Add a GeoJSON assertion to the PostGIS Kuttl test

Issue: [sc-13236]

Author: tjmoore4

testing/kuttl/e2e-other/postgis-cluster/01--psql-connect.yaml

@@ -116,3 +116,17 @@ spec:
  echo "$RESULT"
  exit 1
  fi
+
+ # check GeoJSON function
+ RESULT=$(psql -c "DO \$\$
+ DECLARE
+ result text;
+ BEGIN
+ SELECT ST_AsText(ST_AsGeoJSON('SRID=4326;POINT(-118.4079 33.9434)'::geography)) INTO result;
+ ASSERT result = 'POINT(-118.4079 33.9434)', 'GeoJSON check failed';
+ END \$\$;" 2>&1)
+ 
+ if [[ "$RESULT" == *"ERROR"* ]]; then
+ echo "$RESULT"
+ exit 1
+ fi