From c5ba3855b582eac2d8be27fd378f075f26132a32 Mon Sep 17 00:00:00 2001
From: Jakob Scheid <jakob.scheid@icloud.com>
Date: Thu, 2 Apr 2026 14:21:32 +0200
Subject: [PATCH] Add tests for jeb_utils.utils.get_next_lower_integer_multiple

---
 .../test_get_next_lower_integer_multiple.py   | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 tests/unit/utils/test_get_next_lower_integer_multiple.py

diff --git a/tests/unit/utils/test_get_next_lower_integer_multiple.py b/tests/unit/utils/test_get_next_lower_integer_multiple.py
new file mode 100644
index 0000000..1f97e09
--- /dev/null
+++ b/tests/unit/utils/test_get_next_lower_integer_multiple.py
@@ -0,0 +1,46 @@
+from src.jeb_utils.utils import get_next_lower_integer_multiple
+import pytest
+
+@pytest.mark.parametrize('value,multiple,expected', [
+    (1, 1, 1),
+    (2, 1, 2),
+    (3, 1, 3),
+    (1, 2, 0),
+    (1, 2, 0),
+    (58, 42, 42),
+    (125, 42, 84),
+    (126, 42, 126),
+    (127, 42, 126),
+
+    (-1, -1, -1),
+    (-2, -1, -2),
+    (-3, -1, -3),
+    (-1, -2, 0),
+    (-1, -2, 0),
+    (-58, -42, -42),
+    (-125, -42, -84),
+    (-126, -42, -126),
+    (-127, -42, -126),
+
+    (-1, 1, -1),
+    (-2, 1, -2),
+    (-3, 1, -3),
+    (-1, 2, 0),
+    (-1, 2, 0),
+    (-58, 42, -42),
+    (-125, 42, -84),
+    (-126, 42, -126),
+    (-127, 42, -126),
+])
+def test_get_next_lower_integer_multiple(value, multiple, expected):
+    assert get_next_lower_integer_multiple(value, multiple) == expected
+
+@pytest.mark.parametrize('value,multiple,expected_exception', [
+    (1, 0, ZeroDivisionError),
+    (2, 0, ZeroDivisionError),
+    (0, 0, ZeroDivisionError),
+    (-1, 0, ZeroDivisionError),
+])
+def test_get_next_lower_integer_multiple(value, multiple, expected_exception):
+    with pytest.raises(expected_exception):
+        get_next_lower_integer_multiple(value, multiple)
\ No newline at end of file