test: add 'nodb' test runner

ensure things work as expected if sqlalchemy is not installed

tests/db/test_conf.py

@@ -5,14 +5,17 @@ import shutil
 import tempfile
 from unittest import TestCase
 
+from wuttjamaican.conf import WuttaConfig
+
+try:
     import sqlalchemy as sa
     from sqlalchemy import orm
     from sqlalchemy.engine import Engine
     from sqlalchemy.pool import NullPool
-
     from wuttjamaican.db import conf
-from wuttjamaican.conf import WuttaConfig
+except ImportError:
-
+    pass
+else:
 
     class TestGetEngines(TestCase):
 

tests/db/test_sess.py

@@ -3,12 +3,15 @@
 from unittest import TestCase
 from unittest.mock import MagicMock
 
-import sqlalchemy as sa
-from sqlalchemy import orm
-
-from wuttjamaican.db import sess
 from wuttjamaican.conf import WuttaConfig
 
+try:
+    import sqlalchemy as sa
+    from sqlalchemy import orm
+    from wuttjamaican.db import sess
+except ImportError:
+    pass
+else:
 
     class TestShortSession(TestCase):
 

tests/test_app.py

@@ -7,10 +7,9 @@ import warnings
 from unittest import TestCase
 from unittest.mock import patch, MagicMock
 
-import sqlalchemy as sa
+import pytest
-from sqlalchemy import orm
 
-from wuttjamaican import app, db
+from wuttjamaican import app
 from wuttjamaican.conf import WuttaConfig
 
 
@@ -46,6 +45,11 @@ class TestAppHandler(TestCase):
         shutil.rmtree(tempdir)
 
     def test_make_session(self):
+        try:
+            from wuttjamaican import db
+        except ImportError:
+            pytest.skip("test is not relevant without sqlalchemy")
+
         session = self.app.make_session()
         self.assertIsInstance(session, db.Session.class_)
 
@@ -60,6 +64,12 @@ class TestAppHandler(TestCase):
                     foo='bar', factory=self.app.make_session)
 
     def test_get_setting(self):
+        try:
+            import sqlalchemy as sa
+            from sqlalchemy import orm
+        except ImportError:
+            pytest.skip("test is not relevant without sqlalchemy")
+
         Session = orm.sessionmaker()
         engine = sa.create_engine('sqlite://')
         session = Session(bind=engine)

tests/test_conf.py

@@ -5,12 +5,10 @@ import os
 from unittest import TestCase
 from unittest.mock import patch, MagicMock
 
-import sqlalchemy as sa
+import pytest
 
 from wuttjamaican import conf
 from wuttjamaican.exc import ConfigurationError
-from wuttjamaican.db import Session
-from wuttjamaican.db.conf import make_engine_from_config
 from wuttjamaican.app import AppHandler
 from wuttjamaican.testing import FileConfigTestCase
 
@@ -133,6 +131,13 @@ require = %(here)s/first.conf
         self.assertEqual(config.get('foo'), 'bar')
 
     def test_constructor_db_flags(self):
+        try:
+            # nb. we don't need this import but the test will not
+            # behave correctly unless the lib is installed
+            import sqlalchemy
+        except ImportError:
+            pytest.skip("test is not relevant without sqlalchemy")
+
         myfile = self.write_file('my.conf', """\
 [wutta.config]
 usedb = true
@@ -155,6 +160,12 @@ preferdb = true
         self.assertTrue(config.preferdb)
 
     def test_constructor_db_not_supported(self):
+        try:
+            # nb. we don't need this import but the test will not
+            # behave correctly unless the lib is installed
+            import sqlalchemy
+        except ImportError:
+            pytest.skip("test is not relevant without sqlalchemy")
 
         # flags are off by default
         config = conf.WuttaConfig()
@@ -269,6 +280,12 @@ configure_logging = true
         self.assertEqual(config.get('foo', default='bar'), 'bar')
 
     def test_get_from_db(self):
+        try:
+            import sqlalchemy as sa
+            from wuttjamaican.db import Session
+        except ImportError:
+            pytest.skip("test is not relevant without sqlalchemy")
+
         # minimal config, but at least it needs db cxn info
         config = conf.WuttaConfig(defaults={'wutta.db.default.url': 'sqlite://'})
 
@@ -317,6 +334,11 @@ configure_logging = true
             self.assertIn("makin stuff up", str(error))
 
     def test_get_preferdb(self):
+        try:
+            import sqlalchemy as sa
+            from wuttjamaican.db import Session
+        except ImportError:
+            pytest.skip("test is not relevant without sqlalchemy")
 
         # start out with a default value
         config = conf.WuttaConfig(defaults={'wutta.db.default.url': 'sqlite://',
@@ -403,6 +425,10 @@ configure_logging = true
         self.assertIsInstance(app, CustomAppHandler)
 
     def test_get_engine_maker(self):
+        try:
+            from wuttjamaican.db.conf import make_engine_from_config
+        except ImportError:
+            pytest.skip("test is not relevant without sqlalchemy")
 
         # default func
         config = conf.WuttaConfig()
@@ -421,7 +447,7 @@ class CustomAppHandler(AppHandler):
     pass
 
 
-def custom_make_engine_from_config(*args, **kwargs):
+def custom_make_engine_from_config():
     pass
 
 

tox.ini

@@ -1,6 +1,6 @@
 
 [tox]
-envlist = py36, py37, py38, py39, py310, py311
+envlist = py36, py37, py38, py39, py310, py311, nodb
 
 # TODO: can remove this when we drop py36 support
 # nb. need this for testing older python versions
@@ -15,6 +15,9 @@ commands = pytest {posargs}
 # nb. newer coverage is causing segfault for this one, so must avoid that
 deps = coverage<6.5
 
+[testenv:nodb]
+extras = tests
+
 [testenv:coverage]
 basepython = python3.11
 extras = db,tests