RandomAccessReadBufferedFileTest.java
/*
* Copyright 2020 The Apache Software Foundation.
*
* 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
*
* 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.pdfbox.io;
import java.io.EOFException;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Paths;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
/**
* Unittest for {@link org.apache.pdfbox.io.RandomAccessReadBufferedFile}
*/
class RandomAccessReadBufferedFileTest
{
@Test
void testPositionSkip() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
assertEquals(0, randomAccessSource.getPosition());
randomAccessSource.skip(5);
assertEquals('5', randomAccessSource.read());
assertEquals(6, randomAccessSource.getPosition());
}
}
@Test
void testPositionRead() throws IOException, URISyntaxException
{
RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI()));
assertEquals(0, randomAccessSource.getPosition());
assertEquals('0', randomAccessSource.read());
assertEquals('1', randomAccessSource.read());
assertEquals('2', randomAccessSource.read());
assertEquals(3, randomAccessSource.getPosition());
assertFalse(randomAccessSource.isClosed());
randomAccessSource.close();
assertTrue(randomAccessSource.isClosed());
}
@Test
void testSeekEOF() throws IOException, URISyntaxException
{
RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI()));
randomAccessSource.seek(3);
assertEquals(3, randomAccessSource.getPosition());
Assertions.assertThrows(IOException.class, () -> randomAccessSource.seek(-1),
"seek should have thrown an IOException");
assertFalse(randomAccessSource.isEOF());
randomAccessSource.seek(randomAccessSource.length());
assertTrue(randomAccessSource.isEOF());
assertEquals(-1, randomAccessSource.read());
assertEquals(-1, randomAccessSource.read(new byte[1], 0, 1));
randomAccessSource.close();
Assertions.assertThrows(IOException.class, randomAccessSource::read,
"checkClosed should have thrown an IOException");
}
@Test
void testPositionReadBytes() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
assertEquals(0, randomAccessSource.getPosition());
byte[] buffer = new byte[4];
randomAccessSource.read(buffer);
assertEquals('0', buffer[0]);
assertEquals('3', buffer[3]);
assertEquals(4, randomAccessSource.getPosition());
randomAccessSource.read(buffer, 1, 2);
assertEquals('0', buffer[0]);
assertEquals('4', buffer[1]);
assertEquals('5', buffer[2]);
assertEquals('3', buffer[3]);
assertEquals(6, randomAccessSource.getPosition());
}
}
@Test
void testPositionPeek() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
assertEquals(0, randomAccessSource.getPosition());
randomAccessSource.skip(6);
assertEquals(6, randomAccessSource.getPosition());
assertEquals('6', randomAccessSource.peek());
assertEquals(6, randomAccessSource.getPosition());
}
}
@Test
void testPathConstructor() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
Paths.get(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
assertEquals(130, randomAccessSource.length());
}
}
@Test
void testPositionUnreadBytes() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
assertEquals(0, randomAccessSource.getPosition());
randomAccessSource.read();
randomAccessSource.read();
byte[] readBytes = new byte[6];
assertEquals(readBytes.length, randomAccessSource.read(readBytes));
assertEquals(8, randomAccessSource.getPosition());
randomAccessSource.rewind(readBytes.length);
assertEquals(2, randomAccessSource.getPosition());
assertEquals('2', randomAccessSource.read());
assertEquals(3, randomAccessSource.getPosition());
randomAccessSource.read(readBytes, 2, 4);
assertEquals(7, randomAccessSource.getPosition());
randomAccessSource.rewind(4);
assertEquals(3, randomAccessSource.getPosition());
}
}
@Test
void testEmptyBuffer() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadEmptyFile.txt").toURI())))
{
assertEquals(-1, randomAccessSource.read());
assertEquals(-1, randomAccessSource.peek());
byte[] readBytes = new byte[6];
assertEquals(-1, randomAccessSource.read(readBytes));
randomAccessSource.seek(0);
assertEquals(0, randomAccessSource.getPosition());
randomAccessSource.seek(6);
assertEquals(0, randomAccessSource.getPosition());
assertTrue(randomAccessSource.isEOF());
Assertions.assertThrows(IOException.class, () -> randomAccessSource.rewind(3),
"seek should have thrown an IOException");
}
}
@Test
void testView() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI()));
RandomAccessReadView view = randomAccessSource.createView(3, 10))
{
assertEquals(0, view.getPosition());
assertEquals('3', view.read());
assertEquals('4', view.read());
assertEquals('5', view.read());
assertEquals(3, view.getPosition());
}
}
@Test
void testReadFully1() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
byte[] b = new byte[10];
randomAccessSource.seek(1);
randomAccessSource.readFully(b);
String s = new String(b, StandardCharsets.US_ASCII);
assertEquals("1234567890", s);
}
}
@Test
void testReadFully2() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
byte[] b = new byte[10];
randomAccessSource.readFully(b, 2, 8);
String s = new String(b, 2, 8, StandardCharsets.US_ASCII);
assertEquals("01234567", s);
assertEquals(0, b[0]);
assertEquals(0, b[1]);
}
}
@Test
void testReadFully3() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
byte[] b = new byte[10];
randomAccessSource.seek(randomAccessSource.length() - b.length);
randomAccessSource.readFully(b);
String s = new String(b, StandardCharsets.US_ASCII);
assertEquals("0123456789", s);
}
}
@Test
void testReadFullyEOF() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
byte[] b = new byte[10];
randomAccessSource.seek(randomAccessSource.length() - b.length + 1);
Assertions.assertThrows(EOFException.class, () -> randomAccessSource.readFully(b));
}
}
@Test
void testReadFullyExact() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
int length = (int) randomAccessSource.length();
byte[] b = new byte[length];
randomAccessSource.readFully(b);
byte[] allBytes = getClass().getResourceAsStream("RandomAccessReadFile1.txt").readAllBytes();
Assertions.assertArrayEquals(allBytes, b);
}
}
@Test
void testReadFullyAcrossBuffers() throws IOException
{
int bufferLen;
File file = new File("src/test/java/org/apache/pdfbox/io/NonSeekableRandomAccessReadInputStreamTest.java");
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(file))
{
int length = (int) randomAccessSource.length();
byte[] b = new byte[length];
bufferLen = randomAccessSource.read(b);
// make sure that the double buffer size is smaller than the length
// if this test fails, we'll need a larger file
assertTrue(bufferLen * 2 < length);
}
byte[] expectedBytes;
try (InputStream is = new FileInputStream(file))
{
long skipped = is.skip(bufferLen / 2);
assertEquals(skipped, bufferLen / 2);
expectedBytes = new byte[bufferLen * 2];
int actualRead = is.read(expectedBytes, 1, expectedBytes.length - 1);
assertEquals(expectedBytes.length - 1, actualRead);
}
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(file))
{
randomAccessSource.seek(bufferLen / 2);
byte[] b = new byte[bufferLen * 2];
randomAccessSource.readFully(b, 1, b.length - 1);
Assertions.assertArrayEquals(expectedBytes, b);
}
}
@Test
void testReadFullyNothing() throws IOException, URISyntaxException
{
try (RandomAccessRead randomAccessSource = new RandomAccessReadBufferedFile(
new File(getClass().getResource("RandomAccessReadFile1.txt").toURI())))
{
assertEquals(0, randomAccessSource.getPosition());
byte[] b = new byte[0];
randomAccessSource.readFully(b);
assertEquals(0, randomAccessSource.getPosition());
}
}
}