!----------------------------------------------------------------------
!     Copyright (c) 2009 Shin-ichi Takehiro. All rights reserved.
!----------------------------------------------------------------------
!
!表題  ee_module_fftj テストプログラム (正逆変換)
!
!履歴  2009/09/09  竹広真一  ee_test_transform.f90 より ee_module_fftj 用に改造
!
program ee_module_fftj_base_test1

  use dc_message, only : MessageNotify
  use dc_test, only : AssertEqual
  use ee_module_fftj
  implicit none

 !---- 空間解像度設定 ----
  integer, parameter :: im=32, jm=32            ! 格子点の設定(X,Y)
  integer, parameter :: km=10, lm=10              ! 切断波数の設定(X,Y)

 !---- 変数 ----
  real(8)            :: yx_Data(0:jm-1,0:im-1)    ! 格子データ
  real(8)            :: ee_Data(-lm:lm,-km:km)    ! スペクトルデータ

  integer            :: k=2,l=5

 !---- 座標変数など ----
  real(8), parameter :: xmin = 0.0d0, xmax=2.0d0
  real(8), parameter :: ymin = 0.0d0, ymax=2.0d0

  real(8), parameter :: pi=3.1415926535897932385D0

  ! 判定誤差設定
  integer, parameter :: check_digits = 11
  integer, parameter :: ignore = -12

  call MessageNotify('M','ee_module_fftj_base_test1', &
       'ee_module_fftj basic transform function tests')

 !---------------- 座標値の設定 ---------------------
  call ee_initial(im,jm,km,lm,xmin,xmax,ymin,ymax)    ! スペクトル初期化

 !------------------- 関数チェック ----------------------
  yx_Data = sin(k*pi*yx_X) * sin(l*pi*yx_Y)
  ee_Data = 0.0 ; ee_Data(-l,k) = 0.25  ; ee_Data(l,k) = -0.25  

  call AssertEqual(&
    message='ee_yx with sin(k*pi*X)*sin(l*pi*Y)',                 &
    answer = ee_Data,                                             &
    check = ee_yx(yx_Data),                                       &
    significant_digits = check_digits, ignore_digits = ignore     &
    )
  call AssertEqual(&
    message='yx_ee with sin(k*pi*X)*sin(l*pi*Y)',                 &
    answer = yx_Data,                                             &
    check = yx_ee(ee_yx(yx_Data)),                                &
    significant_digits = check_digits, ignore_digits = ignore     &
    )

  yx_Data = cos(k*pi*yx_X) * cos(l*pi*yx_Y)
  ee_Data = 0.0 ; ee_Data(l,k) = 0.25  ; ee_Data(-l,k) = 0.25  

  call AssertEqual(&
    message='ee_yx with cos(k*pi*X)*cos(l*pi*Y)',                 &
    answer = ee_Data,                                             &
    check = ee_yx(yx_Data),                                       &
    significant_digits = check_digits, ignore_digits = ignore     &
    )
  call AssertEqual(&
    message='yx_ee with cos(k*pi*X)*cos(l*pi*Y)',                 &
    answer = yx_Data,                                             &
    check = yx_ee(ee_yx(yx_Data)),                                &
    significant_digits = check_digits, ignore_digits = ignore     &
    )

  yx_Data = sin(k*pi*yx_X) * cos(l*pi*yx_Y)
  ee_Data = 0.0 ; ee_Data(-l,-k) = -0.25  ; ee_Data(l,-k) = - 0.25  

  call AssertEqual(&
    message='ee_yx with sin(k*pi*X)*cos(l*pi*Y)',                 &
    answer = ee_Data,                                             &
    check = ee_yx(yx_Data),                                       &
    significant_digits = check_digits, ignore_digits = ignore     &
    )
  call AssertEqual(&
    message='yx_ee with sin(k*pi*X)*cos(l*pi*Y)',                 &
    answer = yx_Data,                                             &
    check = yx_ee(ee_yx(yx_Data)),                                &
    significant_digits = check_digits, ignore_digits = ignore     &
    )

  yx_Data = cos(k*pi*yx_X) * sin(l*pi*yx_Y)
  ee_Data = 0.0 ; ee_Data(-l,-k) = -0.25  ; ee_Data(l,-k) = 0.25  

  call AssertEqual(&
    message='ee_yx with cos(k*pi*X)*sin(l*pi*Y)',                 &
    answer = ee_Data,                                             &
    check = ee_yx(yx_Data),                                       &
    significant_digits = check_digits, ignore_digits = ignore     &
    )
  call AssertEqual(&
    message='yx_ee with cos(k*pi*X)*sin(l*pi*Y)',                 &
    answer = yx_Data,                                             &
    check = yx_ee(ee_yx(yx_Data)),                                &
    significant_digits = check_digits, ignore_digits = ignore     &
    )

  call MessageNotify('M','ee_module_fftj_base_test1', &
       'ee_module_fftj basic transform functions tests succeeded!')

end program ee_module_fftj_base_test1