package com.google.gdata.data;

import static org.junit.Assert.*;

import org.junit.Test;

import com.google.gdata.util.ParseException;

public class TestDateTime {

	private static String invalidDate = "abort";
	private static String validDate = "2002-09-24";
	private static String validDateWithTimezone = "2002-09-24-00:01";
	private static String validDateTime = "2002-09-24T06:00:00.0";
	private static String validRfcString = "Wed, 02 Oct 2002 13:00:00 GMT";
	
	@Test
	public void parseDateTest() {
		boolean numberFormatException = false;
		try {
			DateTime.parseDate(invalidDate);
		} catch(NumberFormatException e) {
			numberFormatException = true;
		}
		assertTrue(numberFormatException);
		
		DateTime dt = DateTime.parseDate(validDate);
		assertNull(dt.tzShift);
		
		dt = DateTime.parseDate(validDateWithTimezone);
		assertEquals(dt.tzShift.intValue(), -1);
	}

	@Test
	public void parseDateTimeTest() {
		boolean numberFormatException = false;
		try {
			DateTime.parseDateTime(invalidDate);
		} catch(NumberFormatException e) {
			numberFormatException = true;
		}
		assertTrue(numberFormatException);
		
		numberFormatException = false;
		
		DateTime dt = null;
		try {
			dt = DateTime.parseDateTime(validDate);
		} catch(NumberFormatException e) {
			numberFormatException = true;
		}
		assertTrue(numberFormatException);
		assertNull(dt);
		
		dt = DateTime.parseDateTime(validDateTime);
		assertNotNull(dt);
	}
	
	@Test
	public void parseDateTimeChoiceTest() {
		boolean numberFormatException = false;
		try {
			DateTime.parseDateTimeChoice(invalidDate);
		} catch(NumberFormatException e) {
			numberFormatException = true;
		}
		assertTrue(numberFormatException);
		
		DateTime dt = DateTime.parseDateTimeChoice(validDate);
		assertNull(dt.tzShift);
		
		dt = DateTime.parseDateTimeChoice(validDateTime);
		assertNotNull(dt);
	}
	
	@Test
	public void parseRfc822Test() {
		boolean exception = false;
		try {
			DateTime.parseRfc822(validDate);
		} catch(ParseException e) {
			exception = true;
		}
		assertTrue(exception);
		
		exception = false;
		try {
			DateTime.parseRfc822(validRfcString);
		} catch (ParseException e) {
			exception = true;
		}
		assertFalse(exception);
	}
	
	@Test
	public void compareToTest() {
		DateTime dt1 = DateTime.parseDate("2002-09-24");
		DateTime dt2 = DateTime.parseDate("2002-09-24");
		assertTrue(dt1.compareTo(dt2) == 0);
		dt2 = DateTime.parseDate("2002-09-23");
		assertTrue(dt1.compareTo(dt2) > 0);
		dt2 = DateTime.parseDate("2002-09-26");
		assertTrue(dt1.compareTo(dt2) < 0);
	}
	
	@Test
	public void toUiStringTest() {
		String dateString = "2002-09-24";
		String dateTimeString = "2002-09-24T06:00:00";
		String expectedDateTimeString = "2002-09-24 06:00";
		DateTime dt = DateTime.parseDate(dateString);
		assertEquals(dateString, dt.toUiString());
		dt = DateTime.parseDateTime(dateTimeString);
		assertEquals(expectedDateTimeString, dt.toUiString());
	}
	@Test
	public void toStringRfc822Test() {
		String dateTimeString = "2002-09-24T06:00:00";
		String expectedDateTimeString = "Tue, 24 Sep 2002 06:00:00 +0000";
		DateTime dt = DateTime.parseDateTime(dateTimeString);
		assertEquals(expectedDateTimeString, dt.toStringRfc822());
	}
}