest::OnPagesCleared, base::Unretained(this)));
+  EXPECT_EQ(last_n_page_limit, last_cleared_page_count());
+  EXPECT_EQ(2, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::SUCCESS, last_storage_clear_result());
+
+  // Only 1 ms passes and no changes in pages, so no need to clear page.
+  clock()->Advance(base::TimeDelta::FromMilliseconds(1));
+  manager()->ClearPagesIfNeeded(base::Bind(
+      &OfflinePageStorageManagerTest::OnPagesCleared, base::Unretained(this)));
+  EXPECT_EQ(0, last_cleared_page_count());
+  EXPECT_EQ(3, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::UNNECESSARY, last_storage_clear_result());
+
+  // After more days, all pages should be cleared.
+  clock()->Advance(base::TimeDelta::FromDays(30));
+  manager()->ClearPagesIfNeeded(base::Bind(
+      &OfflinePageStorageManagerTest::OnPagesCleared, base::Unretained(this)));
+  EXPECT_EQ(30, last_cleared_page_count());
+  EXPECT_EQ(4, total_cleared_times());
+  EXPECT_EQ(StorageClearResult::SUCCESS, last_storage_clear_result());
 }
+
 }  // namespace offline_pages