leaf/test/handle_all_test.cpp

//Copyright (c) 2018 Emil Dotchevski
//Copyright (c) 2018 Second Spectrum, Inc.

//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)

#include <boost/leaf/handle.hpp>
#include "boost/core/lightweight_test.hpp"

namespace leaf = boost::leaf;

template <int> struct info { int value; };

enum class error_codes
{
	ok,
	error1,
	error2,
	error3
};
namespace boost { namespace leaf {
	template <> struct is_error_type<error_codes>: std::true_type { };
} }

struct error_codes_ { error_codes value; };

template <class R>
leaf::result<R> f( error_codes ec )
{
	if( ec==error_codes::ok )
		return R(42);
	else
		return leaf::error(ec,error_codes_{ec},info<1>{1},info<2>{2},info<3>{3});
}

int main()
{
	//void, handle_all (success)
	{
		int c=0;
		leaf::handle_all(
			[&c]() -> leaf::result<void>
			{
				LEAF_AUTO(answer, f<int>(error_codes::ok));
				c = answer;
				return { };
			},
			[&c]
			{
				BOOST_TEST(c==0);
				c = 1;
			} );
		BOOST_TEST(c==42);
	}

	//void, handle_all (failure)
	{
		int c=0;
		leaf::handle_all(
			[&c]() -> leaf::result<void>
			{
				LEAF_AUTO(answer, f<int>(error_codes::error1));
				c = answer;
				return { };
			},
			[&c]( error_codes ec, info<1> const & x, info<2> y )
			{
				BOOST_TEST(ec==error_codes::error1);
				BOOST_TEST(x.value==1);
				BOOST_TEST(y.value==2);
				BOOST_TEST(c==0);
				c = 1;
			},
			[&c]()
			{
				BOOST_TEST(c==0);
				c = 2;
			} );
		BOOST_TEST(c==1);
	}

	//void, handle_all (failure), match enum (single enum value)
	{
		int c=0;
		leaf::handle_all(
			[&c]() -> leaf::result<void>
			{
				LEAF_AUTO(answer, f<int>(error_codes::error1));
				c = answer;
				return { };
			},
			[&c]( leaf::match<error_codes,error_codes::error2> )
			{
				BOOST_TEST(c==0);
				c = 1;
			},
			[&c]( leaf::match<error_codes,error_codes::error1> ec, info<1> const & x, info<2> y )
			{
				BOOST_TEST(ec.value==error_codes::error1);
				BOOST_TEST(x.value==1);
				BOOST_TEST(y.value==2);
				BOOST_TEST(c==0);
				c = 2;
			},
			[&c]()
			{
				BOOST_TEST(c==0);
				c = 3;
			} );
		BOOST_TEST(c==2);
	}

	//void, handle_all (failure), match enum (multiple enum values)
	{
		int c=0;
		leaf::handle_all(
			[&c]() -> leaf::result<void>
			{
				LEAF_AUTO(answer, f<int>(error_codes::error1));
				c = answer;
				return { };
			},
			[&c]( leaf::match<error_codes,error_codes::error2> )
			{
				BOOST_TEST(c==0);
				c = 1;
			},
			[&c]( leaf::match<error_codes,error_codes::error2,error_codes::error1> ec, info<1> const & x, info<2> y )
			{
				BOOST_TEST(ec.value==error_codes::error1);
				BOOST_TEST(x.value==1);
				BOOST_TEST(y.value==2);
				BOOST_TEST(c==0);
				c = 2;
			},
			[&c]()
			{
				BOOST_TEST(c==0);
				c = 3;
			} );
		BOOST_TEST(c==2);
	}

	//void, handle_all (failure), match value (single value)
	{
		int c=0;
		leaf::handle_all(
			[&c]() -> leaf::result<void>
			{
				LEAF_AUTO(answer, f<int>(error_codes::error1));
				c = answer;
				return { };
			},
			[&c]( leaf::match<error_codes_,error_codes::error2> )
			{
				BOOST_TEST(c==0);
				c = 1;
			},
			[&c]( leaf::match<error_codes_,error_codes::error1> ec, info<1> const & x, info<2> y )
			{
				BOOST_TEST(ec.value==error_codes::error1);
				BOOST_TEST(x.value==1);
				BOOST_TEST(y.value==2);
				BOOST_TEST(c==0);
				c = 2;
			},
			[&c]()
			{
				BOOST_TEST(c==0);
				c = 3;
			} );
		BOOST_TEST(c==2);
	}

	//void, handle_all (failure), match value (multiple values)
	{
		int c=0;
		leaf::handle_all(
			[&c]() -> leaf::result<void>
			{
				LEAF_AUTO(answer, f<int>(error_codes::error1));
				c = answer;
				return { };
			},
			[&c]( leaf::match<error_codes_,error_codes::error2> )
			{
				BOOST_TEST(c==0);
				c = 1;
			},
			[&c]( leaf::match<error_codes_,error_codes::error2,error_codes::error1> ec, info<1> const & x, info<2> y )
			{
				BOOST_TEST(ec.value==error_codes::error1);
				BOOST_TEST(x.value==1);
				BOOST_TEST(y.value==2);
				BOOST_TEST(c==0);
				c = 2;
			},
			[&c]()
			{
				BOOST_TEST(c==0);
				c = 3;
			} );
		BOOST_TEST(c==2);
	}

	//////////////////////////////////////

	//int, handle_all (success)
	{
		int r = leaf::handle_all(
			[ ]() -> leaf::result<int>
			{
				LEAF_AUTO(answer, f<int>(error_codes::ok));
				return answer;
			},
			[ ]
			{
				return 1;
			} );
		BOOST_TEST(r==42);
	}

	//int, handle_all (failure)
	{
		int r = leaf::handle_all(
			[ ]() -> leaf::result<int>
			{
				LEAF_AUTO(answer, f<int>(error_codes::error1));
				return answer;
			},
			[ ]( error_codes ec, info<1> const & x, info<2> y )
			{
				BOOST_TEST(ec==error_codes::error1);
				BOOST_TEST(x.value==1);
				BOOST_TEST(y.value==2);
				return 1;
			},
			[ ]
			{
				return 2;
			} );
		BOOST_TEST(r==1);
	}

	//int, handle_all (failure), match enum (single enum value)
	{
		int r = leaf::handle_all(
			[ ]() -> leaf::result<int>
			{
				LEAF_AUTO(answer, f<int>(error_codes::error1));
				return answer;
			},
			[ ]( leaf::match<error_codes,error_codes::error2> )
			{
				return 1;
			},
			[ ]( leaf::match<error_codes,error_codes::error1> ec, info<1> const & x, info<2> y )
			{
				BOOST_TEST(ec.value==error_codes::error1);
				BOOST_TEST(x.value==1);
				BOOST_TEST(y.value==2);
				return 2;
			},
			[ ]
			{
				return 3;
			} );
		BOOST_TEST(r==2);
	}

	//int, handle_all (failure), match enum (multiple enum values)
	{
		int r = leaf::handle_all(
			[ ]() -> leaf::result<int>
			{
				LEAF_AUTO(answer, f<int>(error_codes::error1));
				return answer;
			},
			[ ]( leaf::match<error_codes,error_codes::error2> )
			{
				return 1;
			},
			[ ]( leaf::match<error_codes,error_codes::error2,error_codes::error1> ec, info<1> const & x, info<2> y )
			{
				BOOST_TEST(ec.value==error_codes::error1);
				BOOST_TEST(x.value==1);
				BOOST_TEST(y.value==2);
				return 2;
			},
			[ ]
			{
				return 3;
			} );
		BOOST_TEST(r==2);
	}

	//int, handle_all (failure), match value (single value)
	{
		int r = leaf::handle_all(
			[ ]() -> leaf::result<int>
			{
				LEAF_AUTO(answer, f<int>(error_codes::error1));
				return answer;
			},
			[ ]( leaf::match<error_codes_,error_codes::error2> )
			{
				return 1;
			},
			[ ]( leaf::match<error_codes_,error_codes::error1> ec, info<1> const & x, info<2> y )
			{
				BOOST_TEST(ec.value==error_codes::error1);
				BOOST_TEST(x.value==1);
				BOOST_TEST(y.value==2);
				return 2;
			},
			[ ]
			{
				return 3;
			} );
		BOOST_TEST(r==2);
	}

	//int, handle_all (failure), match value (multiple values)
	{
		int r = leaf::handle_all(
			[ ]() -> leaf::result<int>
			{
				LEAF_AUTO(answer, f<int>(error_codes::error1));
				return answer;
			},
			[ ]( leaf::match<error_codes_,error_codes::error2> )
			{
				return 1;
			},
			[ ]( leaf::match<error_codes_,error_codes::error2,error_codes::error1> ec, info<1> const & x, info<2> y )
			{
				BOOST_TEST(ec.value==error_codes::error1);
				BOOST_TEST(x.value==1);
				BOOST_TEST(y.value==2);
				return 2;
			},
			[ ]
			{
				return 3;
			} );
		BOOST_TEST(r==2);
	}

	return boost::report_errors();
}