/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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.apache.commons.compress.compressors.zstandard;
  
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import org.junit.jupiter.api.Test;
  
  public class ZstdUtilsTest {
  
      @Test
      public void testMatchesSkippableFrame() {
          final byte[] data = { 0, (byte) 0x2A, (byte) 0x4D, (byte) 0x18, };
          assertFalse(ZstdUtils.matches(data, 4));
          for (byte b = (byte) 0x50; b < 0x60; b++) {
              data[0] = b;
              assertTrue(ZstdUtils.matches(data, 4));
          }
          assertFalse(ZstdUtils.matches(data, 3));
          assertTrue(ZstdUtils.matches(data, 5));
      }
  
      @Test
      public void testMatchesZstandardFrame() {
          final byte[] data = { (byte) 0x28, (byte) 0xB5, (byte) 0x2F, (byte) 0xFD, };
          assertFalse(ZstdUtils.matches(data, 3));
          assertTrue(ZstdUtils.matches(data, 4));
          assertTrue(ZstdUtils.matches(data, 5));
          data[3] = '0';
          assertFalse(ZstdUtils.matches(data, 4));
      }
  }