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 * with the License.
 *
 * You can obtain a copy of the license at
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 * or https://OpenDS.dev.java.net/OpenDS.LICENSE.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
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 * trunk/opends/resource/legal-notices/OpenDS.LICENSE.  If applicable,
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 *      Portions Copyright 2006 Sun Microsystems, Inc.
 */
package org.opends.server.protocols.asn1;

import static org.testng.AssertJUnit.assertEquals;
import static org.testng.AssertJUnit.assertTrue;

import java.util.ArrayList;
import java.util.Arrays;

import org.testng.annotations.Configuration;
import org.testng.annotations.Test;

/**
 * This class defines a set of tests for the
 * org.opends.server.protocols.asn1.ASN1Long class.
 */
public class TestASN1Long extends ASN1TestCase {
  // The set of encoded values for the test longs.
  private ArrayList<byte[]> testEncodedLongs;

  // The set of long values to use in test cases.
  private ArrayList<Long> testLongs;

  /**
   * Performs any necessary initialization for this test case.
   */
  @Configuration(beforeTestClass = true)
  public void setUp() {
    testLongs = new ArrayList<Long>();
    testEncodedLongs = new ArrayList<byte[]>();

    // Add all values that can be encoded using a single byte.
    for (int i = 0; i < 128; i++) {
      testLongs.add(new Long(i));
      testEncodedLongs.add(new byte[] { (byte) (i & 0xFF) });
    }

    testLongs.add(new Long(0x80)); // The smallest 2-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0x80 });

    testLongs.add(new Long(0xFF)); // A boundary case for 2-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0xFF });

    testLongs.add(new Long(0x0100)); // A boundary case for 2-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x01, (byte) 0x00 });

    testLongs.add(new Long(0x7FFF)); // The largest 2-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x7F, (byte) 0xFF });

    testLongs.add(new Long(0x8000)); // The smallest 3-byte encoding.
    testEncodedLongs
        .add(new byte[] { (byte) 0x00, (byte) 0x80, (byte) 0x00 });

    testLongs.add(new Long(0xFFFF)); // A boundary case for 3-byte
    // encoding.
    testEncodedLongs
        .add(new byte[] { (byte) 0x00, (byte) 0xFF, (byte) 0xFF });

    testLongs.add(new Long(0x010000)); // A boundary case for 3-byte
    // encoding.
    testEncodedLongs
        .add(new byte[] { (byte) 0x01, (byte) 0x00, (byte) 0x00 });

    testLongs.add(new Long(0x7FFFFF)); // The largest 3-byte encoding.
    testEncodedLongs
        .add(new byte[] { (byte) 0x7F, (byte) 0xFF, (byte) 0xFF });

    testLongs.add(new Long(0x800000)); // The smallest 4-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0x80,
        (byte) 0x00, (byte) 0x00 });

    testLongs.add(new Long(0xFFFFFF)); // A boundary case for 4-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF });

    testLongs.add(new Long(0x01000000)); // A boundary case for 4-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x01, (byte) 0x00,
        (byte) 0x00, (byte) 0x00 });

    testLongs.add(new Long(0x7FFFFFFF)); // The largest 4-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x7F, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF });

    testLongs.add(0x80000000L); // The smallest 5-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0x80,
        (byte) 0x00, (byte) 0x00, (byte) 0x00 });

    testLongs.add(0xFFFFFFFFL); // A boundary case for 5-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF, (byte) 0xFF });

    testLongs.add(0x0100000000L); // A boundary case for 5-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x01, (byte) 0x00,
        (byte) 0x00, (byte) 0x00, (byte) 0x00 });

    testLongs.add(0x07FFFFFFFFL); // The largest 5-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x07, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF, (byte) 0xFF });

    testLongs.add(0x8000000000L); // The smallest 6-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0x80,
        (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 });

    testLongs.add(0xFFFFFFFFFFL); // A boundary case for 6-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF });

    testLongs.add(0x010000000000L); // A boundary case for 6-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x01, (byte) 0x00,
        (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 });

    testLongs.add(0x07FFFFFFFFFFL); // The largest 6-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x07, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF });

    testLongs.add(0x800000000000L); // The smallest 7-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0x80,
        (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 });

    testLongs.add(0xFFFFFFFFFFFFL); // A boundary case for 7-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF });

    testLongs.add(0x01000000000000L); // A boundary case for 7-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x01, (byte) 0x00,
        (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 });

    testLongs.add(0x07FFFFFFFFFFFFL); // The largest 7-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x07, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF });

    testLongs.add(0x80000000000000L); // The smallest 8-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0x80,
        (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
        (byte) 0x00 });

    testLongs.add(0xFFFFFFFFFFFFFFL); // A boundary case for 8-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x00, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
        (byte) 0xFF });

    testLongs.add(0x0100000000000000L); // A boundary case for 8-byte
    // encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x01, (byte) 0x00,
        (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
        (byte) 0x00 });

    testLongs.add(0x07FFFFFFFFFFFFFFL); // The largest 8-byte encoding.
    testEncodedLongs.add(new byte[] { (byte) 0x07, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
        (byte) 0xFF });
  }

  /**
   * Tests the <CODE>longValue</CODE> method.
   */
  @Test()
  public void testLongValue() {
    for (long l : testLongs) {
      ASN1Long element = new ASN1Long(l);

      assertEquals(l, element.longValue());
    }
  }

  /**
   * Tests the <CODE>setValue</CODE> method that takes a long
   * argument.
   */
  @Test()
  public void testSetLongValue() {
    ASN1Long element = new ASN1Long(0);

    int numLongs = testLongs.size();
    for (int i = 0; i < numLongs; i++) {
      long longValue = testLongs.get(i);
      byte[] encodedLongValue = testEncodedLongs.get(i);

      element.setValue(longValue);
      assertEquals(longValue, element.longValue());

      assertTrue(Arrays.equals(encodedLongValue, element.value()));
    }
  }

  /**
   * Tests the <CODE>setValue</CODE> method that takes a byte array
   * argument.
   *
   * @throws Exception
   *           If the test failed unexpectedly.
   */
  @Test()
  public void testSetByteValue() throws Exception {
    ASN1Long element = new ASN1Long(0);

    int numLongs = testLongs.size();
    for (int i = 0; i < numLongs; i++) {
      long longValue = testLongs.get(i);
      byte[] encodedLongValue = testEncodedLongs.get(i);

      element.setValue(encodedLongValue);

      assertEquals(longValue, element.longValue());
    }
  }

  /**
   * Tests the <CODE>decodeAsLong</CODE> method that takes an ASN.1
   * element argument.
   *
   * @throws Exception
   *           If the test failed unexpectedly.
   */
  @Test()
  public void testDecodeElementAsLong() throws Exception {
    int numLongs = testLongs.size();
    for (int i = 0; i < numLongs; i++) {
      long longValue = testLongs.get(i);
      byte[] encodedLongValue = testEncodedLongs.get(i);

      ASN1Element element = new ASN1Element((byte) 0x00, encodedLongValue);

      assertEquals(longValue, ASN1Long.decodeAsLong(element).longValue());

      element = new ASN1Element((byte) 0x02, encodedLongValue);

      assertEquals(longValue, ASN1Long.decodeAsLong(element).longValue());
    }
  }

  /**
   * Tests the <CODE>decodeAsLong</CODE> method that takes a byte
   * array argument.
   *
   * @throws Exception
   *           If the test failed unexpectedly.
   */
  @Test()
  public void testDecodeBytesAsLong() throws Exception {
    int numLongs = testLongs.size();
    for (int i = 0; i < numLongs; i++) {
      long longValue = testLongs.get(i);
      byte[] encodedLongValue = testEncodedLongs.get(i);
      byte[] encodedLength = ASN1Element
          .encodeLength(encodedLongValue.length);
      byte[] encodedElement = new byte[1 + encodedLength.length
          + encodedLongValue.length];

      encodedElement[0] = (byte) 0x00;
      System.arraycopy(encodedLength, 0, encodedElement, 1,
          encodedLength.length);
      System.arraycopy(encodedLongValue, 0, encodedElement,
          1 + encodedLength.length, encodedLongValue.length);

      assertEquals(longValue, ASN1Long.decodeAsLong(encodedElement)
          .longValue());

      encodedElement[0] = (byte) 0x02;
      assertEquals(longValue, ASN1Long.decodeAsLong(encodedElement)
          .longValue());
    }
  }
}