Package org.apache.hadoop.mrunit.types

Examples of org.apache.hadoop.mrunit.types.TestWritable$Comparator

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    // this test should use the comparator registered inside TestWritable
    // to output the keys in reverse order
    MapReduceDriver<TestWritable,Text,TestWritable,Text,TestWritable,Text> driver
      = MapReduceDriver.newMapReduceDriver(new Mapper(), new Reducer());
   
    driver.withInput(new TestWritable("A1"), new Text("A1"))
      .withInput(new TestWritable("A2"), new Text("A2"))
      .withInput(new TestWritable("A3"), new Text("A3"))
      .withKeyGroupingComparator(new TestWritable.SingleGroupComparator())
      // TODO: these output keys are incorrect because of MRUNIT-129
      .withOutput(new TestWritable("A3"), new Text("A3"))
      .withOutput(new TestWritable("A3"), new Text("A2"))
      .withOutput(new TestWritable("A3"), new Text("A1"))
      //the following are the actual correct outputs
      //.withOutput(new TestWritable("A3"), new Text("A3"))
      //.withOutput(new TestWritable("A2"), new Text("A2"))
      //.withOutput(new TestWritable("A1"), new Text("A1"))
      .runTest(true); //ordering is important
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  @Test
  public void testUseOfWritableRegisteredComparator() throws IOException {
    MapReduceDriver<TestWritable, Text, TestWritable, Text, TestWritable, Text> driver = MapReduceDriver
        .newMapReduceDriver(new IdentityMapper<TestWritable, Text>(),
            new IdentityReducer<TestWritable, Text>());
    driver.withInput(new TestWritable("A1"), new Text("A1"))
      .withInput(new TestWritable("A2"), new Text("A2"))
      .withInput(new TestWritable("A3"), new Text("A3"))
      .withKeyGroupingComparator(new TestWritable.SingleGroupComparator())
      .withOutput(new TestWritable("A3"), new Text("A3"))
      .withOutput(new TestWritable("A3"), new Text("A2"))
      .withOutput(new TestWritable("A3"), new Text("A1"))
      .runTest(true); //ordering is important
  }
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    IdentityMapper<TestWritable, Text> identityMapper = new IdentityMapper<TestWritable, Text>();
    IdentityMapper<TestWritable, Text> anotherIdentityMapper = new IdentityMapper<TestWritable, Text>();
    testDriver.addMapper(identityMapper);
    testDriver.addMapper(anotherIdentityMapper);
    testDriver
        .withInput(identityMapper, new TestWritable("A1"), new Text("A1"))
        .withInput(identityMapper, new TestWritable("A2"), new Text("A2"))
        .withInput(identityMapper, new TestWritable("A3"), new Text("A3"))
        .withInput(anotherIdentityMapper, new TestWritable("B1"),
            new Text("B1"))
        .withInput(anotherIdentityMapper, new TestWritable("B2"),
            new Text("B2"))
        .withKeyGroupingComparator(new TestWritable.SingleGroupComparator())
        .withOutput(new TestWritable("B2"), new Text("B2"))
        .withOutput(new TestWritable("B2"), new Text("B1"))
        .withOutput(new TestWritable("B2"), new Text("A3"))
        .withOutput(new TestWritable("B2"), new Text("A2"))
        .withOutput(new TestWritable("B2"), new Text("A1")).runTest(true); // ordering
                                                                           // is
                                                                           // important
  }
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    // to output the keys in reverse order
    MapReduceDriver<TestWritable, Text, TestWritable, Text, TestWritable, Text> driver = MapReduceDriver
        .newMapReduceDriver(new Mapper(), new Reducer());

    driver
        .withInput(new TestWritable("A1"), new Text("A1"))
        .withInput(new TestWritable("A2"), new Text("A2"))
        .withInput(new TestWritable("A3"), new Text("A3"))
        .withKeyGroupingComparator(new TestWritable.SingleGroupComparator())
        // these output keys are incorrect because of MRUNIT-129
        // .withOutput(new TestWritable("A3"), new Text("A3"))
        // .withOutput(new TestWritable("A3"), new Text("A2"))
        // .withOutput(new TestWritable("A3"), new Text("A1"))
        // the following are the actual correct outputs
        .withOutput(new TestWritable("A3"), new Text("A3"))
        .withOutput(new TestWritable("A2"), new Text("A2"))
        .withOutput(new TestWritable("A1"), new Text("A1")).runTest(true); // ordering
                                                                           // is
                                                                           // important
  }
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    Mapper<TestWritable, Text, TestWritable, Text> identityMapper = new Mapper<TestWritable, Text, TestWritable, Text>();
    Mapper<TestWritable, Text, TestWritable, Text> anotherIdentityMapper = new Mapper<TestWritable, Text, TestWritable, Text>();
    testDriver.addMapper(identityMapper);
    testDriver.addMapper(anotherIdentityMapper);
    testDriver
        .withInput(identityMapper, new TestWritable("A1"), new Text("A1"))
        .withInput(identityMapper, new TestWritable("A2"), new Text("A2"))
        .withInput(identityMapper, new TestWritable("A3"), new Text("A3"))
        .withInput(anotherIdentityMapper, new TestWritable("B1"),
            new Text("B1"))
        .withInput(anotherIdentityMapper, new TestWritable("B2"),
            new Text("B2"))
        .withKeyGroupingComparator(new TestWritable.SingleGroupComparator())
        .withOutput(new TestWritable("B2"), new Text("B2"))
        .withOutput(new TestWritable("B1"), new Text("B1"))
        .withOutput(new TestWritable("A3"), new Text("A3"))
        .withOutput(new TestWritable("A2"), new Text("A2"))
        .withOutput(new TestWritable("A1"), new Text("A1")).runTest(true); // ordering
                                                                           // is
                                                                           // important
  }
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  @Test
  public void testUseOfWritableRegisteredComparator() throws IOException {
    MapReduceDriver<TestWritable, Text, TestWritable, Text, TestWritable, Text> driver = MapReduceDriver
        .newMapReduceDriver(new IdentityMapper<TestWritable, Text>(),
            new IdentityReducer<TestWritable, Text>());
    driver.withInput(new TestWritable("A1"), new Text("A1"))
        .withInput(new TestWritable("A2"), new Text("A2"))
        .withInput(new TestWritable("A3"), new Text("A3"))
        .withKeyGroupingComparator(new TestWritable.SingleGroupComparator())
        .withOutput(new TestWritable("A3"), new Text("A3"))
        .withOutput(new TestWritable("A3"), new Text("A2"))
        .withOutput(new TestWritable("A3"), new Text("A1")).runTest(true); // ordering
                                                                           // is
                                                                           // important
  }
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    IdentityMapper<TestWritable, Text> identityMapper = new IdentityMapper<TestWritable, Text>();
    IdentityMapper<TestWritable, Text> anotherIdentityMapper = new IdentityMapper<TestWritable, Text>();
    testDriver.addMapper(identityMapper);
    testDriver.addMapper(anotherIdentityMapper);
    testDriver
        .withInput(identityMapper, new TestWritable("A1"), new Text("A1"))
        .withInput(identityMapper, new TestWritable("A2"), new Text("A2"))
        .withInput(identityMapper, new TestWritable("A3"), new Text("A3"))
        .withInput(anotherIdentityMapper, new TestWritable("B1"),
            new Text("B1"))
        .withInput(anotherIdentityMapper, new TestWritable("B2"),
            new Text("B2"))
        .withKeyGroupingComparator(new TestWritable.SingleGroupComparator())
        .withOutput(new TestWritable("B2"), new Text("B2"))
        .withOutput(new TestWritable("B2"), new Text("B1"))
        .withOutput(new TestWritable("B2"), new Text("A3"))
        .withOutput(new TestWritable("B2"), new Text("A2"))
        .withOutput(new TestWritable("B2"), new Text("A1")).runTest(true); // ordering
                                                                           // is
                                                                           // important
  }
View Full Code Here
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