Add ability to retrieve a thread_name given a thread_id.

base/threading/thread_id_name_manager_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/threading/thread_id_name_manager.h"
+
+#include "base/threading/platform_thread.h"
+#include "base/threading/thread.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+
+typedef PlatformTest ThreadIdNameManagerTest;
+
+namespace {
+
+TEST_F(ThreadIdNameManagerTest, AddThreads) {
+  base::Thread a("a thread");
+  base::Thread b("b thread");
+
+  a.Start();
+  b.Start();
+
+  base::ThreadIdNameManager* manager = base::ThreadIdNameManager::GetInstance();
+  std::string name;
+
+  EXPECT_TRUE(manager->GetNameForId(a.thread_id(), &name));
+  EXPECT_EQ(name, "a thread");
+
+  EXPECT_TRUE(manager->GetNameForId(b.thread_id(), &name));
+  EXPECT_EQ(name, "b thread");
+
+  b.Stop();
+  a.Stop();
+}
+
+TEST_F(ThreadIdNameManagerTest, NonExistingThread) {
+  base::ThreadIdNameManager* manager = base::ThreadIdNameManager::GetInstance();
+  std::string name;
+  EXPECT_FALSE(manager->GetNameForId(1234, &name));

[jonathan.backer, 2012/12/05 20:06:12]

How do you know that this isn't a valid thread id?

[dsinclair, 2012/12/05 20:40:09]

Good point, removed the test.

+}
+
+TEST_F(ThreadIdNameManagerTest, RemoveThreads) {
+  base::Thread a("a thread");
+  a.Start();
+
+  base::PlatformThreadId b_id;
+  {
+    base::Thread b("b thread");
+    b.Start();
+    b_id = b.thread_id();
+    b.Stop();
+  }
+  a.Stop();
+
+  base::ThreadIdNameManager* manager = base::ThreadIdNameManager::GetInstance();
+  std::string name;
+
+  EXPECT_TRUE(manager->GetNameForId(a.thread_id(), &name));
+  EXPECT_EQ(name, "a thread");
+
+  EXPECT_FALSE(manager->GetNameForId(b_id, &name));
+}
+
+TEST_F(ThreadIdNameManagerTest, RestartThread) {
+  base::ThreadIdNameManager* manager = base::ThreadIdNameManager::GetInstance();
+  std::string name;
+
+  base::Thread a("a thread");
+
+  a.Start();
+  base::PlatformThreadId a_id = a.thread_id();
+
+  a.Stop();
+  EXPECT_TRUE(manager->GetNameForId(a_id, &name));
+  EXPECT_EQ(name, "a thread");
+
+  a.Start();
+  a.Stop();
+  EXPECT_TRUE(manager->GetNameForId(a_id, &name));
+  EXPECT_EQ(name, "a thread");
+}
+
+}  // namespace