Additional test coverage and fix psycopg3 failure.

.github/workflows/tests.yaml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.7, 3.9, "3.10"]
+        python-version: [3.7, 3.9, "3.11"]
         peewee-backend:
           - "sqlite"
           - "postgresql"
@@ -35,8 +35,10 @@ jobs:
         include:
           - python-version: 3.7
             peewee-backend: cockroachdb
-          - python-version: "3.10"
+          - python-version: "3.11"
             peewee-backend: cockroachdb
+          - python-version: "3.11"
+            peewee-backend: psycopg3
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2

tests/base.py

@@ -61,6 +61,7 @@ def get_in_memory_db(**params):
 IS_MYSQL = BACKEND.startswith(('mysql', 'maria'))
 IS_POSTGRESQL = BACKEND.startswith(('postgres', 'psycopg'))
 IS_CRDB = BACKEND in ('cockroach', 'cockroachdb', 'crdb')
+IS_PSYCOPG3 = BACKEND == 'psycopg3'
 
 
 def make_db_params(key):

tests/migrations.py

@@ -8,6 +8,7 @@
 from .base import IS_CRDB
 from .base import IS_MYSQL
 from .base import IS_POSTGRESQL
+from .base import IS_PSYCOPG3
 from .base import IS_SQLITE
 from .base import IS_SQLITE_25
 from .base import IS_SQLITE_35
@@ -331,6 +332,7 @@ class Meta:
     def test_rename_gh380_sqlite_legacy(self):
         self.test_rename_gh380(legacy=True)
 
+    @skip_if(IS_PSYCOPG3, 'Psycopg3 chokes on the default value.')
     def test_add_default_drop_default(self):
         with self.database.transaction():
             migrate(self.migrator.add_column_default('person', 'first_name',