PermisFieldEditorTest.java

package net.courtanet.fm.core.editor;

import static org.fest.assertions.Assertions.assertThat;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.junit.Before;
import org.junit.Test;

public class PermisFieldEditorTest {
    private static final DateFormat FORMAT_ISO = new SimpleDateFormat("yyyyMMdd");

    @Test
    public void test() {
        Date dateNaissance = getDate("19800229");
        Date datePermis = getDate("19980201");

        boolean assezAgeADateDuPermis = isAssezAgeADateDuPermis(dateNaissance, datePermis, 18);

        assertThat(assezAgeADateDuPermis).isTrue();
    }

    public boolean isAssezAgeADateDuPermis(Date naissance, Date datePermis, int ageMinimum) {
        if (naissance == null || datePermis == null) {
            return true;
        }
        Date borneMin = new Date(naissance.getTime());
        borneMin = addMonths(borneMin, ageMinimum * 12);
        // System.out.println(borneMin);
        setToFirstDayOfMonth(borneMin);
        return compareDays(borneMin, datePermis) <= 0;
    }

    public Date getDate(String yyyyMMdd) {
        if (yyyyMMdd == null) {
            return null;
        }
        try {
            return FORMAT_ISO.parse(yyyyMMdd);
        } catch (ParseException e) {
            return null;
        }
    }

    public Date addMonths(Date date, int monthsToAdd) {
        Date newDate = new Date(date.getTime());
        newDate.setMonth(date.getMonth() + monthsToAdd);
        return newDate;
    }

    public void setToFirstDayOfMonth(Date date) {
        date.setDate(1);
    }

    public final int compareDays(Date a, Date b) {
        if (a == null)
            return -1;
        if (b == null)
            return 1;
        int compYear = a.getYear() - b.getYear();
        if (0 == compYear) {
            int compMonth = a.getMonth() - b.getMonth();
            if (0 == compMonth) {
                return a.getDate() - b.getDate();
            }
            return compMonth;
        }
        return compYear;
    }
}