| /** |
| * 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.mrunit; |
| |
| import static org.apache.hadoop.mrunit.ExtendedAssert.*; |
| import static org.junit.Assert.*; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.RawComparator; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.io.serializer.JavaSerializationComparator; |
| import org.apache.hadoop.mapred.FileSplit; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.MapReduceBase; |
| import org.apache.hadoop.mapred.Mapper; |
| import org.apache.hadoop.mapred.OutputCollector; |
| import org.apache.hadoop.mapred.Reducer; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.apache.hadoop.mapred.SequenceFileInputFormat; |
| import org.apache.hadoop.mapred.SequenceFileOutputFormat; |
| import org.apache.hadoop.mapred.TextInputFormat; |
| import org.apache.hadoop.mapred.TextOutputFormat; |
| import org.apache.hadoop.mapred.lib.IdentityMapper; |
| import org.apache.hadoop.mapred.lib.IdentityReducer; |
| import org.apache.hadoop.mapred.lib.LongSumReducer; |
| import org.apache.hadoop.mrunit.types.Pair; |
| import org.apache.hadoop.mrunit.types.TestWritable; |
| import org.apache.hadoop.mrunit.types.UncomparableWritable; |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| import com.google.common.collect.Lists; |
| |
| public class TestMapReduceDriver { |
| |
| private static final int FOO_IN_A = 42; |
| private static final int FOO_IN_B = 10; |
| private static final int BAR_IN = 12; |
| private static final int FOO_OUT = 52; |
| |
| @Rule |
| public final ExpectedSuppliedException thrown = ExpectedSuppliedException |
| .none(); |
| private Mapper<Text, LongWritable, Text, LongWritable> mapper; |
| private Reducer<Text, LongWritable, Text, LongWritable> reducer; |
| private MapReduceDriver<Text, LongWritable, Text, LongWritable, Text, LongWritable> driver; |
| |
| private MapReduceDriver<Text, Text, Text, Text, Text, Text> driver2; |
| |
| @Before |
| public void setUp() throws Exception { |
| mapper = new IdentityMapper<Text, LongWritable>(); |
| reducer = new LongSumReducer<Text>(); |
| driver = MapReduceDriver.newMapReduceDriver(mapper, reducer); |
| // for shuffle tests |
| driver2 = MapReduceDriver.newMapReduceDriver(); |
| } |
| |
| @Test |
| public void testRun() throws IOException { |
| final List<Pair<Text, LongWritable>> out = driver |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_A)) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_B)) |
| .withInput(new Text("bar"), new LongWritable(BAR_IN)).run(); |
| |
| final List<Pair<Text, LongWritable>> expected = new ArrayList<Pair<Text, LongWritable>>(); |
| expected.add(new Pair<Text, LongWritable>(new Text("bar"), |
| new LongWritable(BAR_IN))); |
| expected.add(new Pair<Text, LongWritable>(new Text("foo"), |
| new LongWritable(FOO_OUT))); |
| |
| assertListEquals(out, expected); |
| } |
| |
| @Test |
| public void testUncomparable() throws IOException { |
| Text k = new Text("test"); |
| Object v = new UncomparableWritable(2); |
| MapReduceDriver.newMapReduceDriver( |
| new IdentityMapper<Text, Object>(), |
| new IdentityReducer<Text, Object>()) |
| .withInput(k, v).withOutput(k, v).runTest(); |
| } |
| |
| @Test |
| public void testTestRun1() throws IOException { |
| driver.withInput(new Text("foo"), new LongWritable(FOO_IN_A)) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_B)) |
| .withInput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("foo"), new LongWritable(FOO_OUT)).runTest(); |
| } |
| |
| @Test |
| public void testTestRun2() throws IOException { |
| driver.withInput(new Text("foo"), new LongWritable(FOO_IN_A)) |
| .withInput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_B)) |
| .withOutput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("foo"), new LongWritable(FOO_OUT)).runTest(); |
| } |
| |
| @Test |
| public void testTestRun3() throws IOException { |
| thrown.expectAssertionErrorMessage("2 Error(s)"); |
| thrown.expectAssertionErrorMessage("Missing expected output (foo, 52) at position 0, got (bar, 12)."); |
| thrown.expectAssertionErrorMessage("Missing expected output (bar, 12) at position 1, got (foo, 52)."); |
| driver.withInput(new Text("foo"), new LongWritable(FOO_IN_A)) |
| .withInput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(FOO_OUT)) |
| .withOutput(new Text("bar"), new LongWritable(BAR_IN)).runTest(true); |
| } |
| |
| @Test |
| public void testAddAll() throws IOException { |
| final List<Pair<Text, LongWritable>> inputs = new ArrayList<Pair<Text, LongWritable>>(); |
| inputs.add(new Pair<Text, LongWritable>(new Text("foo"), new LongWritable(FOO_IN_A))); |
| inputs.add(new Pair<Text, LongWritable>(new Text("foo"), new LongWritable(FOO_IN_B))); |
| inputs.add(new Pair<Text, LongWritable>(new Text("bar"), new LongWritable(BAR_IN))); |
| |
| final List<Pair<Text, LongWritable>> outputs = new ArrayList<Pair<Text, LongWritable>>(); |
| outputs.add(new Pair<Text, LongWritable>(new Text("bar"), new LongWritable(BAR_IN))); |
| outputs.add(new Pair<Text, LongWritable>(new Text("foo"), new LongWritable(FOO_OUT))); |
| |
| driver.withAll(inputs).withAllOutput(outputs).runTest(); |
| } |
| |
| @Test |
| public void testTestRun3OrderInsensitive() throws IOException { |
| driver.withInput(new Text("foo"), new LongWritable(FOO_IN_A)) |
| .withInput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(FOO_OUT)) |
| .withOutput(new Text("bar"), new LongWritable(BAR_IN)).runTest(false); |
| } |
| |
| @Test |
| public void testDuplicateOutputOrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Received unexpected output (foo, bar))"); |
| driver2.withMapper(new IdentityMapper<Text, Text>()).withReducer( |
| new IdentityReducer<Text, Text>()); |
| driver2.withInput(new Text("foo"), new Text("bar")) |
| .withInput(new Text("foo"), new Text("bar")) |
| .withOutput(new Text("foo"), new Text("bar")).runTest(false); |
| } |
| |
| @Test |
| public void testNoInput() throws IOException { |
| driver = MapReduceDriver.newMapReduceDriver(); |
| thrown.expectMessage(IllegalStateException.class, "No input was provided"); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testEmptyShuffle() { |
| final List<Pair<Text, Text>> inputs = new ArrayList<Pair<Text, Text>>(); |
| final List<Pair<Text, List<Text>>> outputs = driver2.shuffle(inputs); |
| assertEquals(0, outputs.size()); |
| } |
| |
| // just shuffle a single (k, v) pair |
| @Test |
| public void testSingleShuffle() { |
| final List<Pair<Text, Text>> inputs = new ArrayList<Pair<Text, Text>>(); |
| inputs.add(new Pair<Text, Text>(new Text("a"), new Text("b"))); |
| |
| final List<Pair<Text, List<Text>>> outputs = driver2.shuffle(inputs); |
| |
| final List<Pair<Text, List<Text>>> expected = new ArrayList<Pair<Text, List<Text>>>(); |
| final List<Text> sublist = new ArrayList<Text>(); |
| sublist.add(new Text("b")); |
| expected.add(new Pair<Text, List<Text>>(new Text("a"), sublist)); |
| |
| assertListEquals(expected, outputs); |
| } |
| |
| // shuffle multiple values from the same key. |
| @Test |
| public void testShuffleOneKey() { |
| final List<Pair<Text, Text>> inputs = new ArrayList<Pair<Text, Text>>(); |
| inputs.add(new Pair<Text, Text>(new Text("a"), new Text("b"))); |
| inputs.add(new Pair<Text, Text>(new Text("a"), new Text("c"))); |
| |
| final List<Pair<Text, List<Text>>> outputs = driver2.shuffle(inputs); |
| |
| final List<Pair<Text, List<Text>>> expected = new ArrayList<Pair<Text, List<Text>>>(); |
| final List<Text> sublist = new ArrayList<Text>(); |
| sublist.add(new Text("b")); |
| sublist.add(new Text("c")); |
| expected.add(new Pair<Text, List<Text>>(new Text("a"), sublist)); |
| |
| assertListEquals(expected, outputs); |
| } |
| |
| // shuffle multiple keys |
| @Test |
| public void testMultiShuffle1() { |
| final List<Pair<Text, Text>> inputs = new ArrayList<Pair<Text, Text>>(); |
| inputs.add(new Pair<Text, Text>(new Text("a"), new Text("x"))); |
| inputs.add(new Pair<Text, Text>(new Text("b"), new Text("z"))); |
| inputs.add(new Pair<Text, Text>(new Text("b"), new Text("w"))); |
| inputs.add(new Pair<Text, Text>(new Text("a"), new Text("y"))); |
| |
| final List<Pair<Text, List<Text>>> outputs = driver2.shuffle(inputs); |
| |
| final List<Pair<Text, List<Text>>> expected = new ArrayList<Pair<Text, List<Text>>>(); |
| final List<Text> sublist1 = new ArrayList<Text>(); |
| sublist1.add(new Text("x")); |
| sublist1.add(new Text("y")); |
| expected.add(new Pair<Text, List<Text>>(new Text("a"), sublist1)); |
| |
| final List<Text> sublist2 = new ArrayList<Text>(); |
| sublist2.add(new Text("z")); |
| sublist2.add(new Text("w")); |
| expected.add(new Pair<Text, List<Text>>(new Text("b"), sublist2)); |
| |
| assertListEquals(expected, outputs); |
| } |
| |
| // shuffle multiple keys that are out-of-order to start. |
| @Test |
| public void testMultiShuffle2() { |
| final List<Pair<Text, Text>> inputs = new ArrayList<Pair<Text, Text>>(); |
| inputs.add(new Pair<Text, Text>(new Text("b"), new Text("z"))); |
| inputs.add(new Pair<Text, Text>(new Text("a"), new Text("x"))); |
| inputs.add(new Pair<Text, Text>(new Text("b"), new Text("w"))); |
| inputs.add(new Pair<Text, Text>(new Text("a"), new Text("y"))); |
| |
| final List<Pair<Text, List<Text>>> outputs = driver2.shuffle(inputs); |
| |
| final List<Pair<Text, List<Text>>> expected = new ArrayList<Pair<Text, List<Text>>>(); |
| final List<Text> sublist1 = new ArrayList<Text>(); |
| sublist1.add(new Text("x")); |
| sublist1.add(new Text("y")); |
| expected.add(new Pair<Text, List<Text>>(new Text("a"), sublist1)); |
| |
| final List<Text> sublist2 = new ArrayList<Text>(); |
| sublist2.add(new Text("z")); |
| sublist2.add(new Text("w")); |
| expected.add(new Pair<Text, List<Text>>(new Text("b"), sublist2)); |
| |
| assertListEquals(expected, outputs); |
| } |
| |
| // Test "combining" with an IdentityReducer. Result should be the same. |
| @Test |
| public void testIdentityCombiner() throws IOException { |
| driver.withCombiner(new IdentityReducer<Text, LongWritable>()) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_A)) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_B)) |
| .withInput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("foo"), new LongWritable(FOO_OUT)).runTest(); |
| } |
| |
| // Test "combining" with another LongSumReducer. Result should be the same. |
| @Test |
| public void testLongSumCombiner() throws IOException { |
| driver.withCombiner(new LongSumReducer<Text>()) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_A)) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_B)) |
| .withInput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("foo"), new LongWritable(FOO_OUT)).runTest(); |
| } |
| |
| // Test "combining" with another LongSumReducer, and with the Reducer |
| // set to IdentityReducer. Result should be the same. |
| @Test |
| public void testLongSumCombinerAndIdentityReduce() throws IOException { |
| driver.withCombiner(new LongSumReducer<Text>()) |
| .withReducer(new IdentityReducer<Text, LongWritable>()) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_A)) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_B)) |
| .withInput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("foo"), new LongWritable(FOO_OUT)).runTest(); |
| } |
| |
| @Test |
| public void testRepeatRun() throws IOException { |
| driver.withCombiner(new IdentityReducer<Text, LongWritable>()) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_A)) |
| .withInput(new Text("foo"), new LongWritable(FOO_IN_B)) |
| .withInput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("bar"), new LongWritable(BAR_IN)) |
| .withOutput(new Text("foo"), new LongWritable(FOO_OUT)).runTest(); |
| thrown.expectMessage(IllegalStateException.class, "Driver reuse not allowed"); |
| driver.runTest(); |
| } |
| |
| /** |
| * group comparator - group by first character |
| */ |
| public static class FirstCharComparator implements RawComparator<Text> { |
| |
| @Override |
| public int compare(final Text o1, final Text o2) { |
| return o1.toString().substring(0, 1) |
| .compareTo(o2.toString().substring(0, 1)); |
| } |
| |
| @Override |
| public int compare(final byte[] arg0, final int arg1, final int arg2, |
| final byte[] arg3, final int arg4, final int arg5) { |
| throw new RuntimeException("Not implemented"); |
| } |
| |
| } |
| |
| /** |
| * value order comparator - order by second character |
| */ |
| public static class SecondCharComparator implements RawComparator<Text> { |
| @Override |
| public int compare(final Text o1, final Text o2) { |
| return o1.toString().substring(1, 2) |
| .compareTo(o2.toString().substring(1, 2)); |
| } |
| |
| @Override |
| public int compare(final byte[] arg0, final int arg1, final int arg2, |
| final byte[] arg3, final int arg4, final int arg5) { |
| throw new RuntimeException("Not implemented"); |
| } |
| } |
| |
| // Test the key grouping and value ordering comparators |
| @Test |
| public void testComparators() throws IOException { |
| // reducer to track the order of the input values using bit shifting |
| driver.withReducer(new Reducer<Text, LongWritable, Text, LongWritable>() { |
| @Override |
| public void reduce(final Text key, final Iterator<LongWritable> values, |
| final OutputCollector<Text, LongWritable> output, |
| final Reporter reporter) throws IOException { |
| long outputValue = 0; |
| int count = 0; |
| while (values.hasNext()) { |
| outputValue |= (values.next().get() << (count++ * 8)); |
| } |
| |
| output.collect(key, new LongWritable(outputValue)); |
| } |
| |
| @Override |
| public void configure(final JobConf job) { |
| } |
| |
| @Override |
| public void close() throws IOException { |
| } |
| }); |
| |
| driver.withKeyGroupingComparator(new FirstCharComparator()); |
| driver.withKeyOrderComparator(new SecondCharComparator()); |
| |
| driver.addInput(new Text("a1"), new LongWritable(1)); |
| driver.addInput(new Text("b1"), new LongWritable(1)); |
| driver.addInput(new Text("a3"), new LongWritable(3)); |
| driver.addInput(new Text("a2"), new LongWritable(2)); |
| |
| driver.addOutput(new Text("a1"), new LongWritable(0x1)); |
| driver.addOutput(new Text("b1"), new LongWritable(0x1)); |
| driver.addOutput(new Text("a2"), new LongWritable(0x2 | (0x3 << 8))); |
| |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testNoMapper() throws IOException { |
| driver = MapReduceDriver.newMapReduceDriver(); |
| driver.withReducer(reducer).withInput(new Text("a"), new LongWritable(0)); |
| thrown.expectMessage(IllegalStateException.class, |
| "No Mapper class was provided"); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testNoReducer() throws IOException { |
| driver = MapReduceDriver.newMapReduceDriver(); |
| driver.withMapper(mapper).withInput(new Text("a"), new LongWritable(0)); |
| thrown.expectMessage(IllegalStateException.class, |
| "No Reducer class was provided"); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testWithCounter() throws IOException { |
| MapReduceDriver<Text, Text, Text, Text, Text, Text> driver = MapReduceDriver |
| .newMapReduceDriver(); |
| |
| driver |
| .withMapper( |
| new TestMapDriver.MapperWithCounters<Text, Text, Text, Text>()) |
| .withInput(new Text("hie"), new Text("Hi")) |
| .withOutput(new Text("hie"), new Text("Hi")) |
| .withCounter(TestMapDriver.MapperWithCounters.Counters.X, 1) |
| .withCounter("category", "name", 1) |
| .withReducer( |
| new TestReduceDriver.ReducerWithCounters<Text, Text, Text, Text>()) |
| .withCounter(TestReduceDriver.ReducerWithCounters.Counters.COUNT, 1) |
| .withCounter(TestReduceDriver.ReducerWithCounters.Counters.SUM, 1) |
| .withCounter("category", "count", 1).withCounter("category", "sum", 1) |
| .runTest(); |
| } |
| |
| @Test |
| public void testWithCounterAndNoneMissing() throws IOException { |
| MapReduceDriver<Text, Text, Text, Text, Text, Text> driver = MapReduceDriver |
| .newMapReduceDriver(); |
| |
| driver |
| .withMapper( |
| new TestMapDriver.MapperWithCounters<Text, Text, Text, Text>()) |
| .withInput(new Text("hie"), new Text("Hi")) |
| .withOutput(new Text("hie"), new Text("Hi")) |
| .withStrictCounterChecking() |
| .withCounter(TestMapDriver.MapperWithCounters.Counters.X, 1) |
| .withCounter("category", "name", 1) |
| .withReducer( |
| new TestReduceDriver.ReducerWithCounters<Text, Text, Text, Text>()) |
| .withCounter(TestReduceDriver.ReducerWithCounters.Counters.COUNT, 1) |
| .withCounter(TestReduceDriver.ReducerWithCounters.Counters.SUM, 1) |
| .withCounter("category", "count", 1).withCounter("category", "sum", 1) |
| .runTest(); |
| } |
| |
| @Test |
| public void testWithCounterAndEnumCounterMissing() throws IOException { |
| MapReduceDriver<Text, Text, Text, Text, Text, Text> driver = MapReduceDriver |
| .newMapReduceDriver(); |
| |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Actual counter (" |
| + "\"org.apache.hadoop.mrunit.TestMapDriver$MapperWithCounters$Counters\",\"X\")" |
| + " was not found in expected counters"); |
| |
| driver |
| .withMapper( |
| new TestMapDriver.MapperWithCounters<Text, Text, Text, Text>()) |
| .withInput(new Text("hie"), new Text("Hi")) |
| .withOutput(new Text("hie"), new Text("Hi")) |
| .withStrictCounterChecking() |
| .withCounter("category", "name", 1) |
| .withReducer( |
| new TestReduceDriver.ReducerWithCounters<Text, Text, Text, Text>()) |
| .withCounter(TestReduceDriver.ReducerWithCounters.Counters.COUNT, 1) |
| .withCounter(TestReduceDriver.ReducerWithCounters.Counters.SUM, 1) |
| .withCounter("category", "count", 1).withCounter("category", "sum", 1) |
| .runTest(); |
| } |
| |
| @Test |
| public void testWithCounterAndStringCounterMissing() throws IOException { |
| MapReduceDriver<Text, Text, Text, Text, Text, Text> driver = MapReduceDriver |
| .newMapReduceDriver(); |
| |
| thrown.expectAssertionErrorMessage("1 Error(s): (Actual counter (" |
| + "\"category\",\"name\")" + " was not found in expected counters"); |
| |
| driver |
| .withMapper( |
| new TestMapDriver.MapperWithCounters<Text, Text, Text, Text>()) |
| .withInput(new Text("hie"), new Text("Hi")) |
| .withOutput(new Text("hie"), new Text("Hi")) |
| .withStrictCounterChecking() |
| .withCounter(TestMapDriver.MapperWithCounters.Counters.X, 1) |
| .withReducer( |
| new TestReduceDriver.ReducerWithCounters<Text, Text, Text, Text>()) |
| .withCounter(TestReduceDriver.ReducerWithCounters.Counters.COUNT, 1) |
| .withCounter(TestReduceDriver.ReducerWithCounters.Counters.SUM, 1) |
| .withCounter("category", "count", 1).withCounter("category", "sum", 1) |
| .runTest(); |
| } |
| |
| @Test |
| public void testWithFailedCounter() throws IOException { |
| MapReduceDriver<Text, Text, Text, Text, Text, Text> driver = MapReduceDriver |
| .newMapReduceDriver(); |
| |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (" |
| + "Counter org.apache.hadoop.mrunit.TestMapDriver.MapperWithCounters.Counters.X has value 1 instead of expected 20, " |
| + "Counter with category category and name name has value 1 instead of expected 20)"); |
| |
| driver |
| .withMapper( |
| new TestMapDriver.MapperWithCounters<Text, Text, Text, Text>()) |
| .withInput(new Text("hie"), new Text("Hi")) |
| .withOutput(new Text("hie"), new Text("Hi")) |
| .withCounter(TestMapDriver.MapperWithCounters.Counters.X, 20) |
| .withReducer( |
| new TestReduceDriver.ReducerWithCounters<Text, Text, Text, Text>()) |
| .withCounter("category", "name", 20).runTest(); |
| } |
| |
| public static final RawComparator<Integer> INTEGER_COMPARATOR = new RawComparator<Integer>() { |
| |
| @Override |
| public int compare(Integer o1, Integer o2) { |
| return o1.compareTo(o2); |
| } |
| |
| @Override |
| public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| }; |
| |
| @Test |
| public void testJavaSerialization() throws IOException { |
| final Configuration conf = new Configuration(); |
| conf.setStrings("io.serializations", conf.get("io.serializations"), |
| "org.apache.hadoop.io.serializer.JavaSerialization"); |
| final MapReduceDriver<Integer, IntWritable, Integer, IntWritable, Integer, IntWritable> driver = MapReduceDriver |
| .newMapReduceDriver(new IdentityMapper<Integer, IntWritable>(), |
| new IdentityReducer<Integer, IntWritable>()) |
| .withConfiguration(conf); |
| driver.withKeyOrderComparator(new JavaSerializationComparator<Integer>()); |
| driver.withKeyGroupingComparator(INTEGER_COMPARATOR); |
| driver.withInput(1, new IntWritable(2)).withInput(2, new IntWritable(3)); |
| driver.withOutput(1, new IntWritable(2)).withOutput(2, new IntWritable(3)); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testCopy() throws IOException { |
| final Text key = new Text("a"); |
| final LongWritable value = new LongWritable(1); |
| driver.addInput(key, value); |
| key.set("b"); |
| value.set(2); |
| driver.addInput(key, value); |
| |
| key.set("a"); |
| value.set(1); |
| driver.addOutput(key, value); |
| key.set("b"); |
| value.set(2); |
| driver.addOutput(key, value); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testOutputFormat() throws IOException { |
| driver.withOutputFormat(SequenceFileOutputFormat.class, |
| SequenceFileInputFormat.class); |
| driver.withInput(new Text("a"), new LongWritable(1)); |
| driver.withInput(new Text("a"), new LongWritable(2)); |
| driver.withOutput(new Text("a"), new LongWritable(3)); |
| driver.runTest(); |
| } |
| |
| @SuppressWarnings({ "unchecked", "rawtypes" }) |
| @Test |
| public void testOutputFormatWithMismatchInOutputClasses() throws IOException { |
| final MapReduceDriver driver = this.driver; |
| driver.withOutputFormat(TextOutputFormat.class, TextInputFormat.class); |
| driver.withInput(new Text("a"), new LongWritable(1)); |
| driver.withInput(new Text("a"), new LongWritable(2)); |
| driver.withOutput(new LongWritable(), new Text("a\t3")); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testMapInputFile() throws IOException { |
| InputPathStoringMapper<LongWritable,LongWritable> mapper = |
| new InputPathStoringMapper<LongWritable,LongWritable>(); |
| Path mapInputPath = new Path("myfile"); |
| driver = MapReduceDriver.newMapReduceDriver(mapper, reducer); |
| driver.setMapInputPath(mapInputPath); |
| assertEquals(mapInputPath.getName(), driver.getMapInputPath().getName()); |
| driver.withInput(new Text("a"), new LongWritable(1)); |
| driver.runTest(); |
| assertNotNull(mapper.getMapInputPath()); |
| assertEquals(mapInputPath.getName(), mapper.getMapInputPath().getName()); |
| } |
| |
| @Test |
| public void testGroupingComparatorBehaviour1() throws IOException { |
| driver.withInput(new Text("A1"),new LongWritable(1L)) |
| .withInput(new Text("A2"),new LongWritable(1L)) |
| .withInput(new Text("B1"),new LongWritable(1L)) |
| .withInput(new Text("B2"),new LongWritable(1L)) |
| .withInput(new Text("C1"),new LongWritable(1L)) |
| .withOutput(new Text("A1"),new LongWritable(2L)) |
| .withOutput(new Text("B1"),new LongWritable(2L)) |
| .withOutput(new Text("C1"),new LongWritable(1L)) |
| .withKeyGroupingComparator(new FirstCharComparator()) |
| .runTest(false); |
| } |
| |
| @Test |
| public void testGroupingComparatorBehaviour2() throws IOException { |
| // this test fails pre-MRUNIT-127 because of the incorrect |
| // grouping of reduce keys in "shuffle". |
| // MapReduce doesn't group keys which aren't in a contiguous |
| // range when sorted by their sorting comparator. |
| driver.withInput(new Text("1A"),new LongWritable(1L)) |
| .withInput(new Text("2A"),new LongWritable(1L)) |
| .withInput(new Text("1B"),new LongWritable(1L)) |
| .withInput(new Text("2B"),new LongWritable(1L)) |
| .withInput(new Text("1C"),new LongWritable(1L)) |
| .withOutput(new Text("1A"),new LongWritable(1L)) |
| .withOutput(new Text("2A"),new LongWritable(1L)) |
| .withOutput(new Text("1B"),new LongWritable(1L)) |
| .withOutput(new Text("2B"),new LongWritable(1L)) |
| .withOutput(new Text("1C"),new LongWritable(1L)) |
| .withKeyGroupingComparator(new SecondCharComparator()) |
| .runTest(false); |
| } |
| |
| @Test |
| public void testGroupingComparatorSpecifiedByConf() throws IOException { |
| JobConf conf = new JobConf(new Configuration()); |
| conf.setOutputValueGroupingComparator(FirstCharComparator.class); |
| driver.withInput(new Text("A1"),new LongWritable(1L)) |
| .withInput(new Text("A2"),new LongWritable(1L)) |
| .withInput(new Text("B1"),new LongWritable(1L)) |
| .withInput(new Text("B2"),new LongWritable(1L)) |
| .withInput(new Text("C1"),new LongWritable(1L)) |
| .withOutput(new Text("A1"),new LongWritable(2L)) |
| .withOutput(new Text("B1"),new LongWritable(2L)) |
| .withOutput(new Text("C1"),new LongWritable(1L)) |
| .withConfiguration(conf) |
| .runTest(false); |
| } |
| |
| @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 |
| } |
| |
| } |
