jinja : fix negative step slice with start/stop values (#24580)

2026-06-13 18:28:40 +02:00
parent e8067a8b36
commit f05cf4676a
3 changed files with 23 additions and 5 deletions
@@ -435,6 +435,24 @@ static void test_expressions(testing & t) {
        "('c', 'b', 'a')"
    );

+    test_template(t, "string slice negative step",
+        "{{ 'abcdef'[::-2] }}",
+        json::object(),
+        "fdb"
+    );
+
+    test_template(t, "string slice negative start and step",
+        "{{ 'abcdef'[-1:1:-1] }}",
+        json::object(),
+        "fedc"
+    );
+
+    test_template(t, "string slice negative start, stop and step",
+        "{{ 'abcdef'[-1:-5:-1] }}",
+        json::object(),
+        "fedc"
+    );
+
    test_template(t, "arithmetic",
        "{{ (a + b) * c }}",
        {{"a", 2}, {"b", 3}, {"c", 4}},