code: /*
   * Copyright (c) 2019 the Eclipse Milo Authors
   *
   * This program and the accompanying materials are made
   * available under the terms of the Eclipse Public License 2.0
   * which is available at https://www.eclipse.org/legal/epl-2.0/
   *
   * SPDX-License-Identifier: EPL-2.0
   */
  
  package org.eclipse.milo.opcua.sdk.server.events.conversions;
  
  import java.nio.ByteBuffer;
  import java.util.UUID;
  
  import org.eclipse.milo.opcua.stack.core.types.builtin.ByteString;
  import org.testng.annotations.Test;
  
  import static org.testng.Assert.assertEquals;
  
  public class GuidConversionsTest {
  
      @Test
      public void testGuidToByteString() {
          long msb = 0xABCDABCDABCDABCDL;
          long lsb = 0xEFEFEFEFEFEFEFEFL;
          UUID uuid = new UUID(msb, lsb);
  
          ByteString bs = GuidConversions.guidToByteString(uuid);
  
          ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
          bb.putLong(msb).putLong(lsb);
  
          assertEquals(bs, ByteString.of(bb.array()));
      }
  
      @Test
      public void testGuidToString() {
          UUID uuid = UUID.randomUUID();
  
          assertEquals(uuid.toString(), GuidConversions.guidToString(uuid));
      }
  
  }
  