here is the code block. can you give me some test case for this
"""
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateUtils {
    public static NAME_1 formatDate(Date date) {
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        return formatter.format(date);
    }
}
""" Your answer should have exactly 6 paragraphs. Make sure that the last paragraph starts with the word "regularly" and that each paragraph is separated by two new lines.
user