Add unit test for routine find_poles.

Fixes ufs-community#1000.

tests/orog/CMakeLists.txt

@@ -33,3 +33,7 @@ target_link_libraries(ftst_inside_polygon orog_lib)
 add_executable(ftst_transpose ftst_transpose.F90)
 add_test(NAME orog-ftst_transpose COMMAND ftst_transpose)
 target_link_libraries(ftst_transpose orog_lib)
+
+add_executable(ftst_find_poles ftst_find_poles.F90)
+add_test(NAME orog-ftst_find_poles COMMAND ftst_find_poles)
+target_link_libraries(ftst_find_poles orog_lib)

tests/orog/ftst_find_poles.F90

@@ -0,0 +1,69 @@
+ program ftst_find_poles
+
+! Unit test for routine find_poles.
+!
+! Author George Gayno NCEP/EMC
+
+ use orog_utils, only    : find_poles
+
+ implicit none
+
+ integer, parameter     :: nx=9
+ integer, parameter     :: ny=9
+
+ integer                :: i_north_pole, j_north_pole
+ integer                :: i_south_pole, j_south_pole
+
+ real                   :: geolat(nx+1,ny+1)
+
+ print*,"Starting test of find_poles."
+
+! Point 1 - North Pole at (4,5)
+
+ print*,"North pole test."
+
+ geolat      = 89.0
+ geolat(4,5) = 89.95  ! North pole
+
+ call find_poles(geolat, nx, ny, i_north_pole, j_north_pole, &
+                 i_south_pole, j_south_pole)
+
+ if (i_north_pole /= 4) stop 2
+ if (j_north_pole /= 5) stop 4
+ if (i_south_pole /= 0) stop 6
+ if (j_south_pole /= 0) stop 8
+
+! Point 2 - South Pole at (2,8)
+
+ print*,"South pole test."
+
+ geolat      = -89.0
+ geolat(2,8) = -89.95  ! South pole
+
+ call find_poles(geolat, nx, ny, i_north_pole, j_north_pole, &
+                 i_south_pole, j_south_pole)
+
+ if (i_north_pole /= 0) stop 12
+ if (j_north_pole /= 0) stop 14
+ if (i_south_pole /= 2) stop 16
+ if (j_south_pole /= 8) stop 18
+
+! Point 3 - No pole points.
+
+ print*,"No pole test."
+
+ geolat      = -89.3
+
+ call find_poles(geolat, nx, ny, i_north_pole, j_north_pole, &
+                 i_south_pole, j_south_pole)
+
+ if (i_north_pole /= 0) stop 22
+ if (j_north_pole /= 0) stop 24
+ if (i_south_pole /= 0) stop 26
+ if (j_south_pole /= 0) stop 28
+
+ print*,"OK"
+
+ print*,"SUCCESS"
+
+ end program ftst_find_poles