feat: add postgres-18:rc1 as database and default postgres version

Author: Kumzy

docs/supported-databases/postgres.rst

@@ -8,7 +8,7 @@ Installation
 
 .. code-block:: bash
 
-   pip install pytest-databases[postgres]
+    pip install pytest-databases[postgres]
 
 Usage Example
 -------------
@@ -54,6 +54,7 @@ The following version-specific fixtures are also available:
 * ``postgres_15_image``, ``postgres_15_service``, ``postgres_15_connection``: PostgreSQL 15.x
 * ``postgres_16_image``, ``postgres_16_service``, ``postgres_16_connection``: PostgreSQL 16.x
 * ``postgres_17_image``, ``postgres_17_service``, ``postgres_17_connection``: PostgreSQL 17.x
+* ``postgres_18_image``, ``postgres_18_service``, ``postgres_18_connection``: PostgreSQL 18.x
 * ``pgvector_image``, ``pgvector_service``. ``pgvector_connection``: Latest Available pgvector Docker image.
 
 Configuration
@@ -67,13 +68,13 @@ Example usage with custom host:
 
 .. code-block:: bash
 
-   export POSTGRES_HOST="192.168.1.100"
-   pytest
+    export POSTGRES_HOST="192.168.1.100"
+    pytest
 
 Service API
 -----------
 
 .. automodule:: pytest_databases.docker.postgres
-   :members:
-   :undoc-members:
-   :show-inheritance:
+    :members:
+    :undoc-members:
+    :show-inheritance:

src/pytest_databases/_service.py

@@ -10,10 +10,10 @@
 
 import filelock
 import pytest
+from docker import DockerClient
 from docker.errors import APIError, ImageNotFound
 from typing_extensions import Self
 
-from docker import DockerClient
 from pytest_databases.helpers import get_xdist_worker_id
 from pytest_databases.types import ServiceContainer
 

src/pytest_databases/docker/postgres.py

@@ -244,6 +244,26 @@ def postgres_17_service(
         yield service
 
 
+@pytest.fixture(autouse=False, scope="session")
+def postgres_18_service(
+    docker_service: DockerService,
+    xdist_postgres_isolation_level: XdistIsolationLevel,
+    postgres_host: str,
+    postgres_user: str,
+    postgres_password: str,
+) -> Generator[PostgresService, None, None]:
+    with _provide_postgres_service(
+        docker_service,
+        image="postgres:18-rc1",
+        name="postgres-18",
+        xdist_postgres_isolate=xdist_postgres_isolation_level,
+        host=postgres_host,
+        user=postgres_user,
+        password=postgres_password,
+    ) as service:
+        yield service
+
+
 @pytest.fixture(autouse=False, scope="session")
 def postgres_11_connection(
     postgres_11_service: PostgresService,
@@ -356,9 +376,25 @@ def postgres_17_connection(
         yield conn
 
 
+@pytest.fixture(autouse=False, scope="session")
+def postgres_18_connection(
+    postgres_18_service: PostgresService,
+) -> Generator[psycopg.Connection, None, None]:
+    with psycopg.connect(
+        _make_connection_string(
+            host=postgres_18_service.host,
+            port=postgres_18_service.port,
+            user=postgres_18_service.user,
+            password=postgres_18_service.password,
+            database=postgres_18_service.database,
+        ),
+    ) as conn:
+        yield conn
+
+
 @pytest.fixture(autouse=False, scope="session")
 def postgres_image() -> str:
-    return "postgres:17"
+    return "postgres:18"
 
 
 @pytest.fixture(autouse=False, scope="session")

tests/test_postgres.py

@@ -13,6 +13,7 @@
         "postgres_15_service",
         "postgres_16_service",
         "postgres_17_service",
+        "postgres_18_service",
         "alloydb_omni_service",
         "pgvector_service",
     ],
@@ -57,6 +58,7 @@ def test({service_fixture}) -> None:
         "postgres_15_connection",
         "postgres_16_connection",
         "postgres_17_connection",
+        "postgres_18_connection",
         "alloydb_omni_connection",
         "pgvector_connection",
     ],