code: /*******************************************************************************
   * Copyright 2018 572682
   * 
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not
   * use this file except in compliance with the License.  You may obtain a copy
   * of the License at
   * 
   *   http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations under
   * the License.
   ******************************************************************************/
  package us.dot.its.jpo.ode.plugin.j2735.builders;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  import java.lang.reflect.Constructor;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Modifier;
  import java.math.BigDecimal;
  
  import org.junit.Test;
  
  import com.fasterxml.jackson.databind.JsonNode;
  
  import us.dot.its.jpo.ode.plugin.j2735.J2735TrailerHistoryPoint;
  import us.dot.its.jpo.ode.util.XmlUtils;
  import us.dot.its.jpo.ode.util.XmlUtils.XmlUtilsException;
  
  /**
   * -- Summary -- JUnit test class for TrailerHistoryPointBuilder
   * 
   * Verifies correct conversion from JsonNode to
   * compliant-J2735TrailerHistoryPoint
   * 
   * This is a trivial test that verifies a mock J2735TrailerHistoryPoint object
   * with known contents can be successfully created. All elements of this class
   * are checked by other tests.
   * 
   * -- Documentation -- Data Frame: DF_TrailerHistoryPoint Use: The
   * DF_TrailerHistoryPoint data frame contains a single position point for a
   * trailer, expressed relative to the vehicle’s BSM positional estimate at the
   * same point in time. ASN.1 Representation: TrailerHistoryPoint ::= SEQUENCE {
   * pivotAngle Angle, -- angle with respect to the lead unit timeOffset
   * TimeOffset, -- offset backwards in time -- Position relative to the hauling
   * Vehicle positionOffset Node-XY-24b, elevationOffset VertOffset-B07 OPTIONAL,
   * heading CoarseHeading OPTIONAL, -- overall heading ... }
   */
  public class TrailerHistoryPointBuilderTest {
  
     @Test
     public void shouldCreateMockTrailerHistoryPoint() {
  
        int pivotAngle = 0;
        int timeOffset = 1;
        int xint = 0;
        int yint = 0;
        String positionOffset = "<positionOffset><x>" + xint + "</x><y>" + yint + "</y></positionOffset>";
        int elevationOffset = 0;
        int heading = 0;
  
        JsonNode testthp = null;
        try {
           testthp = (JsonNode) XmlUtils.fromXmlS("<thp><pivotAngle>" + pivotAngle + "</pivotAngle><timeOffset>"
                 + timeOffset + "</timeOffset>" + positionOffset + "<elevationOffset>" + elevationOffset
                 + "</elevationOffset><heading>" + heading + "</heading></thp>", JsonNode.class);
        } catch (XmlUtilsException e) {
           fail("XML parsing error:" + e);
        }
  
        try {
           J2735TrailerHistoryPoint actualthp = TrailerHistoryPointBuilder.genericTrailerHistoryPoint(testthp);
           assertEquals("Incorrect angle", BigDecimal.ZERO.setScale(4), actualthp.getPivotAngle());
  
           assertEquals("Incorrect position offset x", BigDecimal.ZERO.setScale(2), actualthp.getPositionOffset().getX());
           assertEquals("Incorrect position offset y", BigDecimal.ZERO.setScale(2), actualthp.getPositionOffset().getY());
           assertEquals("Incorrect elevation offset", BigDecimal.ZERO.setScale(1), actualthp.getElevationOffset());
           assertEquals("Incorrect heading", BigDecimal.ZERO.setScale(4), actualthp.getHeading());
           assertEquals("Incorrect time offset", BigDecimal.valueOf(0.01), actualthp.getTimeOffset());
        } catch (Exception e) {
           fail("Unexpected exception: " + e.getClass());
        }
     }
  
     @Test
     public void testConstructorIsPrivate()
           throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
        Constructor<TrailerHistoryPointBuilder> constructor = TrailerHistoryPointBuilder.class.getDeclaredConstructor();
        assertTrue(Modifier.isPrivate(constructor.getModifiers()));
        constructor.setAccessible(true);
        try {
           constructor.newInstance();
           fail("Expected IllegalAccessException.class");
        } catch (Exception e) {
           assertEquals(InvocationTargetException.class, e.getClass());
        }
     }
  
  }
  