Add tests for jeb_utils.utils.find_nearest_lower_number

tests/unit/utils/test_find_nearest_lower_number.py

@@ -0,0 +1,18 @@
+from src.jeb_utils.utils import find_nearest_lower_number
+import pytest
+
+@pytest.mark.parametrize('number_list,target,expected', [
+    ([1, 2, 3], 2, 2),
+    ([1, 2, 3], 3, 3),
+    ([1, 2, 3], 0, None),
+    ([1, 2, 3], 4, 3),
+    ([], 0, None),
+    ([], 1, None),
+    ([], 2, None),
+    ([], 42, None),
+    ([1], 42, 1),
+    ([1], 1, 1),
+    ([1], 0, None),
+])
+def test_find_nearest_lower_number(number_list, target, expected):
+    assert find_nearest_lower_number(number_list, target) == expected