[Offline Pages] Remove expired requests from the queue.

components/offline_pages/background/request_picker_unittest.cc

Index: components/offline_pages/background/request_picker_unittest.cc
diff --git a/components/offline_pages/background/request_picker_unittest.cc b/components/offline_pages/background/request_picker_unittest.cc
index cd74c70db4cc43d4e52c7f8a5e2219bf6e7c12d2..7082481854fa2e18547ba9479748a9f1de59882a 100644
--- a/components/offline_pages/background/request_picker_unittest.cc
+++ b/components/offline_pages/background/request_picker_unittest.cc
@@ -9,6 +9,8 @@
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "components/offline_pages/background/device_conditions.h"
+#include "components/offline_pages/background/offliner_factory.h"
+#include "components/offline_pages/background/offliner_policy.h"
 #include "components/offline_pages/background/request_queue.h"
 #include "components/offline_pages/background/request_queue_in_memory_store.h"
 #include "components/offline_pages/background/save_page_request.h"
@@ -38,6 +40,116 @@ const bool kPreferEarlier = true;
 const bool kPreferRetryCount = true;
 }  // namespace
 
+class SchedulerStub : public Scheduler {
+ public:
+  SchedulerStub()
+      : schedule_called_(false),
+        unschedule_called_(false),
+        conditions_(false, 0, false) {}
+
+  void Schedule(const TriggerConditions& trigger_conditions) override {
+    schedule_called_ = true;
+    conditions_ = trigger_conditions;
+  }
+
+  // Unschedules the currently scheduled task, if any.
+  void Unschedule() override { unschedule_called_ = true; }
+
+  bool schedule_called() const { return schedule_called_; }
+
+  bool unschedule_called() const { return unschedule_called_; }
+
+  TriggerConditions const* conditions() const { return &conditions_; }
+
+ private:
+  bool schedule_called_;
+  bool unschedule_called_;
+  TriggerConditions conditions_;
+};
+
+class OfflinerStub : public Offliner {
+ public:
+  OfflinerStub()
+      : request_(kRequestId1,
+                 kUrl1,
+                 kClientId1,
+                 base::Time::Now(),
+                 kUserRequested),
+        enable_callback_(false),
+        cancel_called_(false) {}
+
+  bool LoadAndSave(const SavePageRequest& request,
+                   const CompletionCallback& callback) override {
+    callback_ = callback;
+    request_ = request;
+    // Post the callback on the run loop.
+    if (enable_callback_) {
+      base::ThreadTaskRunnerHandle::Get()->PostTask(
+          FROM_HERE,
+          base::Bind(callback, request, Offliner::RequestStatus::SAVED));
+    }
+    return true;
+  }
+
+  void Cancel() override { cancel_called_ = true; }
+
+  void enable_callback(bool enable) { enable_callback_ = enable; }
+
+  bool cancel_called() { return cancel_called_; }
+
+ private:
+  CompletionCallback callback_;
+  SavePageRequest request_;
+  bool enable_callback_;
+  bool cancel_called_;
+};
+
+class OfflinerFactoryStub : public OfflinerFactory {
+ public:
+  OfflinerFactoryStub() : offliner_(nullptr) {}
+
+  Offliner* GetOffliner(const OfflinerPolicy* policy) override {
+    if (offliner_.get() == nullptr) {
+      offliner_.reset(new OfflinerStub());
+    }
+    return offliner_.get();
+  }
+
+ private:
+  std::unique_ptr<OfflinerStub> offliner_;
+};
+
+class RequestCoordinatorStub : public RequestCoordinator {
+ public:
+  RequestCoordinatorStub()
+      : RequestCoordinator(
+            std::unique_ptr<OfflinerPolicy>(new OfflinerPolicy()),
+            std::unique_ptr<OfflinerFactory>(new OfflinerFactoryStub()),
+            std::unique_ptr<RequestQueue>(
+                new RequestQueue(std::unique_ptr<RequestQueueInMemoryStore>(
+                    new RequestQueueInMemoryStore()))),
+            std::unique_ptr<Scheduler>(new SchedulerStub())) {}
+
+  void NotifyRequestsExpired(
+      const std::vector<SavePageRequest>& expired_requests,
+      RequestQueue::UpdateRequestResult result) override {
+    last_request_expiration_result_ = result;
+    last_expired_requests_ = expired_requests;
+  }
+
+  const std::vector<SavePageRequest>& last_expired_requests() {
+    return last_expired_requests_;
+  }
+
+  RequestQueue::UpdateRequestResult last_request_expiration_result() {
+    return last_request_expiration_result_;
+  }
+
+ private:
+  RequestQueue::UpdateRequestResult last_request_expiration_result_;
+  std::vector<SavePageRequest> last_expired_requests_;
+};
+
 class RequestPickerTest : public testing::Test {
  public:
   RequestPickerTest();
@@ -58,11 +170,14 @@ class RequestPickerTest : public testing::Test {
   void QueueRequestsAndChooseOne(const SavePageRequest& request1,
                                  const SavePageRequest& request2);
 
+  RequestCoordinatorStub* GetCoordinator() { return coordinator_.get(); }
+
  protected:
   // The request queue is simple enough we will use a real queue with a memory
   // store instead of a stub.
   std::unique_ptr<RequestQueue> queue_;
   std::unique_ptr<RequestPicker> picker_;
+  std::unique_ptr<RequestCoordinatorStub> coordinator_;
   std::unique_ptr<SavePageRequest> last_picked_;
   std::unique_ptr<OfflinerPolicy> policy_;
   bool request_queue_empty_called_;
@@ -83,7 +198,9 @@ void RequestPickerTest::SetUp() {
       new RequestQueueInMemoryStore());
   queue_.reset(new RequestQueue(std::move(store)));
   policy_.reset(new OfflinerPolicy());
-  picker_.reset(new RequestPicker(queue_.get(), policy_.get()));
+  coordinator_.reset(new RequestCoordinatorStub());
+  picker_.reset(
+      new RequestPicker(queue_.get(), policy_.get(), coordinator_.get()));
   request_queue_empty_called_ = false;
 }
 
@@ -143,6 +260,28 @@ TEST_F(RequestPickerTest, PickFromEmptyQueue) {
   EXPECT_TRUE(request_queue_empty_called_);
 }
 
+TEST_F(RequestPickerTest, ChooseNonExpiredRequest) {
+  base::Time creation_time = base::Time::Now();
+  base::Time expired_time =
+      creation_time -
+      base::TimeDelta::FromSeconds(kRequestExpirationTimeInSeconds + 60);
+  SavePageRequest request1(kRequestId1, kUrl1, kClientId1, creation_time,
+                           kUserRequested);
+  SavePageRequest request2(kRequestId2, kUrl2, kClientId2, expired_time,
+                           kUserRequested);
+
+  QueueRequestsAndChooseOne(request1, request2);
+
+  PumpLoop();
+
+  EXPECT_EQ(kRequestId1, last_picked_->request_id());
+  EXPECT_FALSE(request_queue_empty_called_);
+  EXPECT_EQ(kRequestId2,
+            GetCoordinator()->last_expired_requests()[0].request_id());
+  EXPECT_EQ(RequestQueue::UpdateRequestResult::SUCCESS,
+            GetCoordinator()->last_request_expiration_result());
+}
+
 TEST_F(RequestPickerTest, ChooseRequestWithHigherRetryCount) {
   policy_.reset(new OfflinerPolicy(kPreferUntried, kPreferEarlier,
                                    kPreferRetryCount, kMaxStartedTries,
@@ -182,7 +321,8 @@ TEST_F(RequestPickerTest, ChooseEarlierRequest) {
   policy_.reset(new OfflinerPolicy(kPreferUntried, kPreferEarlier,
                                    !kPreferRetryCount, kMaxStartedTries,
                                    kMaxCompletedTries));
-  picker_.reset(new RequestPicker(queue_.get(), policy_.get()));
+  picker_.reset(
+      new RequestPicker(queue_.get(), policy_.get(), coordinator_.get()));
 
   base::Time creation_time1 =
       base::Time::Now() - base::TimeDelta::FromSeconds(10);
@@ -204,7 +344,8 @@ TEST_F(RequestPickerTest, ChooseSameTimeRequestWithHigherRetryCount) {
   policy_.reset(new OfflinerPolicy(kPreferUntried, kPreferEarlier,
                                    !kPreferRetryCount, kMaxStartedTries,
                                    kMaxCompletedTries + 1));
-  picker_.reset(new RequestPicker(queue_.get(), policy_.get()));
+  picker_.reset(
+      new RequestPicker(queue_.get(), policy_.get(), coordinator_.get()));
 
   base::Time creation_time = base::Time::Now();
   SavePageRequest request1(kRequestId1, kUrl1, kClientId1, creation_time,
@@ -224,7 +365,8 @@ TEST_F(RequestPickerTest, ChooseRequestWithLowerRetryCount) {
   policy_.reset(new OfflinerPolicy(!kPreferUntried, kPreferEarlier,
                                    kPreferRetryCount, kMaxStartedTries,
                                    kMaxCompletedTries + 1));
-  picker_.reset(new RequestPicker(queue_.get(), policy_.get()));
+  picker_.reset(
+      new RequestPicker(queue_.get(), policy_.get(), coordinator_.get()));
 
   base::Time creation_time = base::Time::Now();
   SavePageRequest request1(kRequestId1, kUrl1, kClientId1, creation_time,
@@ -244,7 +386,8 @@ TEST_F(RequestPickerTest, ChooseLaterRequest) {
   policy_.reset(new OfflinerPolicy(kPreferUntried, !kPreferEarlier,
                                    !kPreferRetryCount, kMaxStartedTries,
                                    kMaxCompletedTries));
-  picker_.reset(new RequestPicker(queue_.get(), policy_.get()));
+  picker_.reset(
+      new RequestPicker(queue_.get(), policy_.get(), coordinator_.get()));
 
   base::Time creation_time1 =
       base::Time::Now() - base::TimeDelta::FromSeconds(10);