Add domain tests for all of authz

tests/domain/test_roles.py

@@ -0,0 +1,23 @@
+import pytest
+from atst.domain.roles import Roles
+from atst.domain.exceptions import NotFoundError
+
+
+@pytest.fixture()
+def roles_repo(db):
+    return Roles(db)
+
+
+def test_get_all_roles(roles_repo):
+    roles = roles_repo.get_all()
+    assert roles
+
+
+def test_get_existing_role(roles_repo):
+    role = roles_repo.get("developer")
+    assert role.name == "developer"
+
+
+def test_get_nonexistent_role(roles_repo):
+    with pytest.raises(NotFoundError):
+        roles_repo.get("nonexistent")