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.*; |
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22 | import java.util.Random; |
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23 | |
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24 | import org.apache.hadoop.conf.Configurable; |
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25 | import org.apache.hadoop.conf.Configuration; |
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26 | import org.apache.hadoop.util.ReflectionUtils; |
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27 | |
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28 | import junit.framework.TestCase; |
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29 | |
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30 | /** Unit tests for WritableName. */ |
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31 | public class TestWritableName extends TestCase { |
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32 | public TestWritableName(String name) { |
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33 | super(name); |
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34 | } |
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35 | |
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36 | /** Example class used in test cases below. */ |
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37 | public static class SimpleWritable implements Writable { |
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38 | private static final Random RANDOM = new Random(); |
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39 | |
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40 | int state = RANDOM.nextInt(); |
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41 | |
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42 | public void write(DataOutput out) throws IOException { |
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43 | out.writeInt(state); |
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44 | } |
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45 | |
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46 | public void readFields(DataInput in) throws IOException { |
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47 | this.state = in.readInt(); |
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48 | } |
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49 | |
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50 | public static SimpleWritable read(DataInput in) throws IOException { |
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51 | SimpleWritable result = new SimpleWritable(); |
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52 | result.readFields(in); |
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53 | return result; |
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54 | } |
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55 | |
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56 | /** Required by test code, below. */ |
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57 | public boolean equals(Object o) { |
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58 | if (!(o instanceof SimpleWritable)) |
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59 | return false; |
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60 | SimpleWritable other = (SimpleWritable)o; |
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61 | return this.state == other.state; |
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62 | } |
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63 | } |
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64 | |
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65 | private static final String testName = "mystring"; |
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66 | |
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67 | public void testGoodName() throws Exception { |
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68 | Configuration conf = new Configuration(); |
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69 | Class<?> test = WritableName.getClass("long",conf); |
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70 | assertTrue(test != null); |
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71 | } |
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72 | |
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73 | public void testSetName() throws Exception { |
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74 | Configuration conf = new Configuration(); |
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75 | WritableName.setName(SimpleWritable.class, testName); |
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76 | |
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77 | Class<?> test = WritableName.getClass(testName,conf); |
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78 | assertTrue(test.equals(SimpleWritable.class)); |
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79 | } |
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80 | |
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81 | |
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82 | public void testAddName() throws Exception { |
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83 | Configuration conf = new Configuration(); |
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84 | String altName = testName + ".alt"; |
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85 | |
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86 | WritableName.addName(SimpleWritable.class, altName); |
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87 | |
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88 | Class<?> test = WritableName.getClass(altName, conf); |
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89 | assertTrue(test.equals(SimpleWritable.class)); |
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90 | |
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91 | // check original name still works |
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92 | test = WritableName.getClass(testName, conf); |
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93 | assertTrue(test.equals(SimpleWritable.class)); |
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94 | |
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95 | } |
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96 | |
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97 | public void testBadName() throws Exception { |
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98 | Configuration conf = new Configuration(); |
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99 | try { |
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100 | Class<?> test = WritableName.getClass("unknown_junk",conf); |
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101 | assertTrue(false); |
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102 | } catch(IOException e) { |
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103 | assertTrue(e.getMessage().matches(".*unknown_junk.*")); |
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104 | } |
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105 | } |
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106 | |
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107 | } |
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