| /* |
| * 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.codec.digest; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.URI; |
| import java.net.URL; |
| import java.util.Arrays; |
| import java.util.Collection; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.junit.runners.Parameterized; |
| import org.junit.runners.Parameterized.Parameters; |
| import org.junit.runner.RunWith; |
| |
| @RunWith(Parameterized.class) |
| public class XXHash32Test { |
| |
| private final File file; |
| private final String expectedChecksum; |
| |
| public XXHash32Test(final String path, final String c) throws IOException { |
| final URL url = XXHash32Test.class.getClassLoader().getResource(path); |
| if (url == null) { |
| throw new FileNotFoundException("couldn't find " + path); |
| } |
| URI uri = null; |
| try { |
| uri = url.toURI(); |
| } catch (final java.net.URISyntaxException ex) { |
| throw new IOException(ex); |
| } |
| file = new File(uri); |
| expectedChecksum = c; |
| } |
| |
| @Parameters |
| public static Collection<Object[]> factory() { |
| return Arrays.asList(new Object[][] { |
| // reference checksums created with xxh32sum |
| // http://cyan4973.github.io/xxHash/ |
| { "bla.tar", "fbb5c8d1" }, |
| { "bla.tar.xz", "4106a208" }, |
| { "small.bin", "f66c26f8" }, |
| }); |
| } |
| |
| @Test |
| public void verifyChecksum() throws IOException { |
| final XXHash32 h = new XXHash32(); |
| try (final FileInputStream s = new FileInputStream(file)) { |
| final byte[] b = toByteArray(s); |
| h.update(b, 0, b.length); |
| } |
| Assert.assertEquals("checksum for " + file.getName(), expectedChecksum, Long.toHexString(h.getValue())); |
| } |
| |
| @Test |
| public void verifyIncrementalChecksum() throws IOException { |
| final XXHash32 h = new XXHash32(); |
| try (final FileInputStream s = new FileInputStream(file)) { |
| final byte[] b = toByteArray(s); |
| // Hit the case where the hash should be reset |
| h.update(b[0]); |
| h.reset(); |
| // Pass in chunks |
| h.update(b[0]); |
| h.update(b, 1, b.length - 2); |
| h.update(b, b.length - 1, 1); |
| // Check the hash ignores negative length |
| h.update(b, 0, -1); |
| } |
| Assert.assertEquals("checksum for " + file.getName(), expectedChecksum, Long.toHexString(h.getValue())); |
| } |
| |
| private static byte[] toByteArray(final InputStream input) throws IOException { |
| final ByteArrayOutputStream output = new ByteArrayOutputStream(); |
| copy(input, output, 10240); |
| return output.toByteArray(); |
| } |
| |
| private static long copy(final InputStream input, final OutputStream output, final int buffersize) throws IOException { |
| final byte[] buffer = new byte[buffersize]; |
| int n = 0; |
| long count=0; |
| while (-1 != (n = input.read(buffer))) { |
| output.write(buffer, 0, n); |
| count += n; |
| } |
| return count; |
| } |
| } |