content: /*
   * 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.avro.file;
  
  import org.junit.Assert;
  import org.junit.jupiter.api.Test;
  
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class TestSeekableInputStream {
    @Test
    void readingData() throws IOException {
      byte[] data = "0123456789ABCD".getBytes(StandardCharsets.UTF_8);
      try (DataFileReader.SeekableInputStream sin = new DataFileReader.SeekableInputStream(
          new SeekableByteArrayInput(data))) {
        byte[] first8 = new byte[8];
        assertEquals(first8.length, sin.read(first8, 0, 8));
        assertArrayEquals("01234567".getBytes(StandardCharsets.UTF_8), first8);
        sin.seek(4);
        assertEquals(10, sin.available());
        assertEquals(2, sin.skip(2));
        assertEquals((byte) '6', sin.read());
        byte[] next4 = new byte[4];
        assertEquals(next4.length, sin.read(next4));
        assertArrayEquals("789A".getBytes(StandardCharsets.UTF_8), next4);
        assertEquals(11, sin.tell());
        assertEquals(data.length, sin.length());
      }
    }
  
    @Test
    void illegalSeek() throws IOException {
      try (SeekableInput in = new SeekableByteArrayInput("".getBytes(StandardCharsets.UTF_8));
          DataFileReader.SeekableInputStream sin = new DataFileReader.SeekableInputStream(in)) {
        Assert.assertThrows(IOException.class, () -> sin.seek(-5));
      }
    }
  }
  