/*
    * 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
    *
   *   https://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.utils;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.junit.jupiter.api.Test;
  
  class SkipShieldingInputStreamTest {
  
      @Test
      void testSkipDelegatesToRead() throws IOException {
          try (InputStream i = new SkipShieldingInputStream(new InputStream() {
              @Override
              public int read() {
                  return -1;
              }
  
              @Override
              public int read(byte[] b, int off, int len) {
                  return len;
              }
  
              @Override
              public long skip(long n) {
                  fail("skip invoked");
                  return -1;
              }
          })) {
              assertEquals(100, i.skip(100));
          }
      }
  
      @Test
      void testSkipHasAnUpperBoundOnRead() throws IOException {
          try (InputStream i = new SkipShieldingInputStream(new InputStream() {
              @Override
              public int read() {
                  return -1;
              }
  
              @Override
              public int read(byte[] b, int off, int len) {
                  return len;
              }
  
              @Override
              public long skip(long n) {
                  fail("skip invoked");
                  return -1;
              }
          })) {
              assertTrue(Integer.MAX_VALUE > i.skip(Long.MAX_VALUE));
          }
      }
  
      @Test
      void testSkipSwallowsNegativeArguments() throws IOException {
          try (InputStream i = new SkipShieldingInputStream(new InputStream() {
              @Override
              public int read() {
                  return -1;
              }
  
              @Override
              public int read(byte[] b, int off, int len) {
                  fail("read invoked");
                  return len;
              }
  
              @Override
              public long skip(long n) {
                  fail("skip invoked");
                  return -1;
              }
          })) {
              assertEquals(0, i.skip(Long.MIN_VALUE));
          }
     }
 
 }