/*
    * Copyright (C) 2011, Matthias Sohn <matthias.sohn@sap.com>
    * and other copyright owners as documented in the project's IP log.
    *
    * This program and the accompanying materials are made available
    * under the terms of the Eclipse Distribution License v1.0 which
    * accompanies this distribution, is reproduced below, and is
    * available at http://www.eclipse.org/org/documents/edl-v10.php
    *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or
   * without modification, are permitted provided that the following
   * conditions are met:
   *
   * - Redistributions of source code must retain the above copyright
   *   notice, this list of conditions and the following disclaimer.
   *
   * - Redistributions in binary form must reproduce the above
   *   copyright notice, this list of conditions and the following
   *   disclaimer in the documentation and/or other materials provided
   *   with the distribution.
   *
   * - Neither the name of the Eclipse Foundation, Inc. nor the
   *   names of its contributors may be used to endorse or promote
   *   products derived from this software without specific prior
   *   written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
   * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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  package org.eclipse.jgit.util;
  
  import static org.eclipse.jgit.util.RelativeDateFormatter.DAY_IN_MILLIS;
  import static org.eclipse.jgit.util.RelativeDateFormatter.HOUR_IN_MILLIS;
  import static org.eclipse.jgit.util.RelativeDateFormatter.MINUTE_IN_MILLIS;
  import static org.eclipse.jgit.util.RelativeDateFormatter.SECOND_IN_MILLIS;
  import static org.eclipse.jgit.util.RelativeDateFormatter.YEAR_IN_MILLIS;
  import static org.junit.Assert.assertEquals;
  
  import java.util.Date;
  
  import org.eclipse.jgit.junit.MockSystemReader;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  public class RelativeDateFormatterTest {
  
  	@Before
  	public void setUp() {
  		SystemReader.setInstance(new MockSystemReader());
  	}
  
  	@After
  	public void tearDown() {
  		SystemReader.setInstance(null);
  	}
  
  	private static void assertFormat(long ageFromNow, long timeUnit,
  			String expectedFormat) {
  		Date d = new Date(SystemReader.getInstance().getCurrentTime()
  				- ageFromNow * timeUnit);
  		String s = RelativeDateFormatter.format(d);
  		assertEquals(expectedFormat, s);
  	}
  
  	@Test
  	public void testFuture() {
  		assertFormat(-100, YEAR_IN_MILLIS, "in the future");
  		assertFormat(-1, SECOND_IN_MILLIS, "in the future");
  	}
  
  	@Test
  	public void testFormatSeconds() {
  		assertFormat(1, SECOND_IN_MILLIS, "1 seconds ago");
  		assertFormat(89, SECOND_IN_MILLIS, "89 seconds ago");
  	}
  
  	@Test
  	public void testFormatMinutes() {
  		assertFormat(90, SECOND_IN_MILLIS, "2 minutes ago");
  		assertFormat(3, MINUTE_IN_MILLIS, "3 minutes ago");
  		assertFormat(60, MINUTE_IN_MILLIS, "60 minutes ago");
  		assertFormat(89, MINUTE_IN_MILLIS, "89 minutes ago");
  	}
  
  	@Test
 	public void testFormatHours() {
 		assertFormat(90, MINUTE_IN_MILLIS, "2 hours ago");
 		assertFormat(149, MINUTE_IN_MILLIS, "2 hours ago");
 		assertFormat(35, HOUR_IN_MILLIS, "35 hours ago");
 	}
 
 	@Test
 	public void testFormatDays() {
 		assertFormat(36, HOUR_IN_MILLIS, "2 days ago");
 		assertFormat(13, DAY_IN_MILLIS, "13 days ago");
 	}
 
 	@Test
 	public void testFormatWeeks() {
 		assertFormat(14, DAY_IN_MILLIS, "2 weeks ago");
 		assertFormat(69, DAY_IN_MILLIS, "10 weeks ago");
 	}
 
 	@Test
 	public void testFormatMonths() {
 		assertFormat(70, DAY_IN_MILLIS, "2 months ago");
 		assertFormat(75, DAY_IN_MILLIS, "3 months ago");
 		assertFormat(364, DAY_IN_MILLIS, "12 months ago");
 	}
 
 	@Test
 	public void testFormatYearsMonths() {
 		assertFormat(366, DAY_IN_MILLIS, "1 year ago");
 		assertFormat(380, DAY_IN_MILLIS, "1 year, 1 month ago");
 		assertFormat(410, DAY_IN_MILLIS, "1 year, 2 months ago");
 		assertFormat(2, YEAR_IN_MILLIS, "2 years ago");
 	}
 
 	@Test
 	public void testFullYearMissingSomeDays() {
 		// avoid "x year(s), 12 months", as humans would always round this up to
 		// "x+1 years"
 		assertFormat(5 * 365 + 1, DAY_IN_MILLIS, "5 years ago");
 		assertFormat(2 * 365 - 10, DAY_IN_MILLIS, "2 years ago");
 	}
 
 	@Test
 	public void testFormatYears() {
 		assertFormat(5, YEAR_IN_MILLIS, "5 years ago");
 		assertFormat(60, YEAR_IN_MILLIS, "60 years ago");
 	}
 }