test/jdk/java/util/Calendar/bug4100311.java

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/*
 * @test
 * @bug 4100311
 * @summary Ensure set(DAY_OF_YEAR, 1) works.
 * @run junit bug4100311
 */

import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.Date;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class bug4100311 {

    // GregorianCalendar should be able to date to january 1st properly
    @SuppressWarnings("deprecation")
    @Test
    public void dayOfYearIsOneTest() {
        GregorianCalendar cal = new GregorianCalendar();
        cal.set(Calendar.YEAR, 1997);
        cal.set(Calendar.DAY_OF_YEAR, 1);
        Date d = cal.getTime();
        assertEquals(0, d.getMonth(), "Date: "+d+" isn't January 1st");
        assertEquals(1, d.getDate(),"Date: "+d+" isn't January 1st");
    }
}