Tools/TestWebKitAPI/Tests/WTF/RunLoop.cpp

/*
 * Copyright (C) 2015 Apple Inc. All rights reserved.
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 * 1. Redistributions of source code must retain the above copyright
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#include "config.h"

#include "Utilities.h"
#include <wtf/RunLoop.h>
#include <wtf/Threading.h>

namespace TestWebKitAPI {

static bool testFinished;
static int count = 100;

TEST(WTF_RunLoop, Deadlock)
{
    WTF::initializeMainThread();

    struct DispatchFromDestructorTester {
        ~DispatchFromDestructorTester() {
            RunLoop::main().dispatch([] {
                if (!(--count))
                    testFinished = true;
            });
        }
    };

    for (int i = 0; i < count; ++i) {
        auto capture = std::make_shared<DispatchFromDestructorTester>();
        RunLoop::main().dispatch([capture] { });
    }

    Util::run(&testFinished);
}

class DerivedOneShotTimer : public RunLoop::Timer<DerivedOneShotTimer> {
public:
    DerivedOneShotTimer(bool& testFinished)
        : RunLoop::Timer<DerivedOneShotTimer>(RunLoop::current(), this, &DerivedOneShotTimer::fired)
        , m_testFinished(testFinished)
    {
    }

    void fired()
    {
        EXPECT_FALSE(isActive());
        EXPECT_EQ(secondsUntilFire(), Seconds(0));

        m_testFinished = true;
        stop();
    }

private:
    bool& m_testFinished;
};


TEST(WTF_RunLoop, OneShotTimer)
{
    WTF::initializeMainThread();

    bool testFinished = false;
    DerivedOneShotTimer timer(testFinished);
    timer.startOneShot(100_ms);
    Util::run(&testFinished);
}

class DerivedRepeatingTimer : public RunLoop::Timer<DerivedRepeatingTimer> {
public:
    DerivedRepeatingTimer(bool& testFinished)
        : RunLoop::Timer<DerivedRepeatingTimer>(RunLoop::current(), this, &DerivedRepeatingTimer::fired)
        , m_testFinished(testFinished)
    {
    }

    void fired()
    {
        EXPECT_TRUE(isActive());

        if (++m_count == 10) {
            m_testFinished = true;
            stop();

            EXPECT_FALSE(isActive());
            EXPECT_EQ(secondsUntilFire(), Seconds(0));
        }
    }

private:
    unsigned m_count { 0 };
    bool& m_testFinished;
};


TEST(WTF_RunLoop, RepeatingTimer)
{
    WTF::initializeMainThread();

    bool testFinished = false;
    DerivedRepeatingTimer timer(testFinished);
    timer.startRepeating(10_ms);
    Util::run(&testFinished);
    ASSERT_FALSE(timer.isActive());
}

TEST(WTF_RunLoop, ManyTimes)
{
    class Counter {
    public:
        void run()
        {
            if (++m_count == 100000) {
                RunLoop::current().stop();
                return;
            }
            RunLoop::current().dispatch([this] {
                run();
            });
        }

    private:
        unsigned m_count { 0 };
    };

    Thread::create("RunLoopManyTimes", [] {
        Counter counter;
        RunLoop::current().dispatch([&counter] {
            counter.run();
        });
        RunLoop::run();
    })->waitForCompletion();
}

} // namespace TestWebKitAPI