Add request domain tests and factories

tests/conftest.py

@@ -1,18 +1,21 @@
 import pytest
+from sqlalchemy.orm import sessionmaker, scoped_session
 
 from atst.app import make_app, make_deps, make_config
+from atst.database import make_db
 from tests.mocks import MockApiClient, MockFundzClient, MockRequestsClient, MockAuthzClient
 from atst.sessions import DictSessions
 
 
 @pytest.fixture
-def app():
+def app(db):
     TEST_DEPS = {
         "authz_client": MockAuthzClient("authz"),
         "requests_client": MockRequestsClient("requests"),
         "authnid_client": MockApiClient("authnid"),
         "fundz_client": MockFundzClient("fundz"),
         "sessions": DictSessions(),
+        "db_session": db
     }
 
     config = make_config()
@@ -21,6 +24,26 @@ def app():
 
     return make_app(config, deps)
 
+
+@pytest.fixture(scope='function')
+def db():
+
+    # Override db with a new SQLAlchemy session so that we can rollback
+    # each test's transaction.
+    # Inspiration: https://docs.sqlalchemy.org/en/latest/orm/session_transaction.html#session-external-transaction
+    config = make_config()
+    database = make_db(config)
+    connection = database.get_bind().connect()
+    transaction = connection.begin()
+    db = scoped_session(sessionmaker(bind=connection))
+
+    yield db
+
+    db.close()
+    transaction.rollback()
+    connection.close()
+
+
 class DummyForm(dict):
     pass