sync: Make nudge + config jobs reliable in SyncerThread2

chrome/browser/sync/engine/syncer_thread2_whitebox_unittest.cc

Index: chrome/browser/sync/engine/syncer_thread2_whitebox_unittest.cc
diff --git a/chrome/browser/sync/engine/syncer_thread2_whitebox_unittest.cc b/chrome/browser/sync/engine/syncer_thread2_whitebox_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e1d1218c5ce2cccd7c86cac7e8c2ddda6f547da9
--- /dev/null
+++ b/chrome/browser/sync/engine/syncer_thread2_whitebox_unittest.cc
@@ -0,0 +1,235 @@
+// 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 "base/time.h"
+#include "chrome/browser/sync/engine/mock_model_safe_workers.h"
+#include "chrome/browser/sync/engine/syncer_thread2.h"
+#include "chrome/browser/sync/sessions/sync_session_context.h"
+#include "chrome/browser/sync/sessions/test_util.h"
+#include "chrome/test/sync/engine/mock_connection_manager.h"
+#include "chrome/test/sync/engine/test_directory_setter_upper.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+using base::TimeDelta;
+using base::TimeTicks;
+
+namespace browser_sync {
+using sessions::SyncSessionContext;
+using browser_sync::Syncer;
+
+namespace s3 {
+
+class SyncerThread2WhiteboxTest : public testing::Test {
+ public:
+  virtual void SetUp() {
+    syncdb_.SetUp();
+    Syncer* syncer = new Syncer();
+    registrar_.reset(MockModelSafeWorkerRegistrar::PassiveBookmarks());
+    context_ = new SyncSessionContext(connection_.get(), syncdb_.manager(),
+        registrar_.get(), std::vector<SyncEngineEventListener*>());
+    context_->set_notifications_enabled(true);
+    context_->set_account_name("Test");
+    syncer_thread_.reset(new SyncerThread(context_, syncer));
+  }
+
+  virtual void TearDown() {
+    syncdb_.TearDown();
+  }
+
+  void SetMode(SyncerThread::Mode mode) {
+    syncer_thread_->mode_ = mode;
+  }
+
+  void SetLastSyncedTime(base::TimeTicks ticks) {
+    syncer_thread_->last_sync_session_end_time_ = ticks;
+  }
+
+  void SetServerConnection(bool connected) {
+    syncer_thread_->server_connection_ok_ = connected;
+  }
+
+  void ResetWaitInterval() {
+    syncer_thread_->wait_interval_.reset();
+  }
+
+  void SetWaitIntervalToThrottled() {
+    syncer_thread_->wait_interval_.reset(new SyncerThread::WaitInterval(
+        SyncerThread::WaitInterval::THROTTLED, TimeDelta::FromSeconds(1)));
+  }
+
+  void SetWaitIntervalToExponentialBackoff() {
+    syncer_thread_->wait_interval_.reset(
+       new SyncerThread::WaitInterval(
+       SyncerThread::WaitInterval::EXPONENTIAL_BACKOFF,
+       TimeDelta::FromSeconds(1)));
+  }
+
+  SyncerThread::JobProcessDecision DecideOnJob(
+      const SyncerThread::SyncSessionJob& job) {
+    return syncer_thread_->DecideOnJob(job);
+  }
+
+  void InitializeSyncerOnNormalMode() {
+    SetMode(SyncerThread::NORMAL_MODE);
+    ResetWaitInterval();
+    SetServerConnection(true);
+    SetLastSyncedTime(base::TimeTicks::Now());
+  }
+
+  SyncerThread::JobProcessDecision CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::SyncSessionJobPurpose purpose) {
+    struct SyncerThread::SyncSessionJob job;
+    job.purpose = purpose;
+    job.scheduled_start = TimeTicks::Now();
+    return DecideOnJob(job);
+  }
+
+ protected:
+  scoped_ptr<SyncerThread> syncer_thread_;
+
+ private:
+  scoped_ptr<MockConnectionManager> connection_;
+  SyncSessionContext* context_;
+  //MockDelayProvider* delay_;
+  scoped_ptr<MockModelSafeWorkerRegistrar> registrar_;
+  MockDirectorySetterUpper syncdb_;
+};
+
+TEST_F(SyncerThread2WhiteboxTest, SaveNudge) {
+  InitializeSyncerOnNormalMode();
+
+  // Now set the mode to configure.
+  SetMode(SyncerThread::CONFIGURATION_MODE);
+
+  SyncerThread::JobProcessDecision decision =
+      CreateAndDecideJob(SyncerThread::SyncSessionJob::NUDGE);
+
+  EXPECT_EQ(decision, SyncerThread::SAVE);
+}
+
+TEST_F(SyncerThread2WhiteboxTest, ContinueNudge) {
+  InitializeSyncerOnNormalMode();
+
+  SyncerThread::JobProcessDecision decision = CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::NUDGE);
+
+  EXPECT_EQ(decision, SyncerThread::CONTINUE);
+}
+
+TEST_F(SyncerThread2WhiteboxTest, DropPoll) {
+  InitializeSyncerOnNormalMode();
+  SetMode(SyncerThread::CONFIGURATION_MODE);
+
+  SyncerThread::JobProcessDecision decision = CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::POLL);
+
+  EXPECT_EQ(decision, SyncerThread::DROP);
+}
+
+TEST_F(SyncerThread2WhiteboxTest, ContinuePoll) {
+  InitializeSyncerOnNormalMode();
+
+  SyncerThread::JobProcessDecision decision = CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::POLL);
+
+  EXPECT_EQ(decision, SyncerThread::CONTINUE);
+}
+
+TEST_F(SyncerThread2WhiteboxTest, ContinueConfiguration) {
+  InitializeSyncerOnNormalMode();
+  SetMode(SyncerThread::CONFIGURATION_MODE);
+
+  SyncerThread::JobProcessDecision decision = CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::CONFIGURATION);
+
+  EXPECT_EQ(decision, SyncerThread::CONTINUE);
+}
+
+TEST_F(SyncerThread2WhiteboxTest, SaveConfigurationWhileThrottled) {
+  InitializeSyncerOnNormalMode();
+  SetMode(SyncerThread::CONFIGURATION_MODE);
+
+  SetWaitIntervalToThrottled();
+
+  SyncerThread::JobProcessDecision decision = CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::CONFIGURATION);
+
+  EXPECT_EQ(decision, SyncerThread::SAVE);
+}
+
+TEST_F(SyncerThread2WhiteboxTest, SaveNudgeWhileThrottled) {
+  InitializeSyncerOnNormalMode();
+  SetMode(SyncerThread::CONFIGURATION_MODE);
+
+  SetWaitIntervalToThrottled();
+
+  SyncerThread::JobProcessDecision decision = CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::NUDGE);
+
+  EXPECT_EQ(decision, SyncerThread::SAVE);
+
+}
+
+TEST_F(SyncerThread2WhiteboxTest, ContinueClearUserDataUnderAllCircumstances) {
+  InitializeSyncerOnNormalMode();
+
+  SetMode(SyncerThread::CONFIGURATION_MODE);
+  SetWaitIntervalToThrottled();
+  SyncerThread::JobProcessDecision decision = CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::CLEAR_USER_DATA);
+  EXPECT_EQ(decision, SyncerThread::CONTINUE);
+
+  SetMode(SyncerThread::NORMAL_MODE);
+  SetWaitIntervalToExponentialBackoff();
+  decision = CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::CLEAR_USER_DATA);
+  EXPECT_EQ(decision, SyncerThread::CONTINUE);
+}
+
+TEST_F(SyncerThread2WhiteboxTest, ContinueNudgeWhileExponentialBackOff) {
+  InitializeSyncerOnNormalMode();
+  SetMode(SyncerThread::NORMAL_MODE);
+  SetWaitIntervalToExponentialBackoff();
+
+  SyncerThread::JobProcessDecision decision = CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::NUDGE);
+
+  EXPECT_EQ(decision, SyncerThread::CONTINUE);
+}
+
+TEST_F(SyncerThread2WhiteboxTest, DropNudgeWhileExponentialBackOff) {
+  InitializeSyncerOnNormalMode();
+  SetMode(SyncerThread::NORMAL_MODE);
+  SetWaitIntervalToExponentialBackoff();
+
+  syncer_thread_->wait_interval_->had_nudge = true;
+
+  SyncerThread::JobProcessDecision decision = CreateAndDecideJob(
+      SyncerThread::SyncSessionJob::NUDGE);
+
+  EXPECT_EQ(decision, SyncerThread::DROP);
+}
+
+TEST_F(SyncerThread2WhiteboxTest, ContinueCanaryJobConfig) {
+  InitializeSyncerOnNormalMode();
+  SetMode(SyncerThread::CONFIGURATION_MODE);
+  SetWaitIntervalToExponentialBackoff();
+
+  struct SyncerThread::SyncSessionJob job;
+  job.purpose = SyncerThread::SyncSessionJob::CONFIGURATION;
+  job.scheduled_start = TimeTicks::Now();
+  job.is_canary_job = true;
+  SyncerThread::JobProcessDecision decision = DecideOnJob(job);
+
+  EXPECT_EQ(decision, SyncerThread::CONTINUE);
+}
+
+
+}  // namespace s3
+}  // namespace browser_sync
+
+// SyncerThread won't outlive the test!
+DISABLE_RUNNABLE_METHOD_REFCOUNT(
+    browser_sync::s3::SyncerThread2WhiteboxTest);