Index: net/base/network_throttle_manager_impl_unittest.cc |
diff --git a/net/base/network_throttle_manager_impl_unittest.cc b/net/base/network_throttle_manager_impl_unittest.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..bc672b2c67975b48def577fe6f5a02fda2947aa6 |
--- /dev/null |
+++ b/net/base/network_throttle_manager_impl_unittest.cc |
@@ -0,0 +1,568 @@ |
+// Copyright 2016 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 "net/base/network_throttle_manager_impl.h" |
+ |
+#include <memory> |
+ |
+#include "base/bind.h" |
+#include "base/callback.h" |
+#include "base/callback_helpers.h" |
+#include "base/memory/scoped_vector.h" |
+#include "base/run_loop.h" |
+#include "base/test/simple_test_tick_clock.h" |
+#include "base/test/test_message_loop.h" |
+#include "net/base/request_priority.h" |
+#include "testing/gtest/include/gtest/gtest.h" |
+ |
+namespace net { |
+ |
+namespace { |
+ |
+#include "testing/gtest/include/gtest/gtest.h" |
+ |
+const int kInitialAgeHorizonForUncountedRequests = |
+ (NetworkThrottleManagerImpl::kInitialMedianInMs * |
+ NetworkThrottleManagerImpl::kMedianLifetimeMultiple); |
+ |
+// Must be greater than the corresponding fudge factor in |
+// network_throttle_manager_impl.cc. |
+const int kAgeHorizonFudgeFactor = 20; |
+ |
+// Test fixture for throttle manager tests. |
+ |
+// Note that the manager owned and managed by this fixture has a clock |
+// that is set to base::TimeTicks::Now() (which value is also exposed |
+// via an accessor) on creation but does not change without |
+// intervention by tests (to make the tests more predictable). |
+// |
+// HOWEVER, also note that that manager uses the base::Timer class, which |
+// uses the system clock, which isn't affected by the setting of the |
+// test fixture clock. So test should be written to a) avoid situations |
+// in which the manager's timer will actually go off based on the system |
+// clock, and b) call ConditionallyTriggerTimerForTesting() (which does |
+// evaluate the manager's clock) when timer based tests are necessary. |
+class NetworkThrottleManagerTest : public testing::Test, |
+ NetworkThrottleManager::ThrottleDelegate { |
+ public: |
+ NetworkThrottleManagerTest() |
+ : clock_(new base::SimpleTestTickClock), |
+ now_(base::TimeTicks::Now()), |
+ throttle_state_change_count_(0), |
+ last_throttle_to_change_state_(nullptr), |
+ throttle_manager_(new NetworkThrottleManagerImpl) { |
+ clock_->SetNowTicks(now_); |
+ throttle_manager_->SetTickClockForTesting( |
+ std::unique_ptr<base::TickClock>(clock_)); |
+ } |
+ |
+ protected: |
+ enum ExpectedThrottleBlockState { BLOCKED, UNBLOCKED }; |
+ |
+ base::TimeTicks now() { return now_; } |
+ NetworkThrottleManagerImpl* throttle_manager() { |
+ return throttle_manager_.get(); |
+ } |
+ |
+ // Set the offset of the test clock from now_. |
+ void SetClockDelta(base::TimeDelta time_delta) { |
+ clock_->SetNowTicks(now_ + time_delta); |
+ } |
+ |
+ // Throttle creation |
+ std::unique_ptr<NetworkThrottleManager::Throttle> CreateThrottle( |
+ net::RequestPriority priority, |
+ ExpectedThrottleBlockState throttle_state) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle( |
+ throttle_manager_->CreateThrottle(this, priority, false)); |
+ EXPECT_EQ(throttle_state == BLOCKED, throttle->IsBlocked()); |
+ return throttle; |
+ } |
+ std::unique_ptr<NetworkThrottleManager::Throttle> |
+ CreateThrottleIgnoringLimits(net::RequestPriority priority) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle( |
+ throttle_manager_->CreateThrottle(this, priority, true)); |
+ EXPECT_FALSE(throttle->IsBlocked()); |
+ return throttle; |
+ } |
+ |
+ // Throttle state change information. |
+ int throttle_state_change_count() { return throttle_state_change_count_; } |
+ NetworkThrottleManager::Throttle* last_throttle_to_change_state() { |
+ return last_throttle_to_change_state_; |
+ } |
+ |
+ // Setting a callback to be invoked when a throttle's state changes. |
+ void SetThrottleStateChangedCallback(const base::Closure& callback) { |
+ throttle_state_changed_callback_ = callback; |
+ } |
+ |
+ private: |
+ // NetworkThrottleManager::Delegate |
+ void OnThrottleUnblocked( |
+ NetworkThrottleManager::Throttle* throttle) override { |
+ ++throttle_state_change_count_; |
+ last_throttle_to_change_state_ = throttle; |
+ if (!throttle_state_changed_callback_.is_null()) |
+ base::ResetAndReturn(&throttle_state_changed_callback_).Run(); |
+ } |
+ |
+ base::SimpleTestTickClock* clock_; |
+ base::TimeTicks now_; |
+ int throttle_state_change_count_; |
+ NetworkThrottleManager::Throttle* last_throttle_to_change_state_; |
+ std::unique_ptr<NetworkThrottleManagerImpl> throttle_manager_; |
+ base::Closure throttle_state_changed_callback_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(NetworkThrottleManagerTest); |
+}; |
+ |
+// Check to confirm that all created throttles at priorities other than |
+// THROTTLED start unblocked. |
+TEST_F(NetworkThrottleManagerTest, AllUnthrottled) { |
+ for (int i = MINIMUM_PRIORITY; i <= MAXIMUM_PRIORITY; ++i) { |
+ if (i == THROTTLED) |
+ continue; |
+ CreateThrottle(static_cast<RequestPriority>(i), UNBLOCKED); |
+ } |
+} |
+ |
+// Check for basic semantics around the new THROTTLED level. |
+TEST_F(NetworkThrottleManagerTest, ThrottledBlocking) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(THROTTLED, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(THROTTLED, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle4( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle5( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ |
+ throttle1.reset(); |
+ base::RunLoop().RunUntilIdle(); // Allow posttasks to run. |
+ EXPECT_EQ(1, throttle_state_change_count()); |
+ EXPECT_EQ(throttle3.get(), last_throttle_to_change_state()); |
+ |
+ EXPECT_FALSE(throttle3->IsBlocked()); |
+ EXPECT_TRUE(throttle4->IsBlocked()); |
+ EXPECT_TRUE(throttle5->IsBlocked()); |
+ |
+ throttle2.reset(); |
+ base::RunLoop().RunUntilIdle(); // Allow posttasks to run. |
+ EXPECT_EQ(2, throttle_state_change_count()); |
+ EXPECT_EQ(throttle4.get(), last_throttle_to_change_state()); |
+ |
+ EXPECT_FALSE(throttle3->IsBlocked()); |
+ EXPECT_FALSE(throttle4->IsBlocked()); |
+ EXPECT_TRUE(throttle5->IsBlocked()); |
+} |
+ |
+// Check that THROTTLED semantics are dependent on all outstanding requests. |
+TEST_F(NetworkThrottleManagerTest, ThrottledBlockingMultiPriority) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(HIGHEST, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(LOW, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle4( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle5( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ |
+ throttle1.reset(); |
+ base::RunLoop().RunUntilIdle(); // Allow posttasks to run. |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ EXPECT_FALSE(throttle3->IsBlocked()); |
+ EXPECT_TRUE(throttle4->IsBlocked()); |
+ EXPECT_TRUE(throttle5->IsBlocked()); |
+ |
+ throttle2.reset(); |
+ base::RunLoop().RunUntilIdle(); // Allow posttasks to run. |
+ EXPECT_EQ(1, throttle_state_change_count()); |
+ EXPECT_EQ(throttle4.get(), last_throttle_to_change_state()); |
+ |
+ EXPECT_FALSE(throttle3->IsBlocked()); |
+ EXPECT_FALSE(throttle4->IsBlocked()); |
+ EXPECT_TRUE(throttle5->IsBlocked()); |
+ |
+ throttle3.reset(); |
+ base::RunLoop().RunUntilIdle(); // Allow posttasks to run. |
+ EXPECT_EQ(2, throttle_state_change_count()); |
+ EXPECT_EQ(throttle5.get(), last_throttle_to_change_state()); |
+ |
+ EXPECT_FALSE(throttle4->IsBlocked()); |
+ EXPECT_FALSE(throttle5->IsBlocked()); |
+} |
+ |
+// Check that a SetPriority() away from THROTTLED results in unblocking |
+// and an upcall. |
+TEST_F(NetworkThrottleManagerTest, ThrottledSetPriority) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(THROTTLED, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(THROTTLED, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle4( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ |
+ throttle3->SetPriority(LOW); |
+ EXPECT_EQ(1, throttle_state_change_count()); |
+ EXPECT_EQ(throttle3.get(), last_throttle_to_change_state()); |
+ EXPECT_FALSE(throttle3->IsBlocked()); |
+ EXPECT_TRUE(throttle4->IsBlocked()); |
+} |
+ |
+void ResetThrottles(bool* function_called, |
+ ScopedVector<NetworkThrottleManager::Throttle> throttles) { |
+ *function_called = true; |
+ // All pointers in the vector should be deleted on exit. |
+} |
+ |
+// Check that tearing down all elements in the NTM on a SetPriority |
+// upcall doesn't create any problems. |
+TEST_F(NetworkThrottleManagerTest, ThrottleTeardown) { |
+ ScopedVector<NetworkThrottleManager::Throttle> throttles; |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle_temporary; |
+ |
+ throttles.push_back(std::unique_ptr<NetworkThrottleManager::Throttle>( |
+ CreateThrottle(THROTTLED, UNBLOCKED))); |
+ throttles.push_back(std::unique_ptr<NetworkThrottleManager::Throttle>( |
+ CreateThrottle(THROTTLED, UNBLOCKED))); |
+ |
+ // Note that if there is more than one throttle blocked, then the |
+ // number of throttle state changes is dependent on destruction order. |
+ // So only one blocked throttle is created. |
+ throttle_temporary = CreateThrottle(THROTTLED, BLOCKED); |
+ NetworkThrottleManager::Throttle* throttle3 = throttle_temporary.get(); |
+ throttles.push_back(std::move(throttle_temporary)); |
+ |
+ bool callback_called(false); |
+ SetThrottleStateChangedCallback( |
+ base::Bind(&ResetThrottles, &callback_called, base::Passed(&throttles))); |
+ |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ |
+ throttle3->SetPriority(LOW); |
+ |
+ // If the test is functioning as expected, throttle3 now points to |
+ // a deleted object and can no longer be indirected through. |
+ |
+ EXPECT_TRUE(callback_called); |
+ EXPECT_EQ(1, throttle_state_change_count()); |
+ EXPECT_EQ(throttle3, last_throttle_to_change_state()); |
+} |
+ |
+// Note that this routine is dependent on priority setting *not* resulting in |
+// destruction of any throttle and should only be used in tests where that is |
+// true. |
+void SetAllToPriority( |
+ RequestPriority priority, |
+ std::vector<NetworkThrottleManager::Throttle*> throttles) { |
+ for (size_t i = 0; i < throttles.size(); ++i) |
+ throttles[i]->SetPriority(priority); |
+} |
+ |
+// Check that modifying all the priorities of the allocated throttles in |
+// the callback works properly. |
+TEST_F(NetworkThrottleManagerTest, ThrottlePriorityReset) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(THROTTLED, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(THROTTLED, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle4( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ |
+ std::vector<NetworkThrottleManager::Throttle*> throttles; |
+ throttles.push_back(throttle1.get()); |
+ throttles.push_back(throttle2.get()); |
+ throttles.push_back(throttle3.get()); |
+ |
+ SetThrottleStateChangedCallback( |
+ base::Bind(&SetAllToPriority, MEDIUM, base::Passed(&throttles))); |
+ |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ throttle3->SetPriority(HIGHEST); |
+ |
+ // Expected result: throttles 1-3 @ medium priority (the callback should |
+ // have overridden the priority setting above), only throttle 4 blocked |
+ // (throttle3 should have been unblocked by either of the priority changes), |
+ // and one state changes (the unblocking). |
+ EXPECT_EQ(MEDIUM, throttle1->Priority()); |
+ EXPECT_EQ(MEDIUM, throttle2->Priority()); |
+ EXPECT_EQ(MEDIUM, throttle3->Priority()); |
+ EXPECT_EQ(THROTTLED, throttle4->Priority()); |
+ EXPECT_FALSE(throttle1->IsBlocked()); |
+ EXPECT_FALSE(throttle2->IsBlocked()); |
+ EXPECT_FALSE(throttle3->IsBlocked()); |
+ EXPECT_TRUE(throttle4->IsBlocked()); |
+ EXPECT_EQ(1, throttle_state_change_count()); |
+} |
+ |
+// Check that modifying the priority of a request from a non-THROTTLED |
+// value to THROTTLED causes no change in behavior. |
+TEST_F(NetworkThrottleManagerTest, ThrottlePriorityResetToThrottled) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(THROTTLED, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(THROTTLED, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(LOW, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle4( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ throttle3->SetPriority(THROTTLED); |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ |
+ EXPECT_FALSE(throttle1->IsBlocked()); |
+ EXPECT_FALSE(throttle2->IsBlocked()); |
+ EXPECT_FALSE(throttle3->IsBlocked()); |
+ EXPECT_TRUE(throttle4->IsBlocked()); |
+ |
+ EXPECT_EQ(THROTTLED, throttle1->Priority()); |
+ EXPECT_EQ(THROTTLED, throttle2->Priority()); |
+ EXPECT_EQ(THROTTLED, throttle3->Priority()); |
+ EXPECT_EQ(THROTTLED, throttle4->Priority()); |
+} |
+ |
+// Confirm that old requests don't count against the limit. |
+TEST_F(NetworkThrottleManagerTest, DontCountAgedRequests) { |
+ const int age_in_days_of_old_throttles = 4; |
+ |
+ // Confirm default median and timing means that 4 days is long enough ago |
+ // to be aged out. |
+ EXPECT_GT(age_in_days_of_old_throttles * 24 * 60 * 60 * 1000, |
+ kInitialAgeHorizonForUncountedRequests); |
+ |
+ SetClockDelta(-base::TimeDelta::FromDays(age_in_days_of_old_throttles)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ |
+ SetClockDelta(base::TimeDelta()); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(LOW, UNBLOCKED)); |
+ |
+ // First throttled request should not be blocked. |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle4( |
+ CreateThrottle(THROTTLED, UNBLOCKED)); |
+ |
+ // Second should be. |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle5( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ |
+ // Destroying the old requests should not result in any upcalls. |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ throttle1.reset(); |
+ base::RunLoop().RunUntilIdle(); // Allow posttasks to run. |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ throttle2.reset(); |
+ base::RunLoop().RunUntilIdle(); // Allow posttasks to run. |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ |
+ // But destroying a new request should result in a state change. |
+ throttle3.reset(); |
+ base::RunLoop().RunUntilIdle(); // Allow posttasks to run. |
+ EXPECT_EQ(1, throttle_state_change_count()); |
+ EXPECT_EQ(throttle5.get(), last_throttle_to_change_state()); |
+} |
+ |
+// Confirm that a slew of throttles of a specific age will shift the |
+// median for determining "aged requests" to that age. |
+TEST_F(NetworkThrottleManagerTest, ShiftMedian) { |
+ // Setup two throttles of age *just short* of aging out; confirm |
+ // they result in blocked THROTTLED requests. |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ SetClockDelta(base::TimeDelta::FromMilliseconds( |
+ kInitialAgeHorizonForUncountedRequests - 1)); |
+ EXPECT_FALSE(throttle_manager()->ConditionallyTriggerTimerForTesting()); |
+ |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ |
+ throttle1.reset(); |
+ throttle2.reset(); |
+ throttle3.reset(); |
+ base::RunLoop().RunUntilIdle(); // Allow posttasks to run. |
+ |
+ // Create 100 throttles and destroy them, effectively with lifetime zero. |
+ // This should substantially decrease the median age estimate. |
+ SetClockDelta(base::TimeDelta()); |
+ for (int i = 0; i < 100; ++i) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> tmp( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ } |
+ |
+ // Clear out any possible leftover timer by setting the clock to a point |
+ // in the future at which it will definitely go off, and triggering it. |
+ SetClockDelta(base::TimeDelta::FromMilliseconds( |
+ 2 * kInitialAgeHorizonForUncountedRequests + kAgeHorizonFudgeFactor)); |
+ throttle_manager()->ConditionallyTriggerTimerForTesting(); |
+ |
+ // The identical test above should no longer result in blocked throttles. |
+ SetClockDelta(base::TimeDelta()); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle5( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle6( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ SetClockDelta(base::TimeDelta::FromMilliseconds( |
+ kInitialAgeHorizonForUncountedRequests - 1)); |
+ EXPECT_TRUE(throttle_manager()->ConditionallyTriggerTimerForTesting()); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle7( |
+ CreateThrottle(THROTTLED, UNBLOCKED)); |
+} |
+ |
+// Confirm that just "aging out" requests will result in unblocking |
+// blocked requests. |
+TEST_F(NetworkThrottleManagerTest, AgeInvalidThrottles) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ SetClockDelta(base::TimeDelta::FromMilliseconds( |
+ kInitialAgeHorizonForUncountedRequests + kAgeHorizonFudgeFactor)); |
+ EXPECT_TRUE(throttle_manager()->ConditionallyTriggerTimerForTesting()); |
+ EXPECT_EQ(1, throttle_state_change_count()); |
+ EXPECT_EQ(throttle3.get(), last_throttle_to_change_state()); |
+ EXPECT_FALSE(throttle3->IsBlocked()); |
+} |
+ |
+// Confirm that if throttles are unblocked and made active by all |
+// existing outstanding throttles aging out, they will also eventually |
+// age out and let new throttles through. |
+TEST_F(NetworkThrottleManagerTest, NewlyUnblockedThrottlesAlsoAge) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle4( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle5( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle6( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ |
+ // Age the first two throttles out of the outstanding, which should |
+ // result in the next two throttles becoming unblocked (and in the |
+ // oustanding list). (The internal implementation will zero out |
+ // the outstanding queue and then add in the two new unblocked throttles.) |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ SetClockDelta(base::TimeDelta::FromMilliseconds( |
+ kInitialAgeHorizonForUncountedRequests + kAgeHorizonFudgeFactor)); |
+ EXPECT_TRUE(throttle_manager()->ConditionallyTriggerTimerForTesting()); |
+ EXPECT_EQ(2, throttle_state_change_count()); |
+ EXPECT_FALSE(throttle3->IsBlocked()); |
+ EXPECT_FALSE(throttle4->IsBlocked()); |
+ |
+ // Age the next two throttles out of the outstanding queue, which |
+ // should result in the next two throttles becoming unblocked (and |
+ // in the oustanding list). This will only happen if a timer was properly |
+ // set in the above age process as the oustanding queue went through |
+ // the empty state. |
+ SetClockDelta(base::TimeDelta::FromMilliseconds( |
+ 2 * (kInitialAgeHorizonForUncountedRequests + kAgeHorizonFudgeFactor))); |
+ EXPECT_TRUE(throttle_manager()->ConditionallyTriggerTimerForTesting()); |
+ EXPECT_EQ(4, throttle_state_change_count()); |
+ EXPECT_FALSE(throttle5->IsBlocked()); |
+ EXPECT_FALSE(throttle6->IsBlocked()); |
+} |
+ |
+// Confirm that throttles that are blocked for a while and then |
+// unblocked don't "age out". |
+TEST_F(NetworkThrottleManagerTest, AgeBlockedThrottles) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle4( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle5( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ SetClockDelta(base::TimeDelta::FromMilliseconds( |
+ kInitialAgeHorizonForUncountedRequests + kAgeHorizonFudgeFactor)); |
+ EXPECT_TRUE(throttle_manager()->ConditionallyTriggerTimerForTesting()); |
+ |
+ // If blocked throttles aged out, all three throttles should have been |
+ // unblocked. If not, only the two replacing the IDLE throttles should |
+ // have. |
+ EXPECT_EQ(2, throttle_state_change_count()); |
+} |
+ |
+// Confirm that deleting old throttles before they age out doesn't |
+// interfere with the aging out of more recent throttles. |
+TEST_F(NetworkThrottleManagerTest, DeletionAgingInterference) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ |
+ SetClockDelta(base::TimeDelta::FromMilliseconds( |
+ kInitialAgeHorizonForUncountedRequests / 2)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle4( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle5( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ EXPECT_FALSE(throttle_manager()->ConditionallyTriggerTimerForTesting()); |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ |
+ throttle1.reset(); |
+ throttle2.reset(); |
+ EXPECT_FALSE(throttle_manager()->ConditionallyTriggerTimerForTesting()); |
+ EXPECT_EQ(0, throttle_state_change_count()); |
+ |
+ SetClockDelta(base::TimeDelta::FromMilliseconds( |
+ (3 * kInitialAgeHorizonForUncountedRequests / 2 + |
+ 2 * kAgeHorizonFudgeFactor))); |
+ EXPECT_TRUE(throttle_manager()->ConditionallyTriggerTimerForTesting()); |
+ EXPECT_EQ(1, throttle_state_change_count()); |
+ EXPECT_EQ(throttle3.get(), last_throttle_to_change_state()); |
+ EXPECT_FALSE(throttle3->IsBlocked()); |
+} |
+ |
+// Confirm that "ignore_limits" boolean is respected. |
+TEST_F(NetworkThrottleManagerTest, IgnoreLimits) { |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle1( |
+ CreateThrottle(HIGHEST, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle2( |
+ CreateThrottle(LOW, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle3( |
+ CreateThrottle(IDLE, UNBLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle4( |
+ CreateThrottle(THROTTLED, BLOCKED)); |
+ std::unique_ptr<NetworkThrottleManager::Throttle> throttle5( |
+ CreateThrottleIgnoringLimits(THROTTLED)); |
+} |
+ |
+} // namespace |
+ |
+} // namespace net |