/**************************************************************************
OmegaT - Computer Assisted Translation (CAT) tool
         with fuzzy matching, translation memory, keyword search,
         glossaries, and translation leveraging into updated projects.

Copyright (C) 2000-2006 Keith Godfrey and Maxym Mykhalchuk
              Home page: http://www.omegat.org/
              Support center: http://groups.yahoo.com/group/OmegaT/

 This file is part of OmegaT.

 OmegaT is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 OmegaT is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
**************************************************************************/

package org.omegat.util;

import static org.junit.Assert.fail;

import java.text.ParseException;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;

import org.junit.Test;

/**
* Tests for (some) static utility methods.
*
* @author Martin Fleurke
*/
public class TMXDateParserTest {

    @Test
    public void testParseDate() {
       TMXDateParser parser = new TMXDateParser();
       //Test parse and toString with proper date string
       String dateString = "19971116T192059Z";//normal time
       Date d=null;
       try {
           d = parser.parse(dateString);
       } catch (ParseException e) {
           fail("Valid date string could not be parsed: "+e.getMessage()+" [for "+dateString+"]");
       }
       String dateString2 = parser.getTMXDate(d);
       if (!dateString.equals(dateString2)) fail("Parsing string to date and back does not give same string");

       //Test parse and toString with proper date string in daylight savings time
       dateString = "19970716T192059Z";
       try {
           d = parser.parse(dateString);
       } catch (ParseException e) {
           fail("Valid date string could not be parsed: "+e.getMessage()+" [for "+dateString+"]");
       }
       dateString2 = parser.getTMXDate(d);
       if (!dateString.equals(dateString2)) fail("Parsing string to date and back does not give same string (for daylight savings time)");

       //Test if same dates but different time zone give equal strings
       GregorianCalendar c = new GregorianCalendar(TimeZone.getTimeZone("-02:00"));
       Date d2 = c.getTime(); //date in time zone -02:00 (hardly used anywhere, so most likely to be unique)
       Date dn = new Date(); //date with whatever time zone user is in (should be different from -02:00.
       dateString = parser.getTMXDate(dn);
       dateString2 = parser.getTMXDate(d2);
       if (!dateString.substring(0,13).equals(dateString2.substring(0,13))) { //taking substring, to prevent seconds to be different because of later creation of Date object
           fail("Two identical dates (in different timezones) do not give the same UTC String: "+dateString+" vs. "+dateString2);
       }

       try {
           parser.parse("19971116T19205Zs"); //hmm, no error, interpreted as '19971116T192005Z' +'s'. should we add a check or not? I think not useful.
       } catch (ParseException e) {
           //exception is good, although we do not get one in this case
       }

       //Test if invalid date (wrong time zone) gives error
       try {
           parser.parse("19971116T192059+00:00");
           fail("Invalid date string 19971116T192059+00:00 is parsed as valid");
       } catch (ParseException e) {}
       //Test if invalid date (too short) gives error
       try {
           parser.parse("19971116T");
           fail("Invalid date string 19971116T is parsed as valid");
       } catch (ParseException e) {}
       //Test if invalid date (null) gives error
       try {
           parser.parse(null);
           fail("Invalid date string null is parsed as valid");
       } catch (ParseException e) {}
       //Test if invalid date ("") gives error
       try {
           parser.parse("");
           fail("Invalid date string '' is parsed as valid");
       } catch (ParseException e) {}
   }
}