feat(backend): added auth, reviews, users modules

also provided tests

src/backend/apps/users/tests/test_models.py

@@ -0,0 +1,56 @@
+import uuid
+
+from django.test import TestCase
+
+from apps.users.models import User, UserRole
+
+from ._helpers import _make_user
+
+
+class UserRoleChoicesTest(TestCase):
+    def test_choices_count(self) -> None:
+        self.assertEqual(len(UserRole.choices), 4)
+
+    def test_choice_values(self) -> None:
+        values = {c[0] for c in UserRole.choices}
+        self.assertEqual(
+            values, {"admin", "experimenter", "approver", "viewer"}
+        )
+
+
+class UserModelTest(TestCase):
+    def test_default_role_is_viewer(self) -> None:
+        user: User = _make_user()
+        self.assertEqual(user.role, UserRole.VIEWER)
+
+    def test_role_properties(self) -> None:
+        admin: User = _make_user(
+            username="a", email="a@x.com", role=UserRole.ADMIN
+        )
+        self.assertTrue(admin.is_admin_role)
+        self.assertFalse(admin.is_experimenter)
+        self.assertFalse(admin.is_approver)
+        self.assertFalse(admin.is_viewer)
+
+        exp: User = _make_user(
+            username="e", email="e@x.com", role=UserRole.EXPERIMENTER
+        )
+        self.assertTrue(exp.is_experimenter)
+
+        appr: User = _make_user(
+            username="ap", email="ap@x.com", role=UserRole.APPROVER
+        )
+        self.assertTrue(appr.is_approver)
+
+        viewer: User = _make_user(
+            username="v", email="v@x.com", role=UserRole.VIEWER
+        )
+        self.assertTrue(viewer.is_viewer)
+
+    def test_uuid_primary_key(self) -> None:
+        user: User = _make_user()
+        self.assertIsInstance(user.pk, uuid.UUID)
+
+    def test_str_representation(self) -> None:
+        user: User = _make_user(username="hello")
+        self.assertEqual(str(user), "hello")