Java Date API benchmark

JavaDateAPIBenchmark.java

import static com.unimondes.dsl.DateDsl.*;
import static com.unimondes.dsl.DateDsl.Months.*;
import static org.junit.Assert.assertEquals;

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

import org.joda.time.DateTime;
import org.junit.Test;

public class Benchmark {
	public static void benchmarkNow() {
		Date now;

		// DateDSL
		now = now().toDate();
		assertIsNow(now);

		// java.util.Date
		now = new Date();
		assertIsNow(now);

		// java.util.Calendar
		now = Calendar.getInstance().getTime();
		assertIsNow(now);

		// joda-time
		now = new DateTime().toDate();
		assertIsNow(now);
	}

	@Test
	public void benchmarkClearTime() {
		Date noTime;

		// DateDSL
		noTime = now().clearTime().toDate();
		assertNoTime(noTime);

		// java.util.Date
		// noWay noTime = new Date();

		// java.util.Calendar
		Calendar cal = Calendar.getInstance();
		cal.set(Calendar.HOUR_OF_DAY, 0);
		cal.set(Calendar.MINUTE, 0);
		cal.set(Calendar.SECOND, 0);
		cal.set(Calendar.MILLISECOND, 0);
		noTime = cal.getTime();
		assertNoTime(noTime);

		// joda-time
		noTime = new DateTime().toDateMidnight().toDate();
		assertNoTime(noTime);
	}

	@SuppressWarnings("deprecation")
	@Test
	public void benchmarkGivenDate() {
		Date givenDate;

		// DateDSL
		givenDate = date(2003, JANUARY, 10, 12, 0, 0, 0).toDate();
		assert10Jan2003(givenDate);

		// java.util.Date
		givenDate = new Date(103, 0, 10, 12, 0);
		assert10Jan2003(givenDate);

		// java.util.Calendar
		Calendar cal = Calendar.getInstance();
		cal.set(Calendar.YEAR, 2003);
		cal.set(Calendar.MONTH, Calendar.JANUARY);
		cal.set(Calendar.DAY_OF_MONTH, 10);
		cal.set(Calendar.HOUR_OF_DAY, 12);
		cal.set(Calendar.MINUTE, 0);
		cal.set(Calendar.SECOND, 0);
		cal.set(Calendar.MILLISECOND, 0);
		givenDate = cal.getTime();
		assert10Jan2003(givenDate);

		// joda-time
		givenDate = new DateTime(2003, 1, 10, 12, 0, 0, 0).toDate();
		assert10Jan2003(givenDate);
	}

	@Test
	public void benchmarkMath() {
		Date givenDate;

		// DateDSL
		givenDate = date().add(minutes(10)).toDate();
		assert10minutesInFuture(givenDate);

		// java.util.Date
		// no way = new Date(103, 0, 10, 12, 0);

		// java.util.Calendar
		Calendar cal = Calendar.getInstance();
		cal.add(Calendar.MINUTE, 10);
		givenDate = cal.getTime();
		assert10minutesInFuture(givenDate);

		// joda-time
		givenDate = new DateTime().plusMinutes(10).toDate();
		assert10minutesInFuture(givenDate);
	}

	@Test
	public void benchmarkFirstMoment() {
		Date dayOne;

		// DateDSL
		dayOne = date().firstDayOfMonth().clearTime().toDate();
		// CO0OL date().firstDayOfNextMonth().toDate();
		assertFirstMoment(dayOne);

		// java.util.Date
		// no way = new Date(103, 0, 10, 12, 0);

		// java.util.Calendar
		Calendar cal = Calendar.getInstance();
		cal.set(Calendar.DAY_OF_MONTH, 1);
		cal.set(Calendar.HOUR_OF_DAY, 0);
		cal.set(Calendar.MINUTE, 0);
		cal.set(Calendar.SECOND, 0);
		cal.set(Calendar.MILLISECOND, 0);
		dayOne = cal.getTime();
		assertFirstMoment(dayOne);

		// joda-time
		dayOne = new DateTime().withDayOfMonth(1).toDateMidnight().toDate();
		assertFirstMoment(dayOne);
	}

	@Test
	public void benchmarkLastMoment() {
		Date lastDay;

		// DateDSL
		lastDay = date().lastDayOfMonth().lastTime().toDate();
		// CO00OL date().lastDayOfNextMonth().toDate();
		assertLastMoment(lastDay);

		// java.util.Date
		// no way = new Date(103, 0, 10, 12, 0);

		// java.util.Calendar
		Calendar cal = Calendar.getInstance();
		cal.set(Calendar.DAY_OF_MONTH,
				cal.getActualMaximum(Calendar.DAY_OF_MONTH));
		cal.set(Calendar.HOUR_OF_DAY, 23);
		cal.set(Calendar.MINUTE, 59);
		cal.set(Calendar.SECOND, 59);
		cal.set(Calendar.MILLISECOND, 999);
		lastDay = cal.getTime();
		assertLastMoment(lastDay);

		// joda-time
		lastDay = new DateTime().withDayOfMonth(1).plusMonths(1).withMillisOfDay(0).minusMillis(1)
				.toDate();
		assertLastMoment(lastDay);
	}
}