feat(content): hidden test cases

backend/data/questions/open-the-lock.yaml

@@ -10,6 +10,28 @@ categories:
 patterns:
   - bfs
 
+function_signature: "def open_lock(deadends: list[str], target: str) -> int:"
+
+test_cases:
+  visible:
+    - input: { deadends: ["0201", "0101", "0102", "1212", "2002"], target: "0202" }
+      expected: 6
+    - input: { deadends: ["8888"], target: "0009" }
+      expected: 1
+    - input: { deadends: ["8887", "8889", "8878", "8898", "8788", "8988", "7888", "9888"], target: "8888" }
+      expected: -1
+  hidden:
+    - input: { deadends: ["0000"], target: "1111" }
+      expected: -1
+    - input: { deadends: [], target: "0000" }
+      expected: 0
+    - input: { deadends: [], target: "1111" }
+      expected: 4
+    - input: { deadends: ["1111"], target: "1112" }
+      expected: 5
+    - input: { deadends: ["0001", "0010", "0100", "1000"], target: "9999" }
+      expected: 4
+
 description: |
   You have a lock in front of you with 4 circular wheels. Each wheel has 10 slots: `'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'`. The wheels can rotate freely and wrap around: for example we can turn `'9'` to be `'0'`, or `'0'` to be `'9'`. Each move consists of turning **one wheel one slot**.