libs/signals2/test/signal_test.cpp
// Boost.Signals library
// Copyright Frank Mori Hess 2008-2009.
// Copyright Douglas Gregor 2001-2003.
//
// Use, modification and
// distribution is subject to 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)
// For more information, see http://www.boost.org
#include <boost/bind/bind.hpp>
#include <boost/optional.hpp>
#include <boost/signals2.hpp>
#define BOOST_TEST_MODULE signal_test
#include <boost/test/included/unit_test.hpp>
#include <functional>
#include <iostream>
#include <typeinfo>
using namespace boost::placeholders;
template<typename T>
struct max_or_default {
typedef T result_type;
template<typename InputIterator>
typename InputIterator::value_type
operator()(InputIterator first, InputIterator last) const
{
boost::optional<T> max;
for (; first != last; ++first)
{
try
{
if(!max) max = *first;
else max = (*first > max.get())? *first : max;
}
catch(const boost::bad_weak_ptr &)
{}
}
if(max) return max.get();
return T();
}
};
struct make_int {
make_int(int n, int cn) : N(n), CN(cn) {}
int operator()() { return N; }
int operator()() const { return CN; }
int N;
int CN;
};
template<int N>
struct make_increasing_int {
make_increasing_int() : n(N) {}
int operator()() const { return n++; }
mutable int n;
};
static void
test_zero_args()
{
make_int i42(42, 41);
make_int i2(2, 1);
make_int i72(72, 71);
make_int i63(63, 63);
make_int i62(62, 61);
{
boost::signals2::signal<int (), max_or_default<int> > s0;
std::cout << "sizeof(signal) = " << sizeof(s0) << std::endl;
boost::signals2::connection c2 = s0.connect(i2);
boost::signals2::connection c72 = s0.connect(72, i72);
boost::signals2::connection c62 = s0.connect(60, i62);
boost::signals2::connection c42 = s0.connect(i42);
BOOST_CHECK(s0() == 72);
s0.disconnect(72);
BOOST_CHECK(s0() == 62);
c72.disconnect(); // Double-disconnect should be safe
BOOST_CHECK(s0() == 62);
s0.disconnect(72); // Triple-disconect should be safe
BOOST_CHECK(s0() == 62);
// Also connect 63 in the same group as 62
s0.connect(60, i63);
BOOST_CHECK(s0() == 63);
// Disconnect all of the 60's
s0.disconnect(60);
BOOST_CHECK(s0() == 42);
c42.disconnect();
BOOST_CHECK(s0() == 2);
c2.disconnect();
BOOST_CHECK(s0() == 0);
}
{
boost::signals2::signal<int (), max_or_default<int> > s0;
boost::signals2::connection c2 = s0.connect(i2);
boost::signals2::connection c72 = s0.connect(i72);
boost::signals2::connection c62 = s0.connect(i62);
boost::signals2::connection c42 = s0.connect(i42);
const boost::signals2::signal<int (), max_or_default<int> >& cs0 = s0;
BOOST_CHECK(cs0() == 72);
}
{
make_increasing_int<7> i7;
make_increasing_int<10> i10;
boost::signals2::signal<int (), max_or_default<int> > s0;
boost::signals2::connection c7 = s0.connect(i7);
boost::signals2::connection c10 = s0.connect(i10);
BOOST_CHECK(s0() == 10);
BOOST_CHECK(s0() == 11);
}
}
static void
test_one_arg()
{
boost::signals2::signal<int (int value), max_or_default<int> > s1;
s1.connect(std::negate<int>());
s1.connect(boost::bind(std::multiplies<int>(), 2, _1));
BOOST_CHECK(s1(1) == 2);
BOOST_CHECK(s1(-1) == 1);
}
static void
test_signal_signal_connect()
{
typedef boost::signals2::signal<int (int value), max_or_default<int> > signal_type;
signal_type s1;
s1.connect(std::negate<int>());
BOOST_CHECK(s1(3) == -3);
{
signal_type s2;
s1.connect(s2);
s2.connect(boost::bind(std::multiplies<int>(), 2, _1));
s2.connect(boost::bind(std::multiplies<int>(), -3, _1));
BOOST_CHECK(s2(-3) == 9);
BOOST_CHECK(s1(3) == 6);
} // s2 goes out of scope and disconnects
BOOST_CHECK(s1(3) == -3);
}
template<typename ResultType>
ResultType disconnecting_slot(const boost::signals2::connection &conn, int)
{
conn.disconnect();
return ResultType();
}
#ifdef BOOST_NO_VOID_RETURNS
template<>
void disconnecting_slot<void>(const boost::signals2::connection &conn, int)
{
conn.disconnect();
return;
}
#endif
template<typename ResultType>
void test_extended_slot()
{
{
typedef boost::signals2::signal<ResultType (int)> signal_type;
typedef typename signal_type::extended_slot_type slot_type;
signal_type sig;
// attempting to work around msvc 7.1 bug by explicitly assigning to a function pointer
ResultType (*fp)(const boost::signals2::connection &conn, int) = &disconnecting_slot<ResultType>;
slot_type myslot(fp);
sig.connect_extended(myslot);
BOOST_CHECK(sig.num_slots() == 1);
sig(0);
BOOST_CHECK(sig.num_slots() == 0);
}
{ // test 0 arg signal
typedef boost::signals2::signal<ResultType ()> signal_type;
typedef typename signal_type::extended_slot_type slot_type;
signal_type sig;
// attempting to work around msvc 7.1 bug by explicitly assigning to a function pointer
ResultType (*fp)(const boost::signals2::connection &conn, int) = &disconnecting_slot<ResultType>;
slot_type myslot(fp, _1, 0);
sig.connect_extended(myslot);
BOOST_CHECK(sig.num_slots() == 1);
sig();
BOOST_CHECK(sig.num_slots() == 0);
}
// test disconnection by slot
{
typedef boost::signals2::signal<ResultType (int)> signal_type;
typedef typename signal_type::extended_slot_type slot_type;
signal_type sig;
// attempting to work around msvc 7.1 bug by explicitly assigning to a function pointer
ResultType (*fp)(const boost::signals2::connection &conn, int) = &disconnecting_slot<ResultType>;
slot_type myslot(fp);
sig.connect_extended(myslot);
BOOST_CHECK(sig.num_slots() == 1);
sig.disconnect(fp);
BOOST_CHECK(sig.num_slots() == 0);
}
}
void increment_arg(int &value)
{
++value;
}
static void
test_reference_args()
{
typedef boost::signals2::signal<void (int &)> signal_type;
signal_type s1;
s1.connect(&increment_arg);
int value = 0;
s1(value);
BOOST_CHECK(value == 1);
}
static void
test_typedefs_etc()
{
typedef boost::signals2::signal<int (double, long)> signal_type;
typedef signal_type::slot_type slot_type;
BOOST_CHECK(typeid(signal_type::slot_result_type) == typeid(int));
BOOST_CHECK(typeid(signal_type::result_type) == typeid(boost::optional<int>));
BOOST_CHECK(typeid(signal_type::arg<0>::type) == typeid(double));
BOOST_CHECK(typeid(signal_type::arg<1>::type) == typeid(long));
BOOST_CHECK(typeid(signal_type::arg<0>::type) == typeid(signal_type::first_argument_type));
BOOST_CHECK(typeid(signal_type::arg<1>::type) == typeid(signal_type::second_argument_type));
BOOST_CHECK(typeid(signal_type::signature_type) == typeid(int (double, long)));
BOOST_CHECK(signal_type::arity == 2);
BOOST_CHECK(typeid(slot_type::result_type) == typeid(signal_type::slot_result_type));
BOOST_CHECK(typeid(slot_type::arg<0>::type) == typeid(signal_type::arg<0>::type));
BOOST_CHECK(typeid(slot_type::arg<1>::type) == typeid(signal_type::arg<1>::type));
BOOST_CHECK(typeid(slot_type::arg<0>::type) == typeid(slot_type::first_argument_type));
BOOST_CHECK(typeid(slot_type::arg<1>::type) == typeid(slot_type::second_argument_type));
BOOST_CHECK(typeid(slot_type::signature_type) == typeid(signal_type::signature_type));
BOOST_CHECK(slot_type::arity == signal_type::arity);
typedef boost::signals2::signal<void (short)> unary_signal_type;
BOOST_CHECK(typeid(unary_signal_type::slot_result_type) == typeid(void));
BOOST_CHECK(typeid(unary_signal_type::argument_type) == typeid(short));
BOOST_CHECK(typeid(unary_signal_type::slot_type::argument_type) == typeid(short));
}
class dummy_combiner
{
public:
typedef int result_type;
dummy_combiner(result_type return_value): _return_value(return_value)
{}
template<typename SlotIterator>
result_type operator()(SlotIterator, SlotIterator)
{
return _return_value;
}
private:
result_type _return_value;
};
static void
test_set_combiner()
{
typedef boost::signals2::signal<int (), dummy_combiner> signal_type;
signal_type sig(dummy_combiner(0));
BOOST_CHECK(sig() == 0);
BOOST_CHECK(sig.combiner()(0,0) == 0);
sig.set_combiner(dummy_combiner(1));
BOOST_CHECK(sig() == 1);
BOOST_CHECK(sig.combiner()(0,0) == 1);
}
static void
test_swap()
{
typedef boost::signals2::signal<int (), dummy_combiner> signal_type;
signal_type sig1(dummy_combiner(1));
BOOST_CHECK(sig1() == 1);
signal_type sig2(dummy_combiner(2));
BOOST_CHECK(sig2() == 2);
sig1.swap(sig2);
BOOST_CHECK(sig1() == 2);
BOOST_CHECK(sig2() == 1);
using std::swap;
swap(sig1, sig2);
BOOST_CHECK(sig1() == 1);
BOOST_CHECK(sig2() == 2);
}
void test_move()
{
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
typedef boost::signals2::signal<int (), dummy_combiner> signal_type;
signal_type sig1(dummy_combiner(1));
BOOST_CHECK(sig1() == 1);
signal_type sig2(dummy_combiner(2));
BOOST_CHECK(sig2() == 2);
sig1 = std::move(sig2);
BOOST_CHECK(sig1() == 2);
signal_type sig3(std::move(sig1));
BOOST_CHECK(sig3() == 2);
#endif // !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
}
BOOST_AUTO_TEST_CASE(test_main)
{
test_zero_args();
test_one_arg();
test_signal_signal_connect();
test_extended_slot<void>();
test_extended_slot<int>();
test_reference_args();
test_typedefs_etc();
test_set_combiner();
test_swap();
test_move();
}