feat: add sum with image reference problem

tests/test_sum_with_image_reference_endpoint.py

@@ -0,0 +1,88 @@
+import unittest
+
+from fastapi.testclient import TestClient
+
+from app.main import create_app
+
+
+class SumWithImageReferenceEndpointTest(unittest.TestCase):
+    def setUp(self) -> None:
+        self.client = TestClient(create_app())
+        self.first_picture = {
+            "id": "red-flower",
+            "name": "Red flower",
+            "image_path": "/images/red-flower.png",
+        }
+        self.second_picture = {
+            "id": "white-flower",
+            "name": "White flower",
+            "image_path": "/images/white-flower.png",
+        }
+
+    def test_creates_problem_with_one_correct_option(self) -> None:
+        response = self.client.post(
+            "/math/grade_1/sum_with_image_reference",
+            json={
+                "first_quantity": 5,
+                "second_quantity": 4,
+                "first_description": "flores rojas",
+                "second_description": "flores blancas",
+                "common_object": "flores",
+                "first_picture": self.first_picture,
+                "second_picture": self.second_picture,
+                "option_count": 3,
+                "seed": 1,
+            },
+        )
+
+        self.assertEqual(response.status_code, 200)
+        problem = response.json()
+        correct_options = [option for option in problem["options"] if option["is_correct"]]
+
+        self.assertEqual(
+            problem["question"],
+            "Hay 5 flores rojas y 4 flores blancas, ¿cuántas flores hay en total?",
+        )
+        self.assertEqual(problem["instructions"], "Escoge la imagen en la próxima página.")
+        self.assertEqual(problem["total"], 9)
+        self.assertEqual(len(problem["options"]), 3)
+        self.assertEqual(len(correct_options), 1)
+        self.assertEqual(correct_options[0]["quantity"], 9)
+        self.assertEqual(correct_options[0]["first_group"]["quantity"], 5)
+        self.assertEqual(correct_options[0]["second_group"]["quantity"], 4)
+
+        for option in problem["options"]:
+            first_group = option["first_group"]
+            second_group = option["second_group"]
+
+            self.assertEqual(option["quantity"], first_group["quantity"] + second_group["quantity"])
+            self.assertEqual(first_group["description"], "flores rojas")
+            self.assertEqual(second_group["description"], "flores blancas")
+            self.assertEqual(first_group["picture"], self.first_picture)
+            self.assertEqual(second_group["picture"], self.second_picture)
+
+    def test_returns_bad_request_when_total_is_outside_option_range(self) -> None:
+        response = self.client.post(
+            "/math/grade_1/sum_with_image_reference",
+            json={
+                "first_quantity": 5,
+                "second_quantity": 4,
+                "first_description": "flores rojas",
+                "second_description": "flores blancas",
+                "common_object": "flores",
+                "first_picture": self.first_picture,
+                "second_picture": self.second_picture,
+                "min_option_quantity": 1,
+                "max_option_quantity": 8,
+            },
+        )
+
+        self.assertEqual(response.status_code, 400)
+        self.assertEqual(
+            response.json(),
+            {"detail": "option quantity range must include the correct total"},
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()