package org.djunits.unit;
   
   import static org.junit.jupiter.api.Assertions.assertEquals;
   import static org.junit.jupiter.api.Assertions.assertTrue;
   
   import java.util.Locale;
   
   import org.djunits.unit.unitsystem.UnitSystem;
   import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * <p>
   * Copyright (c) 2013-2025 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 PowerUnitTest extends AbstractLinearUnitTest<PowerUnit>
  {
      /**
       * Set the locale to "en" so we know what texts should be retrieved from the resources.
       */
      @BeforeEach
      public final void setup()
      {
          Locale.setDefault(new Locale("en"));
      }
  
      /**
       * Verify conversion factors, English names and abbreviations.
       */
      @Test
      public final void conversions()
      {
          assertEquals("kgm2/s3", PowerUnit.SI.getQuantity().getSiDimensions().toString(true, false));
          checkUnitRatioNameAndAbbreviation(PowerUnit.WATT, 1, 0.00000001, "watt", "W");
          checkUnitRatioNameAndAbbreviation(PowerUnit.FOOT_POUND_FORCE_PER_HOUR, 0.00037661608333, 0.0000000001,
                  "foot pound-force per hour", "ft.lbf/h");
          checkUnitRatioNameAndAbbreviation(PowerUnit.FOOT_POUND_FORCE_PER_MINUTE, 0.022596965, 0.000001,
                  "foot pound-force per minute", "ft.lbf/min");
          // Check two conversions between non-standard units
          assertEquals(0.01666667,
                  getMultiplicationFactorTo(PowerUnit.FOOT_POUND_FORCE_PER_HOUR, PowerUnit.FOOT_POUND_FORCE_PER_MINUTE),
                  0.0000001, "one FOOT POUND FORCE PER HOUR is about 0.0166667 FOOT POUND FORCE PER MINUTE");
          assertEquals(60, getMultiplicationFactorTo(PowerUnit.FOOT_POUND_FORCE_PER_MINUTE, PowerUnit.FOOT_POUND_FORCE_PER_HOUR),
                  0.000001, "one FOOT POUND FORCE PER MINUTE is 60 FOOT POUND FORCE PER HOUR");
          // Check conversion factor to standard unit for all remaining time units
          checkUnitRatioNameAndAbbreviation(PowerUnit.KILOWATT, 1000, 0.001, "kilowatt", "kW");
          checkUnitRatioNameAndAbbreviation(PowerUnit.MEGAWATT, 1000000, 1, "megawatt", "MW");
          checkUnitRatioNameAndAbbreviation(PowerUnit.GIGAWATT, 1e9, 1e3, "gigawatt", "GW");
          checkUnitRatioNameAndAbbreviation(PowerUnit.FOOT_POUND_FORCE_PER_SECOND, 1.3558179, 0.000001,
                  "foot pound-force per second", "ft.lbf/s");
          checkUnitRatioNameAndAbbreviation(PowerUnit.HORSEPOWER_METRIC, 735.49875, 0.00001, "horsepower (metric)", "hp(M)");
      }
  
      /**
       * Verify that we can create our own power unit.
       */
      @Test
      public final void createPowerUnitUnit()
      {
          PowerUnit myMU = PowerUnit.WATT.deriveLinear(250, "pnp", "Person", UnitSystem.OTHER);
          assertTrue(null != myMU, "Can create a new PowerUnit");
          checkUnitRatioNameAndAbbreviation(myMU, 250, 1, "Person", "pnp");
          PowerUnit.BASE.unregister(myMU);
      }
  
  }