content: /**
   * Copyright 2013 Bruno Oliveira, and individual contributors
   * <p>
   * 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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 org.abstractj.kalium.crypto;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  public class UtilTest {
      @Test
      public void testPrependZeros() throws Exception {
          byte[] src = {'t', 'e', 's', 't'};
          byte[] result = Util.prependZeros(3, src);
          Assert.assertArrayEquals(new byte[]{0, 0, 0, 't', 'e', 's', 't'}, result);
      }
  
      @Test(expected = RuntimeException.class)
      public void testDataNull() {
          Util.checkLength(null, 3);
      }
  }
  