package org.djutils.data;
   
   import static org.junit.Assert.assertArrayEquals;
   import static org.junit.Assert.assertEquals;
   import static org.junit.Assert.assertFalse;
   import static org.junit.Assert.assertTrue;
   
   import java.io.File;
   import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  
  import javax.xml.stream.XMLStreamException;
  
  import org.djutils.data.serialization.TextSerializationException;
  import org.djutils.data.xml.XMLData;
  import org.junit.Test;
  
  /**
   * TestXMLData tests writing and reading of a XML file, and checks that all data is read back correctly into the DataTable. <br>
   * <br>
   * Copyright (c) 2020-2022 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See
   * for project information <a href="https://djutils.org" target="_blank"> https://djutils.org</a>. The DJUTILS project is
   * distributed under a three-clause BSD-style license, which can be found at
   * <a href="https://djutils.org/docs/license.html" target="_blank"> https://djutils.org/docs/license.html</a>. <br>
   * @author <a href="https://www.tudelft.nl/averbraeck">Alexander Verbraeck</a>
   * @author <a href="https://www.tudelft.nl/pknoppers">Peter Knoppers</a>
   * @author <a href="http://www.transport.citg.tudelft.nl">Wouter Schakel</a>
   */
  public class TestXMLData
  {
      /**
       * test reading and writing of a XML file.
       * @throws IOException on error
       * @throws TextSerializationException on unknown data type for (de)serialization
       * @throws XMLStreamException on XML error
       */
      @Test
      public void testreadWriteXML() throws IOException, TextSerializationException, XMLStreamException
      {
          File tempDataFile = File.createTempFile("testdata", ".xml");
          tempDataFile.deleteOnExit();
  
          DataColumn<Integer> column1 = new SimpleDataColumn<>("time", "time, rounded to second [s]", int.class);
          DataColumn<Double> column2 = new SimpleDataColumn<>("value", "measured value [m]", double.class);
          DataColumn<String> column3 = new SimpleDataColumn<>("remark", "remark about the measurement", String.class);
          List<DataColumn<?>> columns = new ArrayList<>();
          columns.add(column1);
          columns.add(column2);
          columns.add(column3);
          ListDataTable table1 = new ListDataTable("tableId", "tableDescription", columns);
          table1.addRecord(new Object[] {1, 5.0, "normal"});
          table1.addRecord(new Object[] {2, 10.0, "normal"});
          table1.addRecord(new Object[] {3, 15.0, "normal"});
          table1.addRecord(new Object[] {4, 20.0, "abnormal"});
          XMLData.writeData(tempDataFile.getAbsolutePath(), table1);
  
          DataTable table2 = XMLData.readData(tempDataFile.getAbsolutePath());
          assertTrue(table2 instanceof ListDataTable);
          assertEquals(table1.getId(), table2.getId());
          assertEquals(table1.getDescription(), table2.getDescription());
          assertEquals(table1.getNumberOfColumns(), table2.getNumberOfColumns());
          assertArrayEquals(table1.getColumnIds(), table2.getColumnIds());
          assertArrayEquals(table1.getColumnDescriptions(), table2.getColumnDescriptions());
          assertArrayEquals(table1.getColumnDataTypes(), table2.getColumnDataTypes());
          assertArrayEquals(table1.getColumnDataTypeStrings(), table2.getColumnDataTypeStrings());
          
          Iterator<DataRecord> it1 = table1.iterator();
          Iterator<DataRecord> it2 = table2.iterator();
          while (it1.hasNext() && it2.hasNext())
          {
              DataRecord r1 = it1.next();
              DataRecord r2 = it2.next();
              assertArrayEquals(r1.getValues(), r2.getValues());
          }
          assertFalse(it1.hasNext());
          assertFalse(it2.hasNext());
      }
  }