Change postgis image in test_and_publish.yml to postgis/postgis:16-3.4

Add some formatting for postgresql dialect, MULTIPOINT geom_type.

.github/workflows/test_and_publish.yml

@@ -41,7 +41,7 @@ jobs:
 
     services:
       postgres:
-        image: mdillon/postgis:11
+        image: postgis/postgis:16-3.4
         env:
           POSTGRES_DB: gis
           POSTGRES_PASSWORD: gis

tests/test_functional.py

@@ -358,6 +358,13 @@ class GeomTypeTable(base):
         metadata.drop_all(bind=conn, checkfirst=True)
         metadata.create_all(bind=conn)
 
+        if dialect_name == 'postgresql' and 'MULTIPOINT' in geom_type:
+            # formats wkt to wrap tuple elements in brackets,
+            # for example '(1 2, 3 4)' to '((1 2), (3 4))'.
+            wkt = "({})".format(
+                ", ".join(map(lambda x: '({})'.format(x.strip()), wkt[1:-1].split(',')))
+            )
+
         inserted_wkt = f"{geom_type}{wkt}"
 
         # Use the DB to generate the corresponding raw WKB