DateToStringConverterTest.java

/*******************************************************************************
 * Copyright (c) 2007, 2014 compeople AG and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    compeople AG - initial API and implementation
 *******************************************************************************/
package org.eclipse.riena.ui.ridgets.databinding;

import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

import junit.framework.TestCase;

import org.eclipse.riena.core.test.collect.NonUITestCase;

/**
 * Tests for the classes {@link DateToStringConverter} and
 * {@link StringToDateConverter}.
 */
@NonUITestCase
public class DateToStringConverterTest extends TestCase {

	public void testConvertToString() {
		final DateToStringConverter converter = new DateToStringConverter("MM/dd/yyyy");

		Object result = converter.convert(null);
		assertEquals(null, result);

		result = converter.convert(localize(0L));
		assertEquals("01/01/1970", result); //$NON-NLS-1$

		final Date date = localize(1221011682194L);
		result = converter.convert(date);
		assertEquals("09/10/2008", result);
	}

	public void testConvertToDateNoTimezone() {
		final StringToDateConverter converter = new StringToDateConverter("MM/dd/yyyy");

		Date result = (Date) converter.convert(null);
		assertEquals(null, result);

		result = (Date) converter.convert("01/01/1970");
		@SuppressWarnings("deprecation")
		final int offset = result.getTimezoneOffset() * 60 * 1000;
		assertEquals(0 + offset, result.getTime());
	}

	public void testConvertToDateGMT() {
		final StringToDateConverter converter = new StringToDateConverter("MM/dd/yyyy zzz");

		Date result = (Date) converter.convert(null);
		assertEquals(null, result);

		result = (Date) converter.convert("01/01/1970 GMT");
		assertEquals(0, result.getTime());
	}

	public void testConvertToDateGMTPlusTwo() {
		final StringToDateConverter converter = new StringToDateConverter("MM/dd/yyyy zzzzz");

		Date result = (Date) converter.convert(null);
		assertEquals(null, result);

		result = (Date) converter.convert("01/01/1970 +0200");
		assertEquals(3600000 * -2, result.getTime());
	}

	public void testConvertToDateExact() {
		final StringToDateConverter converter = new StringToDateConverter("MM/dd/yyyy HH:mm:ss:SSS zzz");

		final Date result1 = (Date) converter.convert("07/10/1996 16:05:28:046 PDT");
		assertEquals(837039928046L, result1.getTime());

		final Date result2 = (Date) converter.convert("01/01/1970 00:00:00:000 GMT");
		assertEquals(0L, result2.getTime());
	}

	public void testToStringAndBack() {
		final DateToStringConverter toString = new DateToStringConverter("MM/dd/yyyy");
		final StringToDateConverter toDate = new StringToDateConverter("MM/dd/yyyy");

		final Date input = localize(0L);
		final Date result = (Date) toDate.convert(toString.convert(input));
		assertEquals(input.getTime(), result.getTime());
	}

	public void testToDateAndBack() {
		final DateToStringConverter toString = new DateToStringConverter("MM/dd/yyyy");
		final StringToDateConverter toDate = new StringToDateConverter("MM/dd/yyyy");

		final String result = (String) toString.convert(toDate.convert("01/01/1970"));
		assertEquals("01/01/1970", result);
	}

	public void testDateToStringLocal1() {
		final Calendar calendarInstance = Calendar.getInstance();
		calendarInstance.set(2010, 10, 12, 0, 0, 0);
		calendarInstance.setTimeZone(TimeZone.getDefault());
		final Date date = calendarInstance.getTime();

		final DateToStringConverter dateToStringConverter = new DateToStringConverter("dd.MM.yyyy HH:mm:ss");
		final String dateAsString = (String) dateToStringConverter.convert(date);
		assertEquals("12.11.2010 00:00:00", dateAsString);
	}

	public void testDateToStringLocal2() {
		final Calendar calendarInstance = Calendar.getInstance();
		calendarInstance.set(2010, 10, 12, 0, 0, 0);
		calendarInstance.setTimeZone(TimeZone.getDefault());
		final Date date = calendarInstance.getTime();

		final DateToStringConverter dateToStringConverter = new DateToStringConverter("dd.MM.yyyy HH:mm:ss"); //$NON-NLS-1$
		final String dateAsString = (String) dateToStringConverter.convert(date);
		//		if ("America/Los_Angeles".equals(TimeZone.getDefault().getID())) { //$NON-NLS-1$
		//			assertEquals("12.11.2010 00:00:00 PST", dateAsString);
		//		} else {
		//			assertEquals("12.11.2010 00:00:00 CET", dateAsString);
		//		}
		assertEquals("12.11.2010 00:00:00", dateAsString);
	}

	// helping methods
	//////////////////

	@SuppressWarnings("deprecation")
	private Date localize(final long msSinceEpochUtc) {
		final Date localDate = new Date(msSinceEpochUtc);
		return new Date(localDate.getTime() + (60 * 1000 * localDate.getTimezoneOffset()));
	}
}