| /** |
| * 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.hadoop.mapred; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.ChecksumException; |
| import org.apache.hadoop.io.DataInputBuffer; |
| import org.apache.hadoop.io.DataOutputBuffer; |
| import org.junit.Test; |
| import static org.junit.Assert.fail; |
| import static org.junit.Assert.assertEquals; |
| |
| public class TestIFileStreams { |
| @Test |
| public void testIFileStream() throws Exception { |
| final int DLEN = 100; |
| DataOutputBuffer dob = new DataOutputBuffer(DLEN + 4); |
| IFileOutputStream ifos = new IFileOutputStream(dob); |
| for (int i = 0; i < DLEN; ++i) { |
| ifos.write(i); |
| } |
| ifos.close(); |
| DataInputBuffer dib = new DataInputBuffer(); |
| dib.reset(dob.getData(), DLEN + 4); |
| IFileInputStream ifis = new IFileInputStream(dib, 104, new Configuration()); |
| for (int i = 0; i < DLEN; ++i) { |
| assertEquals(i, ifis.read()); |
| } |
| ifis.close(); |
| } |
| @Test |
| public void testBadIFileStream() throws Exception { |
| final int DLEN = 100; |
| DataOutputBuffer dob = new DataOutputBuffer(DLEN + 4); |
| IFileOutputStream ifos = new IFileOutputStream(dob); |
| for (int i = 0; i < DLEN; ++i) { |
| ifos.write(i); |
| } |
| ifos.close(); |
| DataInputBuffer dib = new DataInputBuffer(); |
| final byte[] b = dob.getData(); |
| ++b[17]; |
| dib.reset(b, DLEN + 4); |
| IFileInputStream ifis = new IFileInputStream(dib, 104, new Configuration()); |
| int i = 0; |
| try { |
| while (i < DLEN) { |
| if (17 == i) { |
| assertEquals(18, ifis.read()); |
| } else { |
| assertEquals(i, ifis.read()); |
| } |
| ++i; |
| } |
| ifis.close(); |
| } catch (ChecksumException e) { |
| assertEquals("Unexpected bad checksum", DLEN - 1, i); |
| return; |
| } |
| fail("Did not detect bad data in checksum"); |
| } |
| @Test |
| public void testBadLength() throws Exception { |
| final int DLEN = 100; |
| DataOutputBuffer dob = new DataOutputBuffer(DLEN + 4); |
| IFileOutputStream ifos = new IFileOutputStream(dob); |
| for (int i = 0; i < DLEN; ++i) { |
| ifos.write(i); |
| } |
| ifos.close(); |
| DataInputBuffer dib = new DataInputBuffer(); |
| dib.reset(dob.getData(), DLEN + 4); |
| IFileInputStream ifis = new IFileInputStream(dib, 100, new Configuration()); |
| int i = 0; |
| try { |
| while (i < DLEN - 8) { |
| assertEquals(i++, ifis.read()); |
| } |
| ifis.close(); |
| } catch (ChecksumException e) { |
| assertEquals("Checksum before close", i, DLEN - 8); |
| return; |
| } |
| fail("Did not detect bad data in checksum"); |
| } |
| |
| } |