String scrollId = "test_scroll_id";
        SuggestUtil.deleteScrollContext(client, scrollId);
        // No exception should be thrown
    }

    @Test
    public void testEscapeWildcardQuery() {
        // Test escaping asterisk
        String query1 = "test*query";
        String escaped1 = SuggestUtil.escapeWildcardQuery(query1);
        assertEquals("test\\*query", escaped1);