DateTimeTest.java

package marubinotto.util.time;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.io.File;

import junitx.framework.Assert;

import org.apache.commons.io.FileUtils;
import org.junit.After;
import org.junit.Test;

/**
 * @see DateTime
 */
public class DateTimeTest {

	@After
	public void clearCurrentTimeForTest() throws Exception {
		DateTime.setCurrentTimeForTest(null);
	}

	@Test
	public void parseDateStringViaConstructor() throws Exception {
		// When
		DateTime dateTime = new DateTime("1975-08-01 15:03:21",
			"yyyy-MM-dd HH:mm:ss");

		// Then
		assertEquals(1975, dateTime.getYear());
		assertEquals(8, dateTime.getMonth());
		assertEquals(1, dateTime.getDayOfMonth());
		assertEquals(15, dateTime.getHourOfDay());
		assertEquals(03, dateTime.getMinute());
		assertEquals(21, dateTime.getSecond());
	}

	@Test
	public void isSameMonth() throws Exception {
		DateTime x = new DateTime(2005, 1, 1);
		DateTime y = new DateTime(2005, 1, 2);
		assertTrue(x.isSameMonth(y));

		x = new DateTime(2005, 1, 1);
		y = new DateTime(2005, 2, 1);
		assertFalse(x.isSameMonth(y));
	}

	@Test
	public void isSameDay() throws Exception {
		// Case the same day
		DateTime x = new DateTime(2005, 10, 21, 21, 31, 4);
		DateTime y = new DateTime(2005, 10, 21, 11, 12, 24);
		assertTrue(x.isSameDay(y));

		// Case different days
		x = new DateTime(2005, 10, 21);
		y = new DateTime(2005, 10, 22);
		assertFalse(x.isSameDay(y));
	}

	@Test
	public void startAndEndInstanceOfTheDay() throws Exception {
		// Given
		DateTime dateTime = new DateTime("1975-08-01 15:03:21",
			"yyyy-MM-dd HH:mm:ss");

		// When & Then
		assertEquals("1975-08-01 00:00:00.0", dateTime.getStartInstantOfDay()
			.format("yyyy-MM-dd HH:mm:ss.S"));
		assertEquals("1975-08-01 23:59:59.999", dateTime.getEndInstantOfDay()
			.format("yyyy-MM-dd HH:mm:ss.S"));
	}

	@Test
	public void addOneHour() throws Exception {
		// Given
		DateTime dateTime = new DateTime("1975-08-01 15:03:21",
			"yyyy-MM-dd HH:mm:ss");

		// When & Then
		assertEquals("1975-08-01 16:03:21",
			dateTime.addHours(1).format("yyyy-MM-dd HH:mm:ss"));
	}

	@Test
	public void addOneMinute() throws Exception {
		// Given
		DateTime dateTime = new DateTime("1975-08-01 15:03:21",
			"yyyy-MM-dd HH:mm:ss");

		// When & Then
		assertEquals("1975-08-01 15:04:21",
			dateTime.addMinutes(1).format("yyyy-MM-dd HH:mm:ss"));
	}

	@Test
	public void addOneMinuteTo59() throws Exception {
		// Given
		DateTime dateTime = new DateTime("1975-08-01 15:59:21",
			"yyyy-MM-dd HH:mm:ss");

		// When & Then
		assertEquals("1975-08-01 16:00:21",
			dateTime.addMinutes(1).format("yyyy-MM-dd HH:mm:ss"));
	}

	@Test
	public void addMinusOneMinute() throws Exception {
		// Given
		DateTime dateTime = new DateTime("1975-08-01 15:03:21",
			"yyyy-MM-dd HH:mm:ss");

		// When & Then
		assertEquals("1975-08-01 15:02:21",
			dateTime.addMinutes(-1).format("yyyy-MM-dd HH:mm:ss"));
	}

	@Test
	public void addZeroMinute() throws Exception {
		DateTime dateTime = new DateTime("1975-08-01 15:03:21",
			"yyyy-MM-dd HH:mm:ss");
		assertEquals("1975-08-01 15:03:21",
			dateTime.addMinutes(0).format("yyyy-MM-dd HH:mm:ss"));
	}

	@Test
	public void setCurrentTimeForTest() throws Exception {
		DateTime dateTime = new DateTime("1975-08-01 15:03:21.0",
			"yyyy-MM-dd HH:mm:ss.S");
		DateTime.setCurrentTimeForTest(dateTime);
		assertEquals("1975-08-01 15:03:21.0",
			DateTime.getCurrentTime().format("yyyy-MM-dd HH:mm:ss.S"));
	}

	@Test
	public void setCurrentTimeForTestWithFile() throws Exception {
		DateTime.setCurrentTimeForTest(null);

		File currentTimeFile = FileUtils.toFile(DateTime.class.getClassLoader()
			.getResource("current-time"));
		FileUtils.writeStringToFile(currentTimeFile, "1971-06-14 12:20:23.6");

		assertEquals("1971-06-14 12:20:23.6",
			DateTime.getCurrentTime().format("yyyy-MM-dd HH:mm:ss.S"));
	}

	@Test
	public void clearCurrentTimeFile() throws Exception {
		DateTime.setCurrentTimeForTest(null);

		File currentTimeFile = FileUtils.toFile(DateTime.class.getClassLoader()
			.getResource("current-time"));
		FileUtils.writeStringToFile(currentTimeFile, "1971-06-14 12:20:23.6");

		DateTime.clearCurrentTimeFile();

		Assert.assertNotEquals("1971-06-14 12:20:23.6", DateTime.getCurrentTime()
			.format("yyyy-MM-dd HH:mm:ss.S"));
	}

	@Test
	public void getCurrentTime() throws Exception {
		DateTime.setCurrentTimeForTest(null);
		DateTime.clearCurrentTimeFile();

		Interval interval = new Interval(
			new DateTime(System.currentTimeMillis()).addHours(-1), new DateTime(
				System.currentTimeMillis()).addHours(1));
		assertTrue(interval.containsInstant(DateTime.getCurrentTime()));
	}

	@Test
	public void formatAsISO8601() throws Exception {
		System.out.println(DateTime.getCurrentTime().formatAsISO8601());
	}
}