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 | package org.apache.hadoop.mapred; |
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19 | |
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20 | import org.apache.hadoop.fs.ChecksumException; |
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21 | import org.apache.hadoop.io.DataInputBuffer; |
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22 | import org.apache.hadoop.io.DataOutputBuffer; |
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23 | |
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24 | import junit.framework.TestCase; |
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25 | |
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26 | public class TestIFileStreams extends TestCase { |
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27 | |
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28 | public void testIFileStream() throws Exception { |
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29 | final int DLEN = 100; |
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30 | DataOutputBuffer dob = new DataOutputBuffer(DLEN + 4); |
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31 | IFileOutputStream ifos = new IFileOutputStream(dob); |
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32 | for (int i = 0; i < DLEN; ++i) { |
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33 | ifos.write(i); |
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34 | } |
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35 | ifos.close(); |
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36 | DataInputBuffer dib = new DataInputBuffer(); |
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37 | dib.reset(dob.getData(), DLEN + 4); |
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38 | IFileInputStream ifis = new IFileInputStream(dib, 104); |
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39 | for (int i = 0; i < DLEN; ++i) { |
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40 | assertEquals(i, ifis.read()); |
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41 | } |
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42 | ifis.close(); |
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43 | } |
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44 | |
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45 | public void testBadIFileStream() throws Exception { |
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46 | final int DLEN = 100; |
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47 | DataOutputBuffer dob = new DataOutputBuffer(DLEN + 4); |
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48 | IFileOutputStream ifos = new IFileOutputStream(dob); |
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49 | for (int i = 0; i < DLEN; ++i) { |
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50 | ifos.write(i); |
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51 | } |
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52 | ifos.close(); |
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53 | DataInputBuffer dib = new DataInputBuffer(); |
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54 | final byte[] b = dob.getData(); |
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55 | ++b[17]; |
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56 | dib.reset(b, DLEN + 4); |
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57 | IFileInputStream ifis = new IFileInputStream(dib, 104); |
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58 | int i = 0; |
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59 | try { |
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60 | while (i < DLEN) { |
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61 | if (17 == i) { |
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62 | assertEquals(18, ifis.read()); |
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63 | } else { |
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64 | assertEquals(i, ifis.read()); |
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65 | } |
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66 | ++i; |
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67 | } |
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68 | ifis.close(); |
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69 | } catch (ChecksumException e) { |
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70 | assertEquals("Unexpected bad checksum", DLEN - 1, i); |
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71 | return; |
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72 | } |
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73 | fail("Did not detect bad data in checksum"); |
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74 | } |
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75 | |
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76 | public void testBadLength() throws Exception { |
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77 | final int DLEN = 100; |
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78 | DataOutputBuffer dob = new DataOutputBuffer(DLEN + 4); |
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79 | IFileOutputStream ifos = new IFileOutputStream(dob); |
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80 | for (int i = 0; i < DLEN; ++i) { |
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81 | ifos.write(i); |
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82 | } |
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83 | ifos.close(); |
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84 | DataInputBuffer dib = new DataInputBuffer(); |
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85 | dib.reset(dob.getData(), DLEN + 4); |
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86 | IFileInputStream ifis = new IFileInputStream(dib, 100); |
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87 | int i = 0; |
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88 | try { |
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89 | while (i < DLEN - 8) { |
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90 | assertEquals(i++, ifis.read()); |
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91 | } |
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92 | ifis.close(); |
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93 | } catch (ChecksumException e) { |
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94 | assertEquals("Checksum before close", i, DLEN - 8); |
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95 | return; |
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96 | } |
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97 | fail("Did not detect bad data in checksum"); |
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98 | } |
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99 | |
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100 | } |
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