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 PressureUnitTest extends AbstractLinearUnitTest<PressureUnit>
  {
      /**
       * 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("kg/ms2", PressureUnit.SI.getQuantity().getSiDimensions().toString(true, false));
          checkUnitRatioNameAndAbbreviation(PressureUnit.PASCAL, 1, 0.00000001, "pascal", "Pa");
          checkUnitRatioNameAndAbbreviation(PressureUnit.ATMOSPHERE_STANDARD, 101325, 0.5, "atmosphere (standard)", "atm");
          checkUnitRatioNameAndAbbreviation(PressureUnit.ATMOSPHERE_TECHNICAL, 98066.5, 0.1, "atmosphere (technical)", "at");
          // Check two conversions between non-standard units
          assertEquals("one ATMOSPHERE STANDARD is about 1.03327 ATMOSPHERE TECHNICAL", 1 / 0.9678,
                  getMultiplicationFactorTo(PressureUnit.ATMOSPHERE_STANDARD, PressureUnit.ATMOSPHERE_TECHNICAL), 0.0001);
          assertEquals("one ATMOSPHERE TECHNICAL is 0.9678 ATMOSPHERE STANDARD", 0.9678,
                  getMultiplicationFactorTo(PressureUnit.ATMOSPHERE_TECHNICAL, PressureUnit.ATMOSPHERE_STANDARD), 0.0001);
          // Check conversion factor to standard unit for all remaining time units
          checkUnitRatioNameAndAbbreviation(PressureUnit.HECTOPASCAL, 100, 0.0001, "hectopascal", "hPa");
          checkUnitRatioNameAndAbbreviation(PressureUnit.KILOPASCAL, 1000, 0.001, "kilopascal", "kPa");
          checkUnitRatioNameAndAbbreviation(PressureUnit.BAR, 100000, 0.01, "bar", "bar");
          checkUnitRatioNameAndAbbreviation(PressureUnit.MILLIBAR, 100, 0.000001, "millibar", "mbar");
          checkUnitRatioNameAndAbbreviation(PressureUnit.CENTIMETER_MERCURY, 1333.22368, 0.001, "centimeter mercury", "cmHg");
          checkUnitRatioNameAndAbbreviation(PressureUnit.MILLIMETER_MERCURY, 133.322368, 0.001, "millimeter mercury", "mmHg");
          checkUnitRatioNameAndAbbreviation(PressureUnit.FOOT_MERCURY, 40636.66, 0.01, "foot mercury", "ftHg");
          checkUnitRatioNameAndAbbreviation(PressureUnit.INCH_MERCURY, 3386, 0.5, "inch mercury", "inHg");
          checkUnitRatioNameAndAbbreviation(PressureUnit.KGF_PER_SQUARE_MM, 9806650, 0.5, "kilogram-force per square millimeter",
                  "kgf/mm^2");
          checkUnitRatioNameAndAbbreviation(PressureUnit.POUND_PER_SQUARE_FOOT, 47.880259, 0.000001,
                  "pound-force per square foot", "lbf/ft^2");
          checkUnitRatioNameAndAbbreviation(PressureUnit.POUND_PER_SQUARE_INCH, 6894.75729, 0.00001,
                  "pound-force per square inch", "lbf/in^2");
      }
  
      /**
       * Verify that we can create our own pressure unit.
       */
      @Test
      public final void createPressureUnit()
      {
          PressureUnit myPU = PressureUnit.MILLIMETER_MERCURY.deriveLinear(106, "hhhp", "HealthyHumanHeart", UnitSystem.OTHER);
          assertTrue("Can create a new PowerUnit", null != myPU);
          checkUnitRatioNameAndAbbreviation(myPU, 14132.1711, 0.01, "HealthyHumanHeart", "hhhp");
          PressureUnit.BASE.unregister(myPU);
      }
  
  }