[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package org.apache.hadoop.io; |
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| 20 | |
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| 21 | import java.io.IOException; |
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| 22 | |
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| 23 | import org.apache.commons.logging.Log; |
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| 24 | import org.apache.commons.logging.LogFactory; |
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| 25 | |
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| 26 | import junit.framework.TestCase; |
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| 27 | |
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| 28 | public class TestWritableUtils extends TestCase { |
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| 29 | private static final Log LOG = LogFactory.getLog(TestWritableUtils.class); |
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| 30 | |
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| 31 | public static void testValue(int val, int vintlen) throws IOException { |
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| 32 | DataOutputBuffer buf = new DataOutputBuffer(); |
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| 33 | DataInputBuffer inbuf = new DataInputBuffer(); |
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| 34 | WritableUtils.writeVInt(buf, val); |
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| 35 | if (LOG.isDebugEnabled()) { |
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| 36 | LOG.debug("Value = " + val); |
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| 37 | BytesWritable printer = new BytesWritable(); |
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| 38 | printer.set(buf.getData(), 0, buf.getLength()); |
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| 39 | LOG.debug("Buffer = " + printer); |
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| 40 | } |
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| 41 | inbuf.reset(buf.getData(), 0, buf.getLength()); |
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| 42 | assertEquals(val, WritableUtils.readVInt(inbuf)); |
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| 43 | assertEquals(vintlen, buf.getLength()); |
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| 44 | assertEquals(vintlen, WritableUtils.getVIntSize(val)); |
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| 45 | assertEquals(vintlen, WritableUtils.decodeVIntSize(buf.getData()[0])); |
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| 46 | } |
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| 47 | |
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| 48 | public static void testVInt() throws Exception { |
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| 49 | testValue(12, 1); |
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| 50 | testValue(127, 1); |
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| 51 | testValue(-112, 1); |
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| 52 | testValue(-113, 2); |
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| 53 | testValue(-128, 2); |
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| 54 | testValue(128, 2); |
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| 55 | testValue(-129, 2); |
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| 56 | testValue(255, 2); |
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| 57 | testValue(-256, 2); |
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| 58 | testValue(256, 3); |
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| 59 | testValue(-257, 3); |
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| 60 | testValue(65535, 3); |
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| 61 | testValue(-65536, 3); |
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| 62 | testValue(65536, 4); |
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| 63 | testValue(-65537, 4); |
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| 64 | } |
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| 65 | } |
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