client/base/threading/platform_thread_unittest.cc

/*
  Copyright 2014 Google Inc.

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

#include "base/commandlineflags.h"
#include "base/threading/platform_thread.h"
#include "testing/base/gunit.h"

namespace base {

// Trivial tests that thread runs and doesn't crash on create and join ---------

class TrivialThread : public PlatformThread::Delegate {
 public:
  TrivialThread() : did_run_(false) {}

  virtual void ThreadMain() {
    did_run_ = true;
  }

  bool did_run() const { return did_run_; }

 private:
  bool did_run_;

  DISALLOW_COPY_AND_ASSIGN(TrivialThread);
};

TEST(PlatformThreadTest, Trivial) {
  TrivialThread thread;
  PlatformThreadHandle handle = kNullThreadHandle;

  ASSERT_FALSE(thread.did_run());
  ASSERT_TRUE(PlatformThread::Create(0, &thread, &handle));
  PlatformThread::Join(handle);
  ASSERT_TRUE(thread.did_run());
}

TEST(PlatformThreadTest, TrivialTimesTen) {
  TrivialThread thread[10];
  PlatformThreadHandle handle[arraysize(thread)];

  for (size_t n = 0; n < arraysize(thread); n++)
    ASSERT_FALSE(thread[n].did_run());
  for (size_t n = 0; n < arraysize(thread); n++)
    ASSERT_TRUE(PlatformThread::Create(0, &thread[n], &handle[n]));
  for (size_t n = 0; n < arraysize(thread); n++)
    PlatformThread::Join(handle[n]);
  for (size_t n = 0; n < arraysize(thread); n++)
    ASSERT_TRUE(thread[n].did_run());
}

// Tests of basic thread functions ---------------------------------------------

class FunctionTestThread : public TrivialThread {
 public:
  FunctionTestThread() : thread_id_(0) {}

  virtual void ThreadMain() {
    thread_id_ = PlatformThread::CurrentId();
    PlatformThread::YieldCurrentThread();
    PlatformThread::Sleep(50);

    TrivialThread::ThreadMain();
  }

  PlatformThreadId thread_id() const { return thread_id_; }

 private:
  PlatformThreadId thread_id_;

  DISALLOW_COPY_AND_ASSIGN(FunctionTestThread);
};

TEST(PlatformThreadTest, Function) {
  PlatformThreadId main_thread_id = PlatformThread::CurrentId();

  FunctionTestThread thread;
  PlatformThreadHandle handle = kNullThreadHandle;

  ASSERT_FALSE(thread.did_run());
  ASSERT_TRUE(PlatformThread::Create(0, &thread, &handle));
  PlatformThread::Join(handle);
  ASSERT_TRUE(thread.did_run());
  EXPECT_NE(thread.thread_id(), main_thread_id);
}

TEST(PlatformThreadTest, FunctionTimesTen) {
  PlatformThreadId main_thread_id = PlatformThread::CurrentId();

  FunctionTestThread thread[10];
  PlatformThreadHandle handle[arraysize(thread)];

  for (size_t n = 0; n < arraysize(thread); n++)
    ASSERT_FALSE(thread[n].did_run());
  for (size_t n = 0; n < arraysize(thread); n++)
    ASSERT_TRUE(PlatformThread::Create(0, &thread[n], &handle[n]));
  for (size_t n = 0; n < arraysize(thread); n++)
    PlatformThread::Join(handle[n]);
  for (size_t n = 0; n < arraysize(thread); n++) {
    ASSERT_TRUE(thread[n].did_run());
    EXPECT_NE(thread[n].thread_id(), main_thread_id);
  }
}

}  // namespace base