package org.jastacry.layer;
   
   import static org.junit.Assert.assertEquals;
   
   import java.io.ByteArrayInputStream;
   import java.io.ByteArrayOutputStream;
   import java.io.InputStream;
   import java.io.OutputStream;
   
  import org.jastacry.JastacryException;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * Test class for AES Layer.
   *
   * @author Kai Kretschmann
   *
   */
  public class TestLayerAesCbc
  {
      /**
       * Test data to play with.
       */
      private final String testdata = "The quick brown fox jumps over the lazy dog.";
  
      /**
       * Layer to test.
       */
      private AesCbcLayer layerEncrypt = null;
  
      /**
       * Layer to test.
       */
      private AesCbcLayer layerDecrypt = null;
  
      /**
       * Init value for random layer.
       */
      private static final String INITVALUE = "Passwort";
  
      /**
       * Test Before method.
       *
       * @throws Exception
       *             in case of error.
       */
      @BeforeEach
      public void setUp() throws Exception
      {
          layerEncrypt = new AesCbcLayer();
          layerEncrypt.init(INITVALUE);
  
          layerDecrypt = new AesCbcLayer();
          layerDecrypt.init(INITVALUE);
      }
  
      /**
       * Test After method.
       *
       * @throws Exception
       *             in case off error
       */
      @AfterEach
      public void tearDown() throws Exception
      {
          layerEncrypt = null;
          layerDecrypt = null;
      }
  
      /**
       * Testcase testEncDecStream.
       *
       * @throws JastacryException
       *             in case off error
       */
      @Test
      public void testEncDecStream() throws JastacryException
      {
          byte[] buf = testdata.getBytes();
          final InputStream isEncode = new ByteArrayInputStream(buf);
          final ByteArrayOutputStream osEncode = new ByteArrayOutputStream();
          layerEncrypt.encStream(isEncode, osEncode);
          buf = osEncode.toByteArray();
  
          final InputStream isDecode = new ByteArrayInputStream(buf);
          final OutputStream osDecode = new ByteArrayOutputStream();
          layerDecrypt.decStream(isDecode, osDecode);
          assertEquals("decoding differs", testdata, osDecode.toString());
  
      }
  
      /**
       * Testcase testToString.
       */
      @Test
      public void testToString()
      {
         assertEquals("Layer name mismatch", AesCbcLayer.LAYERNAME, layerEncrypt.toString());
     }
 
     /**
      * Testcase equals.
      */
     @Test
     public void testEquals()
     {
         AesCbcLayer l1 = new AesCbcLayer();
         AesCbcLayer l2 = new AesCbcLayer();
         l1.init(INITVALUE);
         l2.init(INITVALUE);
         assertEquals("Layer object equal", l1, l2);
     }
 
     /**
      * Testcase equals.
      */
     @Test
     public void testEqualsSame()
     {
         AesCbcLayer l1 = new AesCbcLayer();
         l1.init(INITVALUE);
         assertEquals("Layer object same", l1, l1);
     }
 
     /**
      * Testcase equals.
      */
     @Test
     public void testNotEqualsNull()
     {
         AesCbcLayer l1 = new AesCbcLayer();
         l1.init(INITVALUE);
         Object o = null;
         assertEquals("Layer object null unequal", false, l1.equals(o));
     }
 
     /**
      * Testcase equals.
      */
     @Test
     public void testNotEqualsWrongclass()
     {
         AesCbcLayer l1 = new AesCbcLayer();
         l1.init(INITVALUE);
         Object o = new Object();
         assertEquals("Layer object wrong class unequal", false, l1.equals(o));
     }
 
     /**
      * Testcase hashcode.
      */
     @Test
     public void testHashcode()
     {
         AesCbcLayer l1 = new AesCbcLayer();
         AesCbcLayer l2 = new AesCbcLayer();
         l1.init(INITVALUE);
         l2.init(INITVALUE);
         assertEquals("Layer hash equal", l1.hashCode(), l2.hashCode());
     }
 
 }