# runTest.cmake executes a command and captures the output in a file. File is then compared
# against a reference file. Exit status of command can also be compared.
cmake_policy(SET CMP0007 NEW)

# arguments checking
if (NOT TEST_TESTER)
  message (FATAL_ERROR "Require TEST_TESTER to be defined")
endif ()
if (NOT TEST_PROGRAM)
  message (FATAL_ERROR "Require TEST_PROGRAM to be defined")
endif ()
if (NOT TEST_LIBRARY_DIRECTORY)
  message (STATUS "Require TEST_LIBRARY_DIRECTORY to be defined")
endif ()
if (NOT TEST_FOLDER)
  message ( FATAL_ERROR "Require TEST_FOLDER to be defined")
endif ()
if (NOT TEST_OUTPUT)
  message (FATAL_ERROR "Require TEST_OUTPUT to be defined")
endif ()
if (NOT TEST_CLASSPATH)
  message (STATUS "Require TEST_CLASSPATH to be defined")
endif ()
if (NOT TEST_REFERENCE)
  message (STATUS "Require TEST_REFERENCE to be defined")
endif ()

if (EXISTS ${TEST_FOLDER}/${TEST_OUTPUT})
  file (REMOVE ${TEST_FOLDER}/${TEST_OUTPUT})
endif ()

if (EXISTS ${TEST_FOLDER}/${TEST_OUTPUT}.err)
  file (REMOVE ${TEST_FOLDER}/${TEST_OUTPUT}.err)
endif ()

# if there is not an error reference file add the error output to the stdout file
if (NOT TEST_ERRREF)
  if (NOT SKIP_APPEND)
    # append error file since skip was not defined
    set (ERROR_APPEND 1)
  endif ()
endif ()

if (NOT TEST_LOG_LEVEL)
  set (LOG_LEVEL "info")
else ()
  set (LOG_LEVEL "${TEST_LOG_LEVEL}")
endif ()

message (STATUS "COMMAND: ${TEST_TESTER} -Xmx1024M -Dorg.slf4j.simpleLogger.defaultLog=${LOG_LEVEL} -Djava.library.path=\"${TEST_LIBRARY_DIRECTORY}\" -cp \"${TEST_CLASSPATH}\" ${TEST_ARGS} ${TEST_PROGRAM} ${ARGN}")

if (WIN32 AND NOT MINGW)
  set (ENV{PATH} "$ENV{PATH}\\;${TEST_LIBRARY_DIRECTORY}")
endif ()

# run the test program, capture the stdout/stderr and the result var
execute_process (
    COMMAND ${TEST_TESTER} -Xmx1024M
    -Dorg.slf4j.simpleLogger.defaultLogLevel=${LOG_LEVEL}
    -Djava.library.path=${TEST_LIBRARY_DIRECTORY}
    -cp "${TEST_CLASSPATH}" ${TEST_ARGS} ${TEST_PROGRAM}
    ${ARGN}
    WORKING_DIRECTORY ${TEST_FOLDER}
    RESULT_VARIABLE TEST_RESULT
    OUTPUT_FILE ${TEST_OUTPUT}
    ERROR_FILE ${TEST_OUTPUT}.err
    ERROR_VARIABLE TEST_ERROR
)

message (STATUS "COMMAND Result: ${TEST_RESULT}")

# if the .err file exists and ERRROR_APPEND is enabled
if (EXISTS ${TEST_FOLDER}/${TEST_OUTPUT}.err)
  file (READ ${TEST_FOLDER}/${TEST_OUTPUT}.err TEST_STREAM)
  if (TEST_MASK_FILE)
    STRING(REGEX REPLACE "CurrentDir is [^\n]+\n" "CurrentDir is (dir name)\n" TEST_STREAM "${TEST_STREAM}")
  endif ()

  if (NOT ERROR_APPEND)
    # append error output to the stdout output file
    file (WRITE ${TEST_FOLDER}/${TEST_OUTPUT}.err "${TEST_STREAM}")
  else ()
    # write back to original .err file
    file (APPEND ${TEST_FOLDER}/${TEST_OUTPUT} "${TEST_STREAM}")
  endif ()
endif ()

# if the output file or the .err file needs to mask out error stack info
if (TEST_MASK_ERROR)
  if (NOT TEST_ERRREF)
    # the error stack has been appended to the output file
    file (READ ${TEST_FOLDER}/${TEST_OUTPUT} TEST_STREAM)
  else ()
    # the error stack remains in the .err file
    file (READ ${TEST_FOLDER}/${TEST_OUTPUT}.err TEST_STREAM)
  endif ()
  string (REGEX REPLACE "Time:[^\n]+\n" "Time:  XXXX\n" TEST_STREAM "${TEST_STREAM}")
  string (REGEX REPLACE "thread [0-9]*:" "thread (IDs):" TEST_STREAM "${TEST_STREAM}")
  string (REGEX REPLACE ": ([^\n]*)[.]c " ": (file name) " TEST_STREAM "${TEST_STREAM}")
  string (REGEX REPLACE " line [0-9]*" " line (number)" TEST_STREAM "${TEST_STREAM}")
  #string (REGEX REPLACE "v[1-9]*[.][0-9]*[.]" "version (number)." TEST_STREAM "${TEST_STREAM}")
  string (REGEX REPLACE "HDF4 .[1-9]*[.][0-9]*[.][0-9]*[^)]*" "HDF4 (version (number)" TEST_STREAM "${TEST_STREAM}")
  # write back the changes to the original files
  if (NOT TEST_ERRREF)
    file (WRITE ${TEST_FOLDER}/${TEST_OUTPUT} "${TEST_STREAM}")
  else ()
    file (WRITE ${TEST_FOLDER}/${TEST_OUTPUT}.err "${TEST_STREAM}")
  endif ()
endif ()

# if the return value is !=0 bail out
if (NOT "${TEST_RESULT}" STREQUAL "${TEST_EXPECT}")
  message (STATUS "ERROR OUTPUT: ${TEST_STREAM}")
  message (FATAL_ERROR "Failed: Test program ${TEST_PROGRAM} exited != 0.\n${TEST_ERROR}")
endif ()

message (STATUS "COMMAND Error: ${TEST_ERROR}")

# compare output files to references unless this must be skipped
if (NOT TEST_SKIP_COMPARE)
  if (WIN32 AND NOT MINGW)
    file (READ ${TEST_FOLDER}/${TEST_REFERENCE} TEST_STREAM)
    file (WRITE ${TEST_FOLDER}/${TEST_REFERENCE} "${TEST_STREAM}")
  endif ()

  # now compare the output with the reference
  execute_process (
      COMMAND ${CMAKE_COMMAND} -E compare_files ${TEST_FOLDER}/${TEST_OUTPUT} ${TEST_FOLDER}/${TEST_REFERENCE}
      RESULT_VARIABLE TEST_RESULT
  )
  if (NOT "${TEST_RESULT}" STREQUAL "0")
    set (TEST_RESULT 0)
    file (STRINGS ${TEST_FOLDER}/${TEST_OUTPUT} test_act)
    list (LENGTH test_act len_act)
    file (STRINGS ${TEST_FOLDER}/${TEST_REFERENCE} test_ref)
    list (LENGTH test_ref len_ref)
    if (NOT "${len_act}" STREQUAL "0" AND NOT "${len_ref}" STREQUAL "0")
      math (EXPR _FP_LEN "${len_ref} - 1")
      foreach (line RANGE 0 ${_FP_LEN})
        list (GET test_act ${line} str_act)
        list (GET test_ref ${line} str_ref)
        if (NOT "${str_act}" STREQUAL "${str_ref}")
          if (NOT "${str_act}" STREQUAL "")
            set (TEST_RESULT 1)
            message ("line = ${line}\n***ACTUAL: ${str_act}\n****REFER: ${str_ref}\n")
          endif ()
        endif ()
      endforeach ()
    else ()
      if ("${len_act}" STREQUAL "0")
        message (STATUS "COMPARE Failed: ${TEST_FOLDER}/${TEST_OUTPUT} is empty")
      endif ()
      if ("${len_ref}" STREQUAL "0")
        message (STATUS "COMPARE Failed: ${TEST_FOLDER}/${TEST_REFERENCE} is empty")
      endif ()
    endif ()
    if (NOT "${len_act}" STREQUAL "${len_ref}")
      set (TEST_RESULT 1)
    endif ()
  endif ()

  message (STATUS "COMPARE Result: ${TEST_RESULT}")

  # again, if return value is !=0 scream and shout
  if (NOT "${TEST_RESULT}" STREQUAL "0")
    message (FATAL_ERROR "Failed: The output of ${TEST_OUTPUT} did not match ${TEST_REFERENCE}")
  endif ()

  # now compare the .err file with the error reference, if supplied
  if (TEST_ERRREF)
    if (WIN32 AND NOT MINGW)
      file (READ ${TEST_FOLDER}/${TEST_ERRREF} TEST_STREAM)
      file (WRITE ${TEST_FOLDER}/${TEST_ERRREF} "${TEST_STREAM}")
    endif ()

    # now compare the error output with the error reference
    execute_process (
        COMMAND ${CMAKE_COMMAND} -E compare_files ${TEST_FOLDER}/${TEST_OUTPUT}.err ${TEST_FOLDER}/${TEST_ERRREF}
        RESULT_VARIABLE TEST_RESULT
    )
    if (NOT "${TEST_RESULT}" STREQUAL "0")
      set (TEST_RESULT 0)
      file (STRINGS ${TEST_FOLDER}/${TEST_OUTPUT}.err test_act)
      list (LENGTH test_act len_act)
      file (STRINGS ${TEST_FOLDER}/${TEST_ERRREF} test_ref)
      list (LENGTH test_ref len_ref)
      math (EXPR _FP_LEN "${len_ref} - 1")
      if (NOT "${len_act}" STREQUAL "0" AND NOT "${len_ref}" STREQUAL "0")
        math (EXPR _FP_LEN "${len_ref} - 1")
        foreach (line RANGE 0 ${_FP_LEN})
          list (GET test_act ${line} str_act)
          list (GET test_ref ${line} str_ref)
          if (NOT "${str_act}" STREQUAL "${str_ref}")
            if (NOT "${str_act}" STREQUAL "")
              set (TEST_RESULT 1)
              message ("line = ${line}\n***ACTUAL: ${str_act}\n****REFER: ${str_ref}\n")
            endif ()
          endif ()
        endforeach ()
      else ()
        if ("${len_act}" STREQUAL "0")
          message (STATUS "COMPARE Failed: ${TEST_FOLDER}/${TEST_OUTPUT}.err is empty")
        endif ()
        if ("${len_ref}" STREQUAL "0")
          message (STATUS "COMPARE Failed: ${TEST_FOLDER}/${TEST_ERRREF} is empty")
        endif ()
      endif()
      if (NOT "${len_act}" STREQUAL "${len_ref}")
        set (TEST_RESULT 1)
      endif ()
    endif ()

    message (STATUS "COMPARE Result: ${TEST_RESULT}")

    # again, if return value is !=0 scream and shout
    if (NOT ${TEST_RESULT} STREQUAL 0)
      message (FATAL_ERROR "Failed: The error output of ${TEST_OUTPUT}.err did not match ${TEST_ERRREF}")
    endif ()
  endif ()
endif ()

if (TEST_GREP_COMPARE)
  # now grep the output with the reference
  file (READ ${TEST_FOLDER}/${TEST_OUTPUT} TEST_STREAM)

  # TEST_REFERENCE should always be matched
  string (REGEX MATCH "${TEST_REFERENCE}" TEST_MATCH ${TEST_STREAM})
  string (COMPARE EQUAL "${TEST_REFERENCE}" "${TEST_MATCH}" TEST_RESULT)
  if ("${TEST_RESULT}" STREQUAL "0")
    message (FATAL_ERROR "Failed: The output of ${TEST_PROGRAM} did not contain ${TEST_REFERENCE}")
  endif ()

  string (REGEX MATCH "${TEST_FILTER}" TEST_MATCH ${TEST_STREAM})
  if ("${TEST_EXPECT}" STREQUAL "1")
    # TEST_EXPECT (1) interperts TEST_FILTER as NOT to match
    string (LENGTH "${TEST_MATCH}" TEST_RESULT)
    if (NOT "${TEST_RESULT}" STREQUAL "0")
      message (FATAL_ERROR "Failed: The output of ${TEST_PROGRAM} did contain ${TEST_FILTER}")
    endif ()
  endif ()
endif ()

# everything went fine...
message ("${TEST_PROGRAM} Passed")

