#
# renames the file if it is different from its destination
include(CMakeParseArguments)
#
macro(replace_if_different SOURCE DST)
	set(extra_macro_args ${ARGN})
	set(options CREATE)
	set(one_value_args)
	set(multi_value_args)
	cmake_parse_arguments(REPLACE_IF_DIFFERENT "${options}" "${one_value_args}" "${multi_value_args}" "${extra_macro_args}")

	if (REPLACE_IF_DIFFERENT_CREATE AND (NOT (EXISTS "${DST}")))
		file(WRITE "${DST}" "")
	endif()

	execute_process(COMMAND ${CMAKE_COMMAND} -E compare_files "${SOURCE}" "${DST}" RESULT_VARIABLE DIFFERENT)

	if (DIFFERENT)
		execute_process(COMMAND ${CMAKE_COMMAND} -E rename "${SOURCE}" "${DST}")
	else()
		execute_process(COMMAND ${CMAKE_COMMAND} -E remove "${SOURCE}")
	endif()
endmacro()

macro(eth_add_test NAME) 

	# parse arguments here
	set(commands)
	set(current_command "")
	foreach (arg ${ARGN})
		if (arg STREQUAL "ARGS")
			if (current_command)
				list(APPEND commands ${current_command})
			endif()
			set(current_command "")
		else ()
			set(current_command "${current_command} ${arg}")
		endif()
	endforeach(arg)
	list(APPEND commands ${current_command})

	message(STATUS "test: ${NAME} | ${commands}")

	# create tests
	set(index 0)
	list(LENGTH commands count)
	while (index LESS count)
		list(GET commands ${index} test_arguments)

		set(run_test "--run_test=${NAME}")
		add_test(NAME "${NAME}.${index}" COMMAND testeth ${run_test} ${test_arguments})
		
		math(EXPR index "${index} + 1")
	endwhile(index LESS count)

	# add target to run them
	add_custom_target("test.${NAME}"
		DEPENDS testeth
		WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
		COMMAND ${CMAKE_COMMAND} -DETH_TEST_NAME="${NAME}" -DCTEST_COMMAND="${CTEST_COMMAND}" -P "${ETH_SCRIPTS_DIR}/runtest.cmake"
	)

endmacro()