package org.djunits.unit;
   
   import static org.junit.Assert.assertEquals;
   import static org.junit.Assert.assertTrue;
   
   import java.util.Locale;
   
   import org.djunits.unit.unitsystem.UnitSystem;
   import org.junit.Before;
  import org.junit.Test;
  
  /**
   * <p>
   * Copyright (c) 2013-2023 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 PositionUnitTest extends AbstractOffsetUnitTest<PositionUnit>
  {
      /**
       * Set the locale to "en" so we know what texts should be retrieved from the resources.
       */
      @Before
      public final void setup()
      {
          Locale.setDefault(new Locale("en"));
      }
  
      /**
       * Verify conversion factors, English names and abbreviations.
       */
      @Test
      public final void conversions()
      {
          assertEquals("m", PositionUnit.DEFAULT.getQuantity().getSiDimensions().toString(true, false));
          checkUnitRatioOffsetNameAndAbbreviation(PositionUnit.METER, 1, 0.0, 0.00000001, "meter", "m");
          checkUnitRatioOffsetNameAndAbbreviation(PositionUnit.MILE, 1609.34, 0.0, 0.05, "mile", "mi");
          checkUnitRatioOffsetNameAndAbbreviation(PositionUnit.FOOT, 0.3048, 0.0, 0.001, "foot", "ft");
          // Check two conversions between non-standard units
          assertEquals("one FOOT is 0.3048 METER", 0.3048, getMultiplicationFactorTo(PositionUnit.FOOT, PositionUnit.METER),
                  0.0001);
          assertEquals("one LIGHTYEAR is about 9.461E12 KILOMETER", 9.461E12,
                  getMultiplicationFactorTo(PositionUnit.LIGHTYEAR, PositionUnit.KILOMETER), 1E9);
  
          // TODO: other units
      }
  
      /**
       * Verify that we can create our own PositionUnit.
       */
      @Test
      public final void createPositionUnit()
      {
          PositionUnit myUnit =
                  PositionUnit.DEFAULT.deriveLinearOffset(1.23, 0.0, LengthUnit.METER, "my", "myPosition", UnitSystem.OTHER);
          assertTrue("Can create a new PositionUnit", null != myUnit);
          checkUnitRatioOffsetNameAndAbbreviation(myUnit, 1.23, 0.0, 0.0001, "myPosition", "my");
          PositionUnit.BASE.unregister(myUnit);
      }
  
      /**
       * Verify relative base unit.
       */
      @Test
      public final void testRelative()
      {
          assertEquals(LengthUnit.BASE, PositionUnit.DEFAULT.getRelativeQuantity());
      }
  
  }