cmake_minimum_required (VERSION 2.6)
project (Tutorial)
# The version number.
set (Tutorial_VERSION_MAJOR 1)
set (Tutorial_VERSION_MINOR 0)

# does this sytem provide the log and exp functions?
include (CheckFunctionExists)
check_function_exists (strcmpi HAVE_STRCMPI)
check_function_exists (strcasecmp HAVE_STRCASECMP)

# configure a header file to pass some of the CMake setting
# to the source code
configure_file (
  "${PROJECT_SOURCE_DIR}/TutorialConfig.h.in"
  "${PROJECT_BINARY_DIR}/TutorialConfig.h"
  )

# add the binary tree to the search path for include files
# so that we will find TutorialConfig.h
include_directories ("${PROJECT_BINARY_DIR}")

# should we use our own math functions?
option (USE_MYMATH
        "Use tutorial provided math implementation" ON)

if (USE_MYMATH)
  include_directories ("${PROJECT_SOURCE_DIR}/MathFunctions")
  add_subdirectory (MathFunctions)
  set (EXTRA_LIBS ${EXTRA_LIBS} MathFunctions)
endif (USE_MYMATH)

# add the executable
add_executable (Tutorial tutorial.cxx)
target_link_libraries (Tutorial ${EXTRA_LIBS})

# add the install targets and files
install (TARGETS Tutorial DESTINATION bin)
install (FILES "${PROJECT_BINARY_DIR}/TutorialConfig.h"
         DESTINATION include)

# does the application run
add_test (TutorialRuns Tutorial 25)

# does it sqrt of 25
add_test (TutorialComp25 Tutorial 25)

set_tests_properties (TutorialComp25
  PROPERTIES PASS_REGULAR_EXPRESSION "25 is 5")

# does it handle negative numbers
add_test (TutorialNegative Tutorial -25)
set_tests_properties (TutorialNegative
  PROPERTIES PASS_REGULAR_EXPRESSION "-25 is -nan")

# does it handle small numbers
add_test (TutorialSmall Tutorial 0.0001)
set_tests_properties (TutorialSmall
  PROPERTIES PASS_REGULAR_EXPRESSION "0.0001 is 0.01")

# does the usage message work?
add_test (TutorialUsage Tutorial)
set_tests_properties (TutorialUsage
  PROPERTIES
  PASS_REGULAR_EXPRESSION "Usage:.*number")

#define a macro to simplify adding tests, then use it
macro (do_test arg result)
  add_test (TutorialComp${arg} Tutorial ${arg})
  set_tests_properties (TutorialComp${arg}
    PROPERTIES PASS_REGULAR_EXPRESSION ${result})
endmacro (do_test)

# do a bunch of result based tests
do_test (25 "25 is 5")
do_test (0 "0 is 0")

# enable testing
ENABLE_TESTING()