Max sub-array slidey window

leetcode/test_stuff.py

@@ -444,3 +444,24 @@ def test_trie_busy():
     assert trie.startsWith("rent") is True
     assert trie.startsWith("beer") is True
     assert trie.startsWith("jam") is True
+
+
+@pytest.mark.parametrize(
+    ("nums", "expected"),
+    [
+        (
+            [-2, 1, -3, 4, -1, 2, 1, -5, 4],
+            6,
+        ),
+        (
+            [1],
+            1,
+        ),
+        (
+            [5, 4, -1, 7, 8],
+            23,
+        ),
+    ],
+)
+def test_maximum_subarray(nums: list[int], expected: int):
+    assert stuff.sum_max_sub_array(nums) == expected