TaskScheduler [3/9] Task and Sequence

base/task_scheduler/task_traits.cc

 // 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 "base/task_scheduler/task_traits.h"
 
+#include <ostream>
+
 namespace base {
 
 // Do not rely on defaults hard-coded below beyond the guarantees described in
 // the header; anything else is subject to change. Tasks should explicitly
 // request defaults if the behavior is critical to the task.
 TaskTraits::TaskTraits()
     : with_file_io_(false),
       priority_(TaskPriority::BACKGROUND),
       shutdown_behavior_(TaskShutdownBehavior::BLOCK_SHUTDOWN) {}
 
 TaskTraits::~TaskTraits() = default;
 
 TaskTraits& TaskTraits::WithFileIO() {
   with_file_io_ = true;
   return *this;
 }
 
 TaskTraits& TaskTraits::WithPriority(TaskPriority priority) {
   priority_ = priority;
   return *this;
 }
 
 TaskTraits& TaskTraits::WithShutdownBehavior(
     TaskShutdownBehavior shutdown_behavior) {
   shutdown_behavior_ = shutdown_behavior;
   return *this;
 }
 
+void PrintTo(const TaskPriority& task_priority, std::ostream* os) {

[robliao, 2016/02/19 02:33:43]

Can this go in a test only utils file?

[fdoray, 2016/02/19 14:12:15]

See comment in task_traits.h

+  switch (task_priority) {
+    case TaskPriority::BACKGROUND:
+      *os << "BACKGROUND";
+      break;
+    case TaskPriority::USER_VISIBLE:
+      *os << "USER_VISIBLE";
+      break;
+    case TaskPriority::USER_BLOCKING:
+      *os << "USER_BLOCKING";
+      break;

[robliao, 2016/02/19 02:33:43]

default case: DCHECK(false).

[fdoray, 2016/02/19 14:12:15]

See gab's comment
https://codereview.chromium.org/1705253002/diff/1/base/task_scheduler/test_ut...

+  }
+}
+
 }  // namespace base