Testing: Function to check grib_set and grib_filter

tests/utils.sh

@@ -49,3 +49,36 @@ grib_check_key_is_scalar()
    result=$(echo "print '|[$a_key]|';" | ${tools_dir}/grib_filter - $a_file)
     [ "$result" = "|$a_val|" ]
 }
+
+# This ensures setting the keys via grib_filter (similar to the API, one key at a time)
+# works the same way as grib_set. The resultant GRIB outputs are compared
+# E.g.,
+#    grib_encode_via_set_and_filter $label key1=val1,key2=val2,key3=val3 $ECCODES_SAMPLES_PATH/GRIB2.tmpl
+#
+grib_encode_via_set_and_filter()
+{
+  _label=$1 # For generating temp files
+  _kvals=$2 # key1=val1,key2=val2
+  _input=$3 # Must be a GRIB file
+
+  temp_encode_filt=temp.encode.$_label.filt
+  temp_encode_gribA=temp.encode.$_label.A.grib
+  temp_encode_gribB=temp.encode.$_label.B.grib
+
+  for kv in $(echo $_kvals | tr ',' ' '); do
+    k=$(echo $kv | awk -F= '{print $1}')
+    v=$(echo $kv | awk -F= '{print $2}')
+    if [[ "$v" =~ ^[A-z] ]]; then
+      echo "set $k = \"$v\" ;" >> $temp_encode_filt
+    else
+      echo "set $k = $v ;" >> $temp_encode_filt
+    fi
+  done
+  echo "write;" >> $temp_encode_filt
+  # cat $temp_encode_filt
+  ${tools_dir}/grib_filter -o $temp_encode_gribA $temp_encode_filt $_input
+  ${tools_dir}/grib_set -s $_kvals $_input $temp_encode_gribB
+  ${tools_dir}/grib_compare  $temp_encode_gribA $temp_encode_gribB
+
+  rm -f $temp_encode_filt $temp_encode_gribB $temp_encode_gribA
+}