Move task_runner_test_template.* into base/test and test_support_base

base/task_runner_test_template.h

-// Copyright (c) 2012 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.
-
-// This class defines tests that implementations of TaskRunner should
-// pass in order to be conformant.  Here's how you use it to test your
-// implementation.
-//
-// Say your class is called MyTaskRunner.  Then you need to define a
-// class called MyTaskRunnerTestDelegate in my_task_runner_unittest.cc
-// like this:
-//
-//   class MyTaskRunnerTestDelegate {
-//    public:
-//     // Tasks posted to the task runner after this and before
-//     // StopTaskRunner() is called is called should run successfully.
-//     void StartTaskRunner() {
-//       ...
-//     }
-//
-//     // Should return the task runner implementation.  Only called
-//     // after StartTaskRunner and before StopTaskRunner.
-//     scoped_refptr<MyTaskRunner> GetTaskRunner() {
-//       ...
-//     }
-//
-//     // Stop the task runner and make sure all tasks posted before
-//     // this is called are run.
-//     void StopTaskRunner() {
-//       ...
-//     }
-//
-//     // Returns whether or not the task runner obeys non-zero delays.
-//     bool TaskRunnerHandlesNonZeroDelays() const {
-//       return true;
-//     }
-//   };
-//
-// The TaskRunnerTest test harness will have a member variable of
-// this delegate type and will call its functions in the various
-// tests.
-//
-// Then you simply #include this file as well as gtest.h and add the
-// following statement to my_task_runner_unittest.cc:
-//
-//   INSTANTIATE_TYPED_TEST_CASE_P(
-//       MyTaskRunner, TaskRunnerTest, MyTaskRunnerTestDelegate);
-//
-// Easy!
-
-#ifndef BASE_TASK_RUNNER_TEST_TEMPLATE_H_
-#define BASE_TASK_RUNNER_TEST_TEMPLATE_H_
-#pragma once
-
-#include <cstddef>
-#include <map>
-
-#include "base/basictypes.h"
-#include "base/bind.h"
-#include "base/callback.h"
-#include "base/memory/ref_counted.h"
-#include "base/synchronization/lock.h"
-#include "base/task_runner.h"
-#include "base/threading/thread.h"
-#include "base/tracked_objects.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace base {
-
-namespace internal {
-
-// Utility class that keeps track of how many times particular tasks
-// are run.
-class TaskTracker : public RefCountedThreadSafe<TaskTracker> {
- public:
-  TaskTracker();
-
-  // Returns a closure that runs the given task and increments the run
-  // count of |i| by one.  |task| may be null.  It is guaranteed that
-  // only one task wrapped by a given tracker will be run at a time.
-  Closure WrapTask(const Closure& task, int i);
-
-  std::map<int, int> GetTaskRunCounts() const;
-
- private:
-  friend class RefCountedThreadSafe<TaskTracker>;
-
-  ~TaskTracker();
-
-  void RunTask(const Closure& task, int i);
-
-  mutable Lock task_run_counts_lock_;
-  std::map<int, int> task_run_counts_;
-
-  DISALLOW_COPY_AND_ASSIGN(TaskTracker);
-};
-
-}  // namespace internal
-
-template <typename TaskRunnerTestDelegate>
-class TaskRunnerTest : public testing::Test {
- protected:
-  TaskRunnerTest() : task_tracker_(new internal::TaskTracker()) {}
-
-  const scoped_refptr<internal::TaskTracker> task_tracker_;
-  TaskRunnerTestDelegate delegate_;
-};
-
-TYPED_TEST_CASE_P(TaskRunnerTest);
-
-// We can't really test much, since TaskRunner provides very few
-// guarantees.
-
-// Post a bunch of tasks to the task runner.  They should all
-// complete.
-TYPED_TEST_P(TaskRunnerTest, Basic) {
-  std::map<int, int> expected_task_run_counts;
-
-  this->delegate_.StartTaskRunner();
-  scoped_refptr<TaskRunner> task_runner = this->delegate_.GetTaskRunner();
-  // Post each ith task i+1 times.
-  for (int i = 0; i < 20; ++i) {
-    const Closure& ith_task = this->task_tracker_->WrapTask(Closure(), i);
-    for (int j = 0; j < i + 1; ++j) {
-      task_runner->PostTask(FROM_HERE, ith_task);
-      ++expected_task_run_counts[i];
-    }
-  }
-  this->delegate_.StopTaskRunner();
-
-  EXPECT_EQ(expected_task_run_counts,
-            this->task_tracker_->GetTaskRunCounts());
-}
-
-// Post a bunch of delayed tasks to the task runner.  They should all
-// complete.
-TYPED_TEST_P(TaskRunnerTest, Delayed) {
-  if (!this->delegate_.TaskRunnerHandlesNonZeroDelays()) {
-    DLOG(INFO) << "This TaskRunner doesn't handle non-zero delays; skipping";
-    return;
-  }
-
-  std::map<int, int> expected_task_run_counts;
-
-  this->delegate_.StartTaskRunner();
-  scoped_refptr<TaskRunner> task_runner = this->delegate_.GetTaskRunner();
-  // Post each ith task i+1 times with delays from 0-i.
-  for (int i = 0; i < 20; ++i) {
-    const Closure& ith_task = this->task_tracker_->WrapTask(Closure(), i);
-    for (int j = 0; j < i + 1; ++j) {
-      task_runner->PostDelayedTask(FROM_HERE, ith_task, j);
-      ++expected_task_run_counts[i];
-    }
-  }
-  this->delegate_.StopTaskRunner();
-
-  EXPECT_EQ(expected_task_run_counts,
-            this->task_tracker_->GetTaskRunCounts());
-}
-
-namespace internal {
-
-// Calls RunsTasksOnCurrentThread() on |task_runner| and expects it to
-// equal |expected_value|.
-void ExpectRunsTasksOnCurrentThread(
-    bool expected_value,
-    const scoped_refptr<TaskRunner>& task_runner);
-
-}  // namespace internal
-
-// Post a bunch of tasks to the task runner as well as to a separate
-// thread, each checking the value of RunsTasksOnCurrentThread(),
-// which should return true for the tasks posted on the task runner
-// and false for the tasks posted on the separate thread.
-TYPED_TEST_P(TaskRunnerTest, RunsTasksOnCurrentThread) {
-  std::map<int, int> expected_task_run_counts;
-
-  Thread thread("Non-task-runner thread");
-  ASSERT_TRUE(thread.Start());
-  this->delegate_.StartTaskRunner();
-
-  scoped_refptr<TaskRunner> task_runner = this->delegate_.GetTaskRunner();
-  // Post each ith task i+1 times on the task runner and i+1 times on
-  // the non-task-runner thread.
-  for (int i = 0; i < 20; ++i) {
-    const Closure& ith_task_runner_task =
-        this->task_tracker_->WrapTask(
-            Bind(&internal::ExpectRunsTasksOnCurrentThread,
-                 true, task_runner),
-            i);
-    const Closure& ith_non_task_runner_task =
-        this->task_tracker_->WrapTask(
-            Bind(&internal::ExpectRunsTasksOnCurrentThread,
-                 false, task_runner),
-            i);
-    for (int j = 0; j < i + 1; ++j) {
-      task_runner->PostTask(FROM_HERE, ith_task_runner_task);
-      thread.message_loop()->PostTask(FROM_HERE, ith_non_task_runner_task);
-      expected_task_run_counts[i] += 2;
-    }
-  }
-
-  this->delegate_.StopTaskRunner();
-  thread.Stop();
-
-  EXPECT_EQ(expected_task_run_counts,
-            this->task_tracker_->GetTaskRunCounts());
-}
-
-REGISTER_TYPED_TEST_CASE_P(
-    TaskRunnerTest, Basic, Delayed, RunsTasksOnCurrentThread);
-
-}  // namespace base
-
-#endif  //#define BASE_TASK_RUNNER_TEST_TEMPLATE_H_