feat(content): hidden test cases

backend/data/questions/sort-an-array.yaml

@@ -10,6 +10,28 @@ categories:
 patterns:
   - dynamic-programming
 
+function_signature: "def sort_array(nums: list[int]) -> list[int]:"
+
+test_cases:
+  visible:
+    - input: { nums: [5, 2, 3, 1] }
+      expected: [1, 2, 3, 5]
+    - input: { nums: [5, 1, 1, 2, 0, 0] }
+      expected: [0, 0, 1, 1, 2, 5]
+  hidden:
+    - input: { nums: [1] }
+      expected: [1]
+    - input: { nums: [2, 1] }
+      expected: [1, 2]
+    - input: { nums: [1, 2, 3, 4, 5] }
+      expected: [1, 2, 3, 4, 5]
+    - input: { nums: [5, 4, 3, 2, 1] }
+      expected: [1, 2, 3, 4, 5]
+    - input: { nums: [-1, 0, 1, -5, 3] }
+      expected: [-5, -1, 0, 1, 3]
+    - input: { nums: [3, 3, 3, 3] }
+      expected: [3, 3, 3, 3]
+
 description: |
   Given an array of integers `nums`, sort the array in ascending order and return it.