Chore: warn users about removal of postgres v13 support (#9980)

src/paperless/tests/test_checks.py

@@ -9,6 +9,7 @@ from documents.tests.utils import DirectoriesMixin
 from documents.tests.utils import FileSystemAssertsMixin
 from paperless.checks import audit_log_check
 from paperless.checks import binaries_check
+from paperless.checks import check_postgres_version
 from paperless.checks import debug_mode_check
 from paperless.checks import paths_check
 from paperless.checks import settings_values_check
@@ -262,3 +263,39 @@ class TestAuditLogChecks(TestCase):
                     ("auditlog table was found but audit log is disabled."),
                     msg.msg,
                 )
+
+
+class TestPostgresVersionCheck(TestCase):
+    @mock.patch("paperless.checks.connections")
+    def test_postgres_13_warns(self, mock_connections):
+        mock_connection = mock.MagicMock()
+        mock_connection.vendor = "postgresql"
+        mock_cursor = mock.MagicMock()
+        mock_cursor.__enter__.return_value.fetchone.return_value = ["13.11"]
+        mock_connection.cursor.return_value = mock_cursor
+        mock_connections.__getitem__.return_value = mock_connection
+
+        warnings = check_postgres_version(None)
+        self.assertEqual(len(warnings), 1)
+        self.assertIn("PostgreSQL 13 is deprecated", warnings[0].msg)
+
+    @mock.patch("paperless.checks.connections")
+    def test_postgres_14_passes(self, mock_connections):
+        mock_connection = mock.MagicMock()
+        mock_connection.vendor = "postgresql"
+        mock_cursor = mock.MagicMock()
+        mock_cursor.__enter__.return_value.fetchone.return_value = ["14.10"]
+        mock_connection.cursor.return_value = mock_cursor
+        mock_connections.__getitem__.return_value = mock_connection
+
+        warnings = check_postgres_version(None)
+        self.assertEqual(warnings, [])
+
+    @mock.patch("paperless.checks.connections")
+    def test_non_postgres_skipped(self, mock_connections):
+        mock_connection = mock.MagicMock()
+        mock_connection.vendor = "sqlite"
+        mock_connections.__getitem__.return_value = mock_connection
+
+        warnings = check_postgres_version(None)
+        self.assertEqual(warnings, [])