| /** |
| * 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.mapreduce; |
| |
| import static org.apache.hadoop.mrunit.ExtendedAssert.*; |
| import static org.junit.Assert.*; |
| import static org.mockito.Matchers.*; |
| import static org.mockito.Mockito.*; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Reducer; |
| import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat; |
| import org.apache.hadoop.mapreduce.lib.input.TextInputFormat; |
| import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat; |
| import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat; |
| import org.apache.hadoop.mapreduce.lib.reduce.IntSumReducer; |
| import org.apache.hadoop.mapreduce.lib.reduce.LongSumReducer; |
| import org.apache.hadoop.mrunit.ExpectedSuppliedException; |
| import org.apache.hadoop.mrunit.types.Pair; |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| public class TestReduceDriver { |
| |
| private static final int IN_A = 4; |
| private static final int IN_B = 6; |
| private static final int OUT_VAL = 10; |
| private static final int INCORRECT_OUT = 12; |
| @Rule |
| public final ExpectedSuppliedException thrown = ExpectedSuppliedException |
| .none(); |
| private Reducer<Text, LongWritable, Text, LongWritable> reducer; |
| private ReduceDriver<Text, LongWritable, Text, LongWritable> driver; |
| private ReduceFeeder<Text, LongWritable> reduceFeeder; |
| |
| @Before |
| public void setUp() throws Exception { |
| reducer = new LongSumReducer<Text>(); |
| driver = ReduceDriver.newReduceDriver(reducer); |
| reduceFeeder = new ReduceFeeder<Text, LongWritable>(driver.getConfiguration()); |
| } |
| |
| @Test |
| public void testRun() throws IOException { |
| final List<Pair<Text, LongWritable>> out = driver |
| .withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)).run(); |
| |
| final List<Pair<Text, LongWritable>> expected = new ArrayList<Pair<Text, LongWritable>>(); |
| expected.add(new Pair<Text, LongWritable>(new Text("foo"), |
| new LongWritable(OUT_VAL))); |
| |
| assertListEquals(out, expected); |
| |
| } |
| |
| @Test |
| public void testTestRun1() throws IOException { |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(OUT_VAL)).runTest(); |
| } |
| |
| @Test |
| public void testTestRun2() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (bar, 10) at position 0., " |
| + "Received unexpected output (foo, 10) at position 0.)"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("bar"), new LongWritable(OUT_VAL)).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun2OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (bar, 10), " |
| + "Received unexpected output (foo, 10))"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("bar"), new LongWritable(OUT_VAL)).runTest(false); |
| } |
| |
| @Test |
| public void testTestRun3() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (foo, 12) at position 0., " |
| + "Received unexpected output (foo, 10) at position 0.)"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(INCORRECT_OUT)) |
| .runTest(true); |
| } |
| |
| @Test |
| public void testTestRun3OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (foo, 12), " |
| + "Received unexpected output (foo, 10))"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(INCORRECT_OUT)) |
| .runTest(false); |
| } |
| |
| @Test |
| public void testTestRun4() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (foo, 4) at position 0., " |
| + "Received unexpected output (foo, 10) at position 0.)"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(IN_A)).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun4OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (foo, 4), " |
| + "Received unexpected output (foo, 10))"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(IN_A)).runTest(false); |
| } |
| |
| @Test |
| public void testTestRun5() throws IOException { |
| thrown.expectAssertionErrorMessage("3 Error(s)"); |
| thrown.expectAssertionErrorMessage("Missing expected output (foo, 6) at position 1."); |
| thrown.expectAssertionErrorMessage("Missing expected output (foo, 4) at position 0."); |
| thrown.expectAssertionErrorMessage("Received unexpected output (foo, 10) at position 0."); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(IN_A)) |
| .withOutput(new Text("foo"), new LongWritable(IN_B)).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun5OrderInsensitive() throws IOException { |
| thrown.expectAssertionErrorMessage("3 Error(s)"); |
| thrown.expectAssertionErrorMessage("Missing expected output (foo, 6)"); |
| thrown.expectAssertionErrorMessage("Missing expected output (foo, 4)"); |
| thrown.expectAssertionErrorMessage("Received unexpected output (foo, 10)"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(IN_A)) |
| .withOutput(new Text("foo"), new LongWritable(IN_B)).runTest(false); |
| } |
| |
| @Test |
| public void testTestRun6() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Missing expected output (foo, 10) at position 1.)"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(OUT_VAL)) |
| .withOutput(new Text("foo"), new LongWritable(OUT_VAL)).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun6OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Missing expected output (foo, 10))"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(OUT_VAL)) |
| .withOutput(new Text("foo"), new LongWritable(OUT_VAL)).runTest(false); |
| } |
| |
| @Test |
| public void testTestRun7() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (Missing expected output (bar, 10) at position 0., " |
| + "Matched expected output (foo, 10) but at incorrect position 0 (expected position 1))"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("bar"), new LongWritable(OUT_VAL)) |
| .withOutput(new Text("foo"), new LongWritable(OUT_VAL)).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun7OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Missing expected output (bar, 10))"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("bar"), new LongWritable(OUT_VAL)) |
| .withOutput(new Text("foo"), new LongWritable(OUT_VAL)).runTest(false); |
| } |
| |
| @Test |
| public void testTestRun8() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Missing expected output (bar, 10) at position 1.)"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(OUT_VAL)) |
| .withOutput(new Text("bar"), new LongWritable(OUT_VAL)).runTest(true); |
| } |
| |
| @Test |
| public void testTestRun8OrderInsensitive() throws IOException { |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Missing expected output (bar, 10))"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .withInputValue(new LongWritable(IN_B)) |
| .withOutput(new Text("foo"), new LongWritable(OUT_VAL)) |
| .withOutput(new Text("bar"), new LongWritable(OUT_VAL)).runTest(false); |
| } |
| |
| @Test |
| public void testAddAll() throws IOException { |
| final List<LongWritable> vals = new ArrayList<LongWritable>(); |
| vals.add(new LongWritable(IN_A)); |
| vals.add(new LongWritable(IN_B)); |
| |
| final List<Pair<Text, List<LongWritable>>> inputs = new ArrayList<Pair<Text, List<LongWritable>>>(); |
| inputs.add(new Pair<Text, List<LongWritable>>(new Text("foo"), vals)); |
| |
| final List<Pair<Text, LongWritable>> expected = new ArrayList<Pair<Text, LongWritable>>(); |
| expected.add(new Pair<Text, LongWritable>(new Text("foo"), |
| new LongWritable(OUT_VAL))); |
| |
| driver.withAll(inputs).withAllOutput(expected).runTest(); |
| } |
| |
| @Test |
| public void testAddAllElements() throws IOException { |
| final List<Pair<Text, LongWritable>> input = new ArrayList<Pair<Text, LongWritable>>(); |
| input.add(new Pair<Text, LongWritable>(new Text("foo"), new LongWritable(IN_A))); |
| input.add(new Pair<Text, LongWritable>(new Text("foo"), new LongWritable(IN_B))); |
| |
| final List<Pair<Text, LongWritable>> expected = new ArrayList<Pair<Text, LongWritable>>(); |
| expected.add(new Pair<Text, LongWritable>(new Text("foo"), |
| new LongWritable(OUT_VAL))); |
| |
| driver.withAllElements(reduceFeeder.sortAndGroup(input)).withAllOutput(expected).runTest(); |
| } |
| |
| @Test |
| public void testNoInput() throws IOException { |
| driver = ReduceDriver.newReduceDriver(); |
| thrown.expectMessage(IllegalStateException.class, "No input was provided"); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void testRepeatRun() throws IOException { |
| final List<LongWritable> vals = new ArrayList<LongWritable>(); |
| vals.add(new LongWritable(IN_A)); |
| vals.add(new LongWritable(IN_B)); |
| |
| final List<Pair<Text, List<LongWritable>>> inputs = new ArrayList<Pair<Text, List<LongWritable>>>(); |
| inputs.add(new Pair<Text, List<LongWritable>>(new Text("foo"), vals)); |
| |
| final List<Pair<Text, LongWritable>> expected = new ArrayList<Pair<Text, LongWritable>>(); |
| expected.add(new Pair<Text, LongWritable>(new Text("foo"), |
| new LongWritable(OUT_VAL))); |
| |
| driver.withAll(inputs).withAllOutput(expected).runTest(); |
| thrown.expectMessage(IllegalStateException.class, "Driver reuse not allowed"); |
| driver.withAll(inputs).withAllOutput(expected).runTest(); |
| } |
| |
| /** |
| * Reducer that counts its values twice; the second iteration according to |
| * mapreduce semantics should be empty. |
| */ |
| private static class DoubleIterReducer<K, V> extends |
| Reducer<K, V, K, LongWritable> { |
| @Override |
| @SuppressWarnings("unused") |
| public void reduce(final K key, final Iterable<V> values, final Context c) |
| throws IOException, InterruptedException { |
| long count = 0; |
| |
| for (final V val : values) { |
| count++; |
| } |
| |
| // This time around, iteration should yield no values. |
| for (final V val : values) { |
| count++; |
| } |
| c.write(key, new LongWritable(count)); |
| } |
| } |
| |
| @Test |
| public void testDoubleIteration() throws IOException { |
| reducer = new DoubleIterReducer<Text, LongWritable>(); |
| driver = ReduceDriver.newReduceDriver(reducer); |
| |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(1)) |
| .withInputValue(new LongWritable(1)) |
| .withInputValue(new LongWritable(1)) |
| .withInputValue(new LongWritable(1)) |
| .withOutput(new Text("foo"), new LongWritable(4)).runTest(); |
| } |
| |
| @Test |
| public void testConfiguration() throws IOException { |
| final Configuration conf = new Configuration(); |
| conf.set("TestKey", "TestValue"); |
| final ReduceDriver<NullWritable, NullWritable, NullWritable, NullWritable> confDriver = ReduceDriver |
| .newReduceDriver(); |
| final ConfigurationReducer<NullWritable, NullWritable, NullWritable, NullWritable> reducer = new ConfigurationReducer<NullWritable, NullWritable, NullWritable, NullWritable>(); |
| confDriver.withReducer(reducer).withConfiguration(conf) |
| .withInput(NullWritable.get(), Arrays.asList(NullWritable.get())) |
| .withOutput(NullWritable.get(), NullWritable.get()).runTest(); |
| assertEquals(reducer.setupConfiguration.get("TestKey"), "TestValue"); |
| } |
| |
| @Test |
| public void testWithCounter() throws IOException { |
| final ReduceDriver<Text, Text, Text, Text> driver = ReduceDriver |
| .newReduceDriver(); |
| ReduceFeeder<Text, Text> reduceFeeder = new ReduceFeeder<Text, Text>(driver.getConfiguration()); |
| |
| final LinkedList<Text> values = new LinkedList<Text>(); |
| values.add(new Text("a")); |
| values.add(new Text("b")); |
| |
| driver.withReducer(new ReducerWithCounters<Text, Text, Text, Text>()) |
| .withInput(reduceFeeder.updateInput(new Text("hie"), values)) |
| .withCounter(ReducerWithCounters.Counters.COUNT, 1) |
| .withCounter(ReducerWithCounters.Counters.SUM, 2) |
| .withCounter("category", "count", 1).withCounter("category", "sum", 2) |
| .runTest(); |
| } |
| |
| @Test |
| public void testWithCounterAndNoneMissing() throws IOException { |
| final ReduceDriver<Text, Text, Text, Text> driver = ReduceDriver |
| .newReduceDriver(); |
| ReduceFeeder<Text, Text> reduceFeeder = new ReduceFeeder<Text, Text>(driver.getConfiguration()); |
| |
| final LinkedList<Text> values = new LinkedList<Text>(); |
| values.add(new Text("a")); |
| values.add(new Text("b")); |
| |
| driver.withReducer(new ReducerWithCounters<Text, Text, Text, Text>()) |
| .withInput(reduceFeeder.updateInput(new Text("hie"), values)) |
| .withStrictCounterChecking() |
| .withCounter(ReducerWithCounters.Counters.COUNT, 1) |
| .withCounter(ReducerWithCounters.Counters.SUM, 2) |
| .withCounter("category", "count", 1).withCounter("category", "sum", 2) |
| .runTest(); |
| } |
| |
| @Test |
| public void testWithCounterAndEnumCounterMissing() throws IOException { |
| final ReduceDriver<Text, Text, Text, Text> driver = ReduceDriver |
| .newReduceDriver(); |
| ReduceFeeder<Text, Text> reduceFeeder = new ReduceFeeder<Text, Text>(driver.getConfiguration()); |
| |
| thrown |
| .expectAssertionErrorMessage("1 Error(s): (Actual counter (" |
| + "\"org.apache.hadoop.mrunit.mapreduce.TestReduceDriver$ReducerWithCounters$Counters\",\"COUNT\")" |
| + " was not found in expected counters"); |
| |
| final LinkedList<Text> values = new LinkedList<Text>(); |
| values.add(new Text("a")); |
| values.add(new Text("b")); |
| |
| driver.withReducer(new ReducerWithCounters<Text, Text, Text, Text>()) |
| .withInput(reduceFeeder.updateInput(new Text("hie"), values)) |
| .withStrictCounterChecking() |
| .withCounter(ReducerWithCounters.Counters.SUM, 2) |
| .withCounter("category", "count", 1).withCounter("category", "sum", 2) |
| .runTest(); |
| } |
| |
| @Test |
| public void testWithCounterAndStringCounterMissing() throws IOException { |
| final ReduceDriver<Text, Text, Text, Text> driver = ReduceDriver |
| .newReduceDriver(); |
| ReduceFeeder<Text, Text> reduceFeeder = new ReduceFeeder<Text, Text>(driver.getConfiguration()); |
| |
| thrown.expectAssertionErrorMessage("1 Error(s): (Actual counter (" |
| + "\"category\",\"count\")" + " was not found in expected counters"); |
| |
| final LinkedList<Text> values = new LinkedList<Text>(); |
| values.add(new Text("a")); |
| values.add(new Text("b")); |
| |
| driver.withReducer(new ReducerWithCounters<Text, Text, Text, Text>()) |
| .withInput(reduceFeeder.updateInput(new Text("hie"), values)) |
| .withStrictCounterChecking() |
| .withCounter(ReducerWithCounters.Counters.COUNT, 1) |
| .withCounter(ReducerWithCounters.Counters.SUM, 2) |
| .withCounter("category", "sum", 2).runTest(); |
| } |
| |
| @Test |
| public void testWithFailedCounter() throws IOException { |
| final ReduceDriver<Text, Text, Text, Text> driver = ReduceDriver |
| .newReduceDriver(); |
| |
| thrown |
| .expectAssertionErrorMessage("2 Error(s): (" |
| + "Counter org.apache.hadoop.mrunit.mapreduce.TestReduceDriver.ReducerWithCounters.Counters.SUM has value 1 instead of expected 4, " |
| + "Counter with category category and name sum has value 1 instead of expected 4)"); |
| |
| driver.withReducer(new ReducerWithCounters<Text, Text, Text, Text>()) |
| .withInputKey(new Text("hie")).withInputValue(new Text("")) |
| .withCounter(ReducerWithCounters.Counters.SUM, 4) |
| .withCounter("category", "sum", 4).runTest(); |
| } |
| |
| /** |
| * Test reducer which stores the configuration object it was passed during its |
| * setup method |
| */ |
| public static class ConfigurationReducer<KEYIN, VALUEIN, KEYOUT, VALUEOUT> |
| extends Reducer<KEYIN, VALUEIN, KEYOUT, VALUEOUT> { |
| public Configuration setupConfiguration; |
| |
| @Override |
| protected void setup(final Context context) throws IOException, |
| InterruptedException { |
| setupConfiguration = context.getConfiguration(); |
| } |
| } |
| |
| @Test |
| public void testNoReducer() throws IOException { |
| driver = ReduceDriver.newReduceDriver(); |
| thrown.expectMessage(IllegalStateException.class, |
| "No Reducer class was provided"); |
| driver.withInputKey(new Text("foo")).withInputValue(new LongWritable(IN_A)) |
| .runTest(); |
| } |
| |
| /** |
| * Simple reducer that have custom counters that are increased each map() call |
| */ |
| public static class ReducerWithCounters<KI, VI, KO, VO> extends |
| Reducer<KI, VI, KO, VO> { |
| public static enum Counters { |
| COUNT, SUM |
| } |
| |
| @Override |
| protected void reduce(final KI key, final Iterable<VI> values, |
| final Context context) throws IOException, InterruptedException { |
| context.getCounter(Counters.COUNT).increment(1); |
| context.getCounter("category", "count").increment(1); |
| for (@SuppressWarnings("unused") final VI vi : values) { |
| context.getCounter(Counters.SUM).increment(1); |
| context.getCounter("category", "sum").increment(1); |
| } |
| } |
| } |
| |
| @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 ReduceDriver<Integer, IntWritable, Integer, IntWritable> driver = ReduceDriver |
| .newReduceDriver(new IntSumReducer<Integer>()).withConfiguration(conf); |
| driver.withInputKey(1).withInputValue(new IntWritable(2)) |
| .withOutput(1, new IntWritable(2)).runTest(); |
| } |
| |
| @Test |
| public void testOutputFormat() throws IOException { |
| driver.withOutputFormat(SequenceFileOutputFormat.class, |
| SequenceFileInputFormat.class); |
| driver.withInputKey(new Text("a")); |
| driver.withInputValue(new LongWritable(1)).withInputValue( |
| new LongWritable(2)); |
| driver.withOutput(new Text("a"), new LongWritable(3)); |
| driver.runTest(); |
| } |
| |
| @SuppressWarnings({ "unchecked", "rawtypes" }) |
| @Test |
| public void testOutputFormatWithMismatchInOutputClasses() throws IOException { |
| final ReduceDriver driver = ReduceDriver.newReduceDriver(reducer); |
| driver.withOutputFormat(TextOutputFormat.class, TextInputFormat.class); |
| driver.withInputKey(new Text("a")); |
| driver.withInputValue(new LongWritable(1)).withInputValue( |
| new LongWritable(2)); |
| driver.withOutput(new LongWritable(), new Text("a\t3")); |
| driver.runTest(); |
| } |
| |
| @Test |
| public void textMockContext() throws IOException, InterruptedException { |
| thrown.expectMessage(RuntimeException.class, "Injected!"); |
| Reducer<Text, LongWritable, Text, LongWritable>.Context context = driver.getContext(); |
| doThrow(new RuntimeException("Injected!")) |
| .when(context) |
| .write(any(Text.class), any(LongWritable.class)); |
| driver.withInputKey(new Text("a")); |
| driver.withInputValue(new LongWritable(1)).withInputValue( |
| new LongWritable(2)); |
| driver.runTest(); |
| } |
| |
| static class TaskAttemptReducer extends Reducer<Text,NullWritable,Text,NullWritable> { |
| @Override |
| protected void reduce(Text key, Iterable<NullWritable> values, Context context) |
| throws IOException,InterruptedException { |
| context.write(new Text(context.getTaskAttemptID().toString()), NullWritable.get()); |
| } |
| } |
| |
| @Test |
| public void testWithTaskAttemptUse() throws IOException { |
| final ReduceDriver<Text,NullWritable,Text,NullWritable> driver |
| = ReduceDriver.newReduceDriver(new TaskAttemptReducer()); |
| ReduceFeeder<Text, NullWritable> reduceFeeder = new ReduceFeeder<Text, NullWritable>(driver.getConfiguration()); |
| |
| driver.withInput(reduceFeeder.updateInput(new Text("anything"), Arrays.asList(NullWritable.get()))).withOutput( |
| new Text("attempt__0000_r_000000_0"), NullWritable.get()).runTest(); |
| } |
| } |
