added test file

CMakeLists.txt

@@ -15,7 +15,7 @@ option(USE_NETCDF "Use NetCDF" on)
 option(USE_REGEX "Use Regex?" on)
 option(USE_TIGGE "Use tigge?" on)
 option(USE_MYSQL "Use MySQL?" off)
-option(USE_IPOLATES "Use Ipolates" on)
+option(USE_IPOLATES "Use Ipolates" off)
 option(USE_UDF "Use UDF?" off)
 option(USE_OPENMP "Use OpenMP?" on)
 option(USE_PROJ4 "Use Proj4?" off)

tests/run_wgrib2_png_tests.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+# This script runs a series of tests using the RPN calculator
+#
+# Alyson Stahl 5/7/2024
+
+set -e
+echo ""
+echo "*** Running wgrib2 png tests"
+
+
+
+r1="1:0:(2000,1000),lon=304.937500,lat=-27.584172,val=1"
+r2=`../wgrib2/wgrib2 data/png_4bits.png -ijlat 2000 1000`
+if [ "$r1" != "$r2" ] ; then
+  echo "failed png test1 $r2"
+  echo "expected         $r1"
+  exit 1
+fi
+
+r1="1:0:(2000,2000),lon=249.995002,lat=39.995000,val=0"
+r2=`../wgrib2/wgrib2 data/large_png.grb2 -ijlat 2000 2000`
+if [ "$r1" != "$r2" ] ; then
+  echo "failed png test2 $r2"
+  echo "expected         $r1"
+  exit 1
+fi
+
+echo "*** SUCCESS!"
+exit 0