// http://turtle.sourceforge.net
//
// Copyright Mathieu Champlon 2014
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

//[ async_call_problem
namespace {
class base_class
{
public:
    virtual void method() = 0;
};

class my_class
{
public:
    explicit my_class(base_class&);

    void flush(); // repetitively calling this method will in turn call base_class::method at some point
};
} // namespace
//]

//[ async_call_solution
#define BOOST_AUTO_TEST_MAIN
#include <turtle/mock.hpp>
#include <boost/lambda/lambda.hpp>
#include <boost/test/auto_unit_test.hpp>
#include <boost/thread.hpp>

namespace {
template<typename F>
void check(bool& condition, F flush, int attempts = 100, int sleep = 100)
{
    while(!condition && attempts > 0)
    {
        --attempts;
        boost::this_thread::sleep(boost::posix_time::milliseconds(sleep));
        flush();
    }
}

MOCK_BASE_CLASS(mock_base_class, base_class){ MOCK_METHOD(method, 0) };
void set_bool(bool& b)
{
    b = true;
}
} // namespace

BOOST_AUTO_TEST_CASE(method_is_called)
{
    mock_base_class m;
    my_class c(m);
    bool done = false;
    // when method is called it will set done to true
    // Note: Boost 1.57 introduced a bug preventing usage of the lambda with clang in C++98
    // See: https://svn.boost.org/trac10/ticket/10785
#if defined(BOOST_CLANG) && (BOOST_VERSION >= 105700)
    MOCK_EXPECT(m.method).once().calls(boost::bind(&set_bool, done));
#else
    MOCK_EXPECT(m.method).once().calls(boost::lambda::var(done) = true);
#endif
    check(done, boost::bind(&my_class::flush, &c)); // just wait on done, flushing from time to time
}
//]