feat(content): more test cases

backend/data/questions/spiral-matrix.yaml

@@ -8,6 +8,24 @@ categories:
 patterns:
   - matrix-traversal
 
+function_signature: "def spiral_order(matrix: list[list[int]]) -> list[int]:"
+
+test_cases:
+  visible:
+    - input: { matrix: [[1, 2, 3], [4, 5, 6], [7, 8, 9]] }
+      expected: [1, 2, 3, 6, 9, 8, 7, 4, 5]
+    - input: { matrix: [[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12]] }
+      expected: [1, 2, 3, 4, 8, 12, 11, 10, 9, 5, 6, 7]
+  hidden:
+    - input: { matrix: [[1]] }
+      expected: [1]
+    - input: { matrix: [[1, 2, 3, 4]] }
+      expected: [1, 2, 3, 4]
+    - input: { matrix: [[1], [2], [3]] }
+      expected: [1, 2, 3]
+    - input: { matrix: [[1, 2], [3, 4]] }
+      expected: [1, 2, 4, 3]
+
 description: |
   Given an `m x n` `matrix`, return *all elements of the matrix in spiral order*.