Remove base::mac::LibDispatchTaskRunner and migrate its sole client to plain libdispatch.

base/mac/libdispatch_task_runner_unittest.cc

-// 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.
-
-#include "base/mac/libdispatch_task_runner.h"
-
-#include <stddef.h>
-
-#include "base/bind.h"
-#include "base/mac/bind_objc_block.h"
-#include "base/macros.h"
-#include "base/message_loop/message_loop.h"
-#include "base/run_loop.h"
-#include "base/single_thread_task_runner.h"
-#include "base/strings/stringprintf.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-class LibDispatchTaskRunnerTest : public testing::Test {
- public:
-  void SetUp() override {
-    task_runner_ = new base::mac::LibDispatchTaskRunner(
-        "org.chromium.LibDispatchTaskRunnerTest");
-  }
-
-  // DispatchLastTask is used to run the main test thread's MessageLoop until
-  // all non-delayed tasks are run on the LibDispatchTaskRunner.
-  void DispatchLastTask() {
-    dispatch_async(task_runner_->GetDispatchQueue(), ^{
-      message_loop_.task_runner()->PostTask(
-          FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
-    });
-    base::RunLoop().Run();
-    task_runner_->Shutdown();
-  }
-
-  // VerifyTaskOrder takes the expectations from TaskOrderMarkers and compares
-  // them against the recorded values.
-  void VerifyTaskOrder(const char* const expectations[],
-                       size_t num_expectations) {
-    size_t actual_size = task_order_.size();
-
-    for (size_t i = 0; i < num_expectations; ++i) {
-      if (i >= actual_size) {
-        EXPECT_LE(i, actual_size) << "Expected " << expectations[i];
-        continue;
-      }
-
-      EXPECT_EQ(expectations[i], task_order_[i]);
-    }
-
-    if (actual_size > num_expectations) {
-      EXPECT_LE(actual_size, num_expectations) << "Extra tasks were run:";
-      for (size_t i = num_expectations; i < actual_size; ++i) {
-        EXPECT_EQ("<none>", task_order_[i]) << " (i=" << i << ")";
-      }
-    }
-  }
-
-  // The message loop for the test main thread.
-  base::MessageLoop message_loop_;
-
-  // The task runner under test.
-  scoped_refptr<base::mac::LibDispatchTaskRunner> task_runner_;
-
-  // Vector that records data from TaskOrderMarker.
-  std::vector<std::string> task_order_;
-};
-
-// Scoper that records the beginning and end of a running task.
-class TaskOrderMarker {
- public:
-  TaskOrderMarker(LibDispatchTaskRunnerTest* test, const std::string& name)
-      : test_(test),
-        name_(name) {
-    test->task_order_.push_back(std::string("BEGIN ") + name);
-  }
-  ~TaskOrderMarker() {
-    test_->task_order_.push_back(std::string("END ") + name_);
-  }
-
- private:
-  LibDispatchTaskRunnerTest* test_;
-  std::string name_;
-};
-
-void RecordTaskOrder(LibDispatchTaskRunnerTest* test, const std::string& name) {
-  TaskOrderMarker marker(test, name);
-}
-
-// Returns a closure that records the task order.
-base::Closure BoundRecordTaskOrder(LibDispatchTaskRunnerTest* test,
-                                   const std::string& name) {
-  return base::Bind(&RecordTaskOrder, base::Unretained(test), name);
-}
-
-TEST_F(LibDispatchTaskRunnerTest, PostTask) {
-  task_runner_->PostTask(FROM_HERE, BoundRecordTaskOrder(this, "Basic Task"));
-  DispatchLastTask();
-  const char* const expectations[] = {
-    "BEGIN Basic Task",
-    "END Basic Task"
-  };
-  VerifyTaskOrder(expectations, arraysize(expectations));
-}
-
-TEST_F(LibDispatchTaskRunnerTest, PostTaskWithinTask) {
-  task_runner_->PostTask(FROM_HERE, base::BindBlock(^{
-      TaskOrderMarker marker(this, "Outer");
-      task_runner_->PostTask(FROM_HERE, BoundRecordTaskOrder(this, "Inner"));
-  }));
-  DispatchLastTask();
-
-  const char* const expectations[] = {
-    "BEGIN Outer",
-    "END Outer",
-    "BEGIN Inner",
-    "END Inner"
-  };
-  VerifyTaskOrder(expectations, arraysize(expectations));
-}
-
-TEST_F(LibDispatchTaskRunnerTest, NoMessageLoop) {
-  task_runner_->PostTask(FROM_HERE, base::BindBlock(^{
-      TaskOrderMarker marker(this,
-          base::StringPrintf("MessageLoop = %p", base::MessageLoop::current()));
-  }));
-  DispatchLastTask();
-
-  const char* const expectations[] = {
-    "BEGIN MessageLoop = 0x0",
-    "END MessageLoop = 0x0"
-  };
-  VerifyTaskOrder(expectations, arraysize(expectations));
-}
-
-TEST_F(LibDispatchTaskRunnerTest, DispatchAndPostTasks) {
-  dispatch_async(task_runner_->GetDispatchQueue(), ^{
-      TaskOrderMarker marker(this, "First Block");
-  });
-  task_runner_->PostTask(FROM_HERE, BoundRecordTaskOrder(this, "First Task"));
-  dispatch_async(task_runner_->GetDispatchQueue(), ^{
-      TaskOrderMarker marker(this, "Second Block");
-  });
-  task_runner_->PostTask(FROM_HERE, BoundRecordTaskOrder(this, "Second Task"));
-  DispatchLastTask();
-
-  const char* const expectations[] = {
-    "BEGIN First Block",
-    "END First Block",
-    "BEGIN First Task",
-    "END First Task",
-    "BEGIN Second Block",
-    "END Second Block",
-    "BEGIN Second Task",
-    "END Second Task",
-  };
-  VerifyTaskOrder(expectations, arraysize(expectations));
-}
-
-TEST_F(LibDispatchTaskRunnerTest, NonNestable) {
-  task_runner_->PostTask(FROM_HERE, base::BindBlock(^{
-      TaskOrderMarker marker(this, "First");
-      task_runner_->PostNonNestableTask(FROM_HERE, base::BindBlock(^{
-          TaskOrderMarker marker(this, "Second NonNestable");
-          message_loop_.task_runner()->PostTask(
-              FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
-      }));
-  }));
-  base::RunLoop().Run();
-  task_runner_->Shutdown();
-
-  const char* const expectations[] = {
-    "BEGIN First",
-    "END First",
-    "BEGIN Second NonNestable",
-    "END Second NonNestable"
-  };
-  VerifyTaskOrder(expectations, arraysize(expectations));
-}
-
-TEST_F(LibDispatchTaskRunnerTest, PostDelayed) {
-  base::TimeTicks post_time;
-  __block base::TimeTicks run_time;
-  const base::TimeDelta delta = base::TimeDelta::FromMilliseconds(50);
-
-  task_runner_->PostTask(FROM_HERE, BoundRecordTaskOrder(this, "First"));
-  post_time = base::TimeTicks::Now();
-  task_runner_->PostDelayedTask(FROM_HERE, base::BindBlock(^{
-      TaskOrderMarker marker(this, "Timed");
-      run_time = base::TimeTicks::Now();
-      message_loop_.task_runner()->PostTask(
-          FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
-  }), delta);
-  task_runner_->PostTask(FROM_HERE, BoundRecordTaskOrder(this, "Second"));
-  base::RunLoop().Run();
-  task_runner_->Shutdown();
-
-  const char* const expectations[] = {
-    "BEGIN First",
-    "END First",
-    "BEGIN Second",
-    "END Second",
-    "BEGIN Timed",
-    "END Timed",
-  };
-  VerifyTaskOrder(expectations, arraysize(expectations));
-
-  EXPECT_GE(run_time, post_time + delta);
-}
-
-TEST_F(LibDispatchTaskRunnerTest, PostAfterShutdown) {
-  EXPECT_TRUE(task_runner_->PostTask(FROM_HERE,
-      BoundRecordTaskOrder(this, "First")));
-  EXPECT_TRUE(task_runner_->PostTask(FROM_HERE,
-      BoundRecordTaskOrder(this, "Second")));
-  task_runner_->Shutdown();
-  EXPECT_FALSE(task_runner_->PostTask(FROM_HERE, base::BindBlock(^{
-      TaskOrderMarker marker(this, "Not Run");
-      ADD_FAILURE() << "Should not run a task after Shutdown";
-  })));
-
-  const char* const expectations[] = {
-    "BEGIN First",
-    "END First",
-    "BEGIN Second",
-    "END Second"
-  };
-  VerifyTaskOrder(expectations, arraysize(expectations));
-}