| /* |
| * 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.io; |
| |
| import static org.junit.jupiter.api.Assertions.assertArrayEquals; |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| import static org.junit.jupiter.api.Assertions.assertFalse; |
| import static org.junit.jupiter.api.Assertions.assertThrows; |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.Arrays; |
| |
| import org.junit.jupiter.api.Test; |
| |
| /** |
| * Tests {@link RandomAccessFiles}. |
| */ |
| public class RandomAccessFilesTest { |
| |
| private static final String FILE_NAME_RO_20 = "src/test/resources/org/apache/commons/io/test-file-20byteslength.bin"; |
| private static final String FILE_NAME_RO_0 = "src/test/resources/org/apache/commons/io/test-file-empty.bin"; |
| private static final String FILE_NAME_RO_0_BIS = "src/test/resources/org/apache/commons/io/test-file-empty2.bin"; |
| |
| @Test |
| public void testContentEquals() throws IOException { |
| try (RandomAccessFile raf1 = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20)) { |
| assertEquals(raf1, raf1); |
| assertTrue(RandomAccessFiles.contentEquals(raf1, raf1)); |
| } |
| // as above, to make sure resources are OK |
| try (RandomAccessFile raf1 = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20)) { |
| assertEquals(raf1, raf1); |
| assertTrue(RandomAccessFiles.contentEquals(raf1, raf1)); |
| } |
| // same 20 bytes |
| try (RandomAccessFile raf1 = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20); |
| RandomAccessFile raf2 = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20)) { |
| assertTrue(RandomAccessFiles.contentEquals(raf1, raf2)); |
| } |
| // same empty file |
| try (RandomAccessFile raf1 = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_0); |
| RandomAccessFile raf2 = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_0)) { |
| assertTrue(RandomAccessFiles.contentEquals(raf1, raf2)); |
| assertTrue(RandomAccessFiles.contentEquals(RandomAccessFiles.reset(raf2), RandomAccessFiles.reset(raf1))); |
| } |
| // diff empty file |
| try (RandomAccessFile raf1 = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_0); |
| RandomAccessFile raf2 = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_0_BIS)) { |
| assertTrue(RandomAccessFiles.contentEquals(raf1, raf2)); |
| assertTrue(RandomAccessFiles.contentEquals(RandomAccessFiles.reset(raf2), RandomAccessFiles.reset(raf1))); |
| } |
| try (RandomAccessFile raf1 = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_0); |
| RandomAccessFile raf2 = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20)) { |
| assertFalse(RandomAccessFiles.contentEquals(raf1, raf2)); |
| assertFalse(RandomAccessFiles.contentEquals(RandomAccessFiles.reset(raf2), RandomAccessFiles.reset(raf1))); |
| } |
| // |
| final Path bigFile1 = Files.createTempFile(getClass().getSimpleName(), "-1.bin"); |
| final Path bigFile2 = Files.createTempFile(getClass().getSimpleName(), "-2.bin"); |
| final Path bigFile3 = Files.createTempFile(getClass().getSimpleName(), "-3.bin"); |
| try { |
| final int newLength = 1_000_000; |
| final byte[] bytes1 = new byte[newLength]; |
| final byte[] bytes2 = new byte[newLength]; |
| Arrays.fill(bytes1, (byte) 1); |
| Arrays.fill(bytes2, (byte) 2); |
| Files.write(bigFile1, bytes1); |
| Files.write(bigFile2, bytes2); |
| try (RandomAccessFile raf1 = RandomAccessFileMode.READ_ONLY.create(bigFile1); |
| RandomAccessFile raf2 = RandomAccessFileMode.READ_ONLY.create(bigFile2)) { |
| assertFalse(RandomAccessFiles.contentEquals(raf1, raf2)); |
| assertFalse(RandomAccessFiles.contentEquals(RandomAccessFiles.reset(raf2), RandomAccessFiles.reset(raf1))); |
| assertTrue(RandomAccessFiles.contentEquals(RandomAccessFiles.reset(raf1), RandomAccessFiles.reset(raf1))); |
| } |
| // Make the last byte different |
| final byte[] bytes3 = bytes1.clone(); |
| bytes3[bytes3.length - 1] = 9; |
| Files.write(bigFile3, bytes3); |
| try (RandomAccessFile raf1 = RandomAccessFileMode.READ_ONLY.create(bigFile1); |
| RandomAccessFile raf3 = RandomAccessFileMode.READ_ONLY.create(bigFile3)) { |
| assertFalse(RandomAccessFiles.contentEquals(raf1, raf3)); |
| assertFalse(RandomAccessFiles.contentEquals(RandomAccessFiles.reset(raf3), RandomAccessFiles.reset(raf1))); |
| } |
| } finally { |
| // Delete ASAP |
| Files.deleteIfExists(bigFile1); |
| Files.deleteIfExists(bigFile2); |
| Files.deleteIfExists(bigFile3); |
| } |
| } |
| |
| @Test |
| public void testRead() throws IOException { |
| try (final RandomAccessFile raf = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20)) { |
| final byte[] buffer = RandomAccessFiles.read(raf, 0, 0); |
| assertArrayEquals(new byte[] {}, buffer); |
| } |
| try (final RandomAccessFile raf = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20)) { |
| final byte[] buffer = RandomAccessFiles.read(raf, 1, 0); |
| assertArrayEquals(new byte[] {}, buffer); |
| } |
| try (final RandomAccessFile raf = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20)) { |
| final byte[] buffer = RandomAccessFiles.read(raf, 0, 1); |
| assertArrayEquals(new byte[] { '1' }, buffer); |
| } |
| try (final RandomAccessFile raf = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20)) { |
| final byte[] buffer = RandomAccessFiles.read(raf, 1, 1); |
| assertArrayEquals(new byte[] { '2' }, buffer); |
| } |
| try (final RandomAccessFile raf = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20)) { |
| final byte[] buffer = RandomAccessFiles.read(raf, 0, 20); |
| assertEquals(20, buffer.length); |
| } |
| try (final RandomAccessFile raf = RandomAccessFileMode.READ_ONLY.create(FILE_NAME_RO_20)) { |
| assertThrows(IOException.class, () -> RandomAccessFiles.read(raf, 0, 21)); |
| } |
| } |
| } |