feat(content): more test cases

backend/data/questions/reverse-linked-list.yaml

@@ -9,6 +9,22 @@ categories:
 patterns:
   - linkedlist-reversal
 
+function_signature: "def reverse_list(head: ListNode | None) -> ListNode | None:"
+
+test_cases:
+  visible:
+    - input: { head: [1, 2, 3, 4, 5] }
+      expected: [5, 4, 3, 2, 1]
+    - input: { head: [1, 2] }
+      expected: [2, 1]
+    - input: { head: [] }
+      expected: []
+  hidden:
+    - input: { head: [1] }
+      expected: [1]
+    - input: { head: [1, 2, 3] }
+      expected: [3, 2, 1]
+
 description: |
   Given the `head` of a singly linked list, reverse the list, and return *the reversed list*.