feat(content): hidden test cases

backend/data/questions/word-search-ii.yaml

@@ -12,6 +12,32 @@ patterns:
   - backtracking
   - matrix-traversal
 
+function_signature: "def find_words(board: list[list[str]], words: list[str]) -> list[str]:"
+
+test_cases:
+  visible:
+    - input:
+        board: [["o", "a", "a", "n"], ["e", "t", "a", "e"], ["i", "h", "k", "r"], ["i", "f", "l", "v"]]
+        words: ["oath", "pea", "eat", "rain"]
+      expected: ["eat", "oath"]
+    - input:
+        board: [["a", "b"], ["c", "d"]]
+        words: ["abcb"]
+      expected: []
+  hidden:
+    - input:
+        board: [["a"]]
+        words: ["a"]
+      expected: ["a"]
+    - input:
+        board: [["a", "b"], ["c", "d"]]
+        words: ["ab", "cb", "ad", "bd", "ac", "ca", "da", "bc", "db", "adcb", "dabc", "abb", "acb"]
+      expected: ["ab", "ac", "bd", "ca", "db"]
+    - input:
+        board: [["o", "a", "b", "n"], ["o", "t", "a", "e"], ["a", "h", "k", "r"], ["a", "f", "l", "v"]]
+        words: ["oa", "oaa"]
+      expected: ["oa", "oaa"]
+
 description: |
   Given an `m x n` `board` of characters and a list of strings `words`, return *all words on the board*.