108536234: created users and roles data and domain model.

You will need to run the /scripts/bootstrap.sh to create the database for test and the app.

tests/conftest.py

@@ -0,0 +1,39 @@
+import pytest
+from sqlalchemy.schema import MetaData, DropConstraint
+
+from app import create_app, db
+from app.models import Roles
+
+
+@pytest.fixture(scope='module')
+def notifications_admin(request):
+    app = create_app('test')
+    ctx = app.app_context()
+    ctx.push()
+
+    def teardown():
+        ctx.pop()
+
+    request.addfinalizer(teardown)
+    return app
+
+
+@pytest.fixture(scope='module')
+def notifications_admin_db(notifications_admin, request):
+    metadata = MetaData(db.engine)
+    metadata.reflect()
+    for table in metadata.tables.values():
+        for fk in table.foreign_keys:
+            db.engine.execute(DropConstraint(fk.constraint))
+    metadata.drop_all()
+
+    # Create the tables based on the current model
+    db.create_all()
+
+    # Add base data here
+    role = Roles(id=1, role='test_role')
+    db.session.add(role)
+    db.session.commit()
+    db.session.flush()
+    db.session.expunge_all()
+    db.session.commit()