package org.djunits.unit;
   
   import static org.junit.Assert.assertEquals;
   import static org.junit.Assert.assertTrue;
   
   import java.util.Locale;
   
   import org.djunits.locale.DefaultLocale;
   import org.djunits.unit.unitsystem.UnitSystem;
  import org.junit.Before;
  import org.junit.Test;
  
  /**
   * <p>
   * Copyright (c) 2013-2020 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
   * BSD-style license. See <a href="https://djunits.org/docs/license.html">DJUNITS License</a>.
   * <p>
   * @author <a href="https://tudelft.nl/pknoppers">Peter Knoppers</a>
   */
  public class TimeUnitTest extends AbstractOffsetUnitTest<TimeUnit>
  {
      /**
       * Set the locale to "en" so we know what texts should be retrieved from the resources.
       */
      @Before
      public final void setup()
      {
          DefaultLocale.setLocale(new Locale("en"));
      }
  
      /**
       * Verify conversion factors, English names and abbreviations.
       */
      @Test
      public final void conversions()
      {
          assertEquals("s", TimeUnit.DEFAULT.getQuantity().getSiDimensions().toString(true, false));
          checkUnitRatioOffsetNameAndAbbreviation(TimeUnit.BASE_SECOND, 1, 0.0, 0.00000001, "second", "s");
          checkUnitRatioOffsetNameAndAbbreviation(TimeUnit.BASE_HOUR, 3600, 0.0, 0.0005, "hour", "h");
          checkUnitRatioOffsetNameAndAbbreviation(TimeUnit.BASE_DAY, 86400, 0.0, 0.001, "day", "day");
          // Check two conversions between non-standard units
          assertEquals("one DAY is 24 HOUR", 24, getMultiplicationFactorTo(TimeUnit.BASE_DAY, TimeUnit.BASE_HOUR), 0.0001);
          assertEquals("one HOUR is about 0.0417 DAY", 0.0417, getMultiplicationFactorTo(TimeUnit.BASE_HOUR, TimeUnit.BASE_DAY),
                  0.0001);
          // Check conversion factor to standard unit for all remaining time units
          checkUnitRatioOffsetNameAndAbbreviation(TimeUnit.BASE_MILLISECOND, 0.001, 0.0, 0.00000001, "millisecond", "ms");
          checkUnitRatioOffsetNameAndAbbreviation(TimeUnit.BASE_MINUTE, 60, 0.0, 0.000001, "minute", "min");
          checkUnitRatioOffsetNameAndAbbreviation(TimeUnit.BASE_WEEK, 7 * 86400, 0.0, 0.1, "week", "wk");
  
          // TODO: shifted units
      }
  
      /**
       * Verify that we can create our own duration unit.
       */
      @Test
      public final void createTimeUnit()
      {
          TimeUnit myTU = TimeUnit.BASE_SECOND.deriveLinearOffset(14.0 * 86400, 0.0, DurationUnit.SECOND, "fn", "Fortnight",
                  UnitSystem.OTHER);
          assertTrue("Can create a new TimeUnit", null != myTU);
          checkUnitRatioOffsetNameAndAbbreviation(myTU, 14 * 86400, 0.0, 1, "Fortnight", "fn");
          TimeUnit.BASE.unregister(myTU);
      }
  
      /**
       * Verify relative base unit.
       */
      @Test
      public final void testRelative()
      {
          assertEquals(DurationUnit.BASE, TimeUnit.DEFAULT.getRelativeQuantity());
      }
  
  }