feat(content): function signatures + test cases

backend/data/questions/alphabet-board-path.yaml

@@ -9,6 +9,26 @@ categories:
 patterns:
   - matrix-traversal
 
+function_signature: "def alphabet_board_path(target: str) -> str:"
+
+test_cases:
+  visible:
+    - input: { target: "leet" }
+      expected: "DDR!UURRR!!DDD!"
+    - input: { target: "code" }
+      expected: "RR!DDRR!UUL!R!"
+  hidden:
+    - input: { target: "a" }
+      expected: "!"
+    - input: { target: "z" }
+      expected: "DDDDD!"
+    - input: { target: "zdz" }
+      expected: "DDDDD!UUUUURRR!LLLDDDDD!"
+    - input: { target: "aa" }
+      expected: "!!"
+    - input: { target: "abc" }
+      expected: "!R!R!"
+
 description: |
   On an alphabet board, we start at position `(0, 0)`, corresponding to character `board[0][0]`.