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//
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// notice, this list of conditions and the following disclaimer.
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// in the documentation and/or other materials provided with the
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#include <vector>

#include "base/call_wrapper.h"
#include "base/scoped_ptr.h"
#include "base/simple_thread.h"
#include "base/string_util.h"
#include "base/waitable_event.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace {

void SetInt(int* p, int x) {
  *p = x;
}

void SignalEvent(base::WaitableEvent* event) {
  EXPECT_FALSE(event->IsSignaled());
  event->Signal();
  EXPECT_TRUE(event->IsSignaled());
}

}  // namespace

TEST(SimpleThreadTest, CreateAndJoin) {
  int stack_int = 0;

  scoped_ptr<base::CallWrapper> wrapper(
      base::NewFunctionCallWrapper(SetInt, &stack_int, 7));
  EXPECT_EQ(0, stack_int);
  scoped_ptr<base::SimpleThread> thread(
      new base::CallWrapperSimpleThread(wrapper.get()));
  EXPECT_FALSE(thread->HasBeenStarted());
  EXPECT_FALSE(thread->HasBeenJoined());
  EXPECT_EQ(0, stack_int);

  thread->Start();
  EXPECT_TRUE(thread->HasBeenStarted());
  EXPECT_FALSE(thread->HasBeenJoined());

  thread->Join();
  EXPECT_TRUE(thread->HasBeenStarted());
  EXPECT_TRUE(thread->HasBeenJoined());
  EXPECT_EQ(7, stack_int);
}

TEST(SimpleThreadTest, WaitForEvent) {
  // Create a thread, and wait for it to signal us.
  base::WaitableEvent event(true, false);

  scoped_ptr<base::CallWrapper> wrapper(
      base::NewFunctionCallWrapper(SignalEvent, &event));
  scoped_ptr<base::SimpleThread> thread(
      new base::CallWrapperSimpleThread(wrapper.get()));

  EXPECT_FALSE(event.IsSignaled());
  thread->Start();
  event.Wait();
  EXPECT_TRUE(event.IsSignaled());
  thread->Join();
}

TEST(SimpleThreadTest, Named) {
  base::WaitableEvent event(true, false);

  base::SimpleThread::Options options;
  scoped_ptr<base::CallWrapper> wrapper(
      base::NewFunctionCallWrapper(SignalEvent, &event));
  scoped_ptr<base::SimpleThread> thread(new base::CallWrapperSimpleThread(
      wrapper.get(), options, "testy"));
  EXPECT_EQ(thread->name_prefix(), "testy");
  EXPECT_FALSE(event.IsSignaled());

  thread->Start();
  EXPECT_EQ(thread->name_prefix(), "testy");
  EXPECT_EQ(thread->name(), std::string("testy/") + IntToString(thread->tid()));
  event.Wait();

  EXPECT_TRUE(event.IsSignaled());
  thread->Join();

  // We keep the name and tid, even after the thread is gone.
  EXPECT_EQ(thread->name_prefix(), "testy");
  EXPECT_EQ(thread->name(), std::string("testy/") + IntToString(thread->tid()));
}