From c8dad116266ce555e788b454527f7e163929fa44 Mon Sep 17 00:00:00 2001
From: George Gayno <ggayno@hercules-login-3.hpc.msstate.edu>
Date: Thu, 5 Dec 2024 08:23:28 -0600
Subject: [PATCH] Complete unit test for "file_nearest_pole_points".

Fixes #1000.
---
 tests/orog/ftst_find_nearest_pole_pts.F90 | 58 +++++++++++++++++++++--
 1 file changed, 53 insertions(+), 5 deletions(-)

diff --git a/tests/orog/ftst_find_nearest_pole_pts.F90 b/tests/orog/ftst_find_nearest_pole_pts.F90
index b0da658da..4c6844790 100644
--- a/tests/orog/ftst_find_nearest_pole_pts.F90
+++ b/tests/orog/ftst_find_nearest_pole_pts.F90
@@ -1,5 +1,14 @@
  program find_nearest_pole_pts
 
+! Unit test for routine find_nearest_pole_points.
+!
+! The routine is passed the supergrid indices of
+! the pole (from the 'grid' files) and returns the 
+! nearest pole points (using a logical array) on 
+! the model tile.
+!
+! Author George Gayno NCEP/EMC
+
  use orog_utils, only     : find_nearest_pole_points
 
  implicit none
@@ -14,10 +23,14 @@ program find_nearest_pole_pts
  logical                 :: is_north_pole(im,jm)
  logical                 :: is_south_pole(im,jm)
 
+ print*,"Starting test of find_nearest_pole_points routine."
+
 ! Test 1 - C48 uniform tile containing north pole.
 
- i_north_pole = 49 ! supergrid index
- j_north_pole = 49 ! uniform grid
+ print*,"Test number 1."
+
+ i_north_pole = 49 ! Supergrid index
+ j_north_pole = 49
  i_south_pole = 0
  j_south_pole = 0
 
@@ -41,9 +54,11 @@ program find_nearest_pole_pts
 
 ! Test 2 - C48 uniform tile containing south pole.
 
+ print*,"Test number 2."
+
  i_north_pole = 0
  j_north_pole = 0
- i_south_pole = 49
+ i_south_pole = 49 ! Supergrid index.
  j_south_pole = 49
 
  call find_nearest_pole_points(i_north_pole, j_north_pole, &
@@ -66,7 +81,9 @@ program find_nearest_pole_pts
 
 ! Test 3 - C48 uniform tile containing no pole.
 
- i_north_pole = 0
+ print*,"Test number 3."
+
+ i_north_pole = 0  ! Zero indicates no pole.
  j_north_pole = 0
  i_south_pole = 0
  j_south_pole = 0
@@ -84,9 +101,11 @@ program find_nearest_pole_pts
 
 ! Test 4 - C48 stretched grid tile containing south pole.
 
+ print*,"Test number 4."
+
  i_north_pole = 0
  j_north_pole = 0
- i_south_pole = 10
+ i_south_pole = 10 ! Supergrid index.
  j_south_pole = 49
 
  call find_nearest_pole_points(i_north_pole, j_north_pole, &
@@ -105,4 +124,33 @@ program find_nearest_pole_pts
  enddo
  enddo
 
+! Test 5 - C48 stretched grid tile containing north pole.
+
+ print*,"Test number 5."
+
+ i_north_pole = 62  ! Supergrid index.
+ j_north_pole = 49
+ i_south_pole = 0
+ j_south_pole = 0
+
+ call find_nearest_pole_points(i_north_pole, j_north_pole, &
+      i_south_pole, j_south_pole, im, jm, is_north_pole, &
+      is_south_pole)
+
+ do j = 1, im
+ do i = 1, jm
+   if((i == 31 .and. j == 24) .or. &
+      (i == 31 .and. j == 25)) then
+     if (.not.is_north_pole(i,j)) stop 32
+   else
+     if (is_north_pole(i,j)) stop 34
+   endif
+   if (is_south_pole(i,j)) stop 38
+ enddo
+ enddo
+
+ print*,"OK"
+
+ print*,"SUCCESS"
+
  end program find_nearest_pole_pts