| /** |
| * 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.io; |
| |
| import java.io.IOException; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.fail; |
| |
| public class TestWritableUtils { |
| private static final Log LOG = LogFactory.getLog(TestWritableUtils.class); |
| |
| private void testValue(int val, int vintlen) throws IOException { |
| DataOutputBuffer buf = new DataOutputBuffer(); |
| DataInputBuffer inbuf = new DataInputBuffer(); |
| WritableUtils.writeVInt(buf, val); |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Value = " + val); |
| BytesWritable printer = new BytesWritable(); |
| printer.set(buf.getData(), 0, buf.getLength()); |
| LOG.debug("Buffer = " + printer); |
| } |
| inbuf.reset(buf.getData(), 0, buf.getLength()); |
| assertEquals(val, WritableUtils.readVInt(inbuf)); |
| assertEquals(vintlen, buf.getLength()); |
| assertEquals(vintlen, WritableUtils.getVIntSize(val)); |
| assertEquals(vintlen, WritableUtils.decodeVIntSize(buf.getData()[0])); |
| } |
| private void testReadInRange(long val, int lower, |
| int upper, boolean expectSuccess) throws IOException { |
| DataOutputBuffer buf = new DataOutputBuffer(); |
| DataInputBuffer inbuf = new DataInputBuffer(); |
| WritableUtils.writeVLong(buf, val); |
| try { |
| inbuf.reset(buf.getData(), 0, buf.getLength()); |
| long val2 = WritableUtils.readVIntInRange(inbuf, lower, upper); |
| if (!expectSuccess) { |
| fail("expected readVIntInRange to throw an exception"); |
| } |
| assertEquals(val, val2); |
| } catch(IOException e) { |
| if (expectSuccess) { |
| LOG.error("unexpected exception:", e); |
| fail("readVIntInRange threw an unexpected exception"); |
| } |
| } |
| } |
| |
| @Test |
| public void testVInt() throws Exception { |
| testValue(12, 1); |
| testValue(127, 1); |
| testValue(-112, 1); |
| testValue(-113, 2); |
| testValue(-128, 2); |
| testValue(128, 2); |
| testValue(-129, 2); |
| testValue(255, 2); |
| testValue(-256, 2); |
| testValue(256, 3); |
| testValue(-257, 3); |
| testValue(65535, 3); |
| testValue(-65536, 3); |
| testValue(65536, 4); |
| testValue(-65537, 4); |
| testReadInRange(123, 122, 123, true); |
| testReadInRange(123, 0, 100, false); |
| testReadInRange(0, 0, 100, true); |
| testReadInRange(-1, 0, 100, false); |
| testReadInRange(1099511627776L, 0, Integer.MAX_VALUE, false); |
| } |
| } |