// config_file_test.cpp
//

#include <boost/test/unit_test.hpp>
#include <boost/program_options.hpp>

#include <fstream>
#include <stdexcept>

using namespace std;
using namespace boost::program_options;

BOOST_AUTO_TEST_SUITE( Config_File_Test_Suite )

	BOOST_AUTO_TEST_CASE( Config_File_With_Single_Option )
	{
		// Step 1: test fixture setup
		options_description configOptions( "Configuration" );

		configOptions.add_options()
				( "option1", value<string>() )
				( "option2", value<string>() )
				;

		variables_map variablesMap;

		ifstream configFile( "config_file_1" );

		BOOST_REQUIRE( configFile );

		// nothrow ( 'section2.option' doesn't exist in config file )
		store( parse_config_file( configFile, configOptions ),
				variablesMap
				);

		// Step 2: call SUT
		// &&
		// Step 3: result check
		variablesMap[ "option1" ].as<string>();

		BOOST_CHECK_THROW( variablesMap[ "option2" ].as<string>(),
							bad_cast
							);

		// Step 4: test fixture cleanup
	}

	BOOST_AUTO_TEST_CASE( Config_File_With_Two_Options )
	{
		// Step 1: test fixture setup
		options_description configOptions( "Configuration" );

		configOptions.add_options()
				( "option1", value<string>() )
				;

		variables_map variablesMap;

		ifstream configFile( "config_file_2" );

		BOOST_REQUIRE( configFile );

		// Step 2: call SUT
		// &&
		// Step 3: result check
		// ( 'section2.option' doesn't exist in 'options_description' )
		BOOST_CHECK_THROW( parse_config_file( configFile, configOptions ),
							logic_error
							);

		// Step 4: test fixture cleanup
	}

BOOST_AUTO_TEST_SUITE_END()