/*
* 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.giraph.io;
import com.google.common.collect.Lists;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.apache.giraph.conf.GiraphConfiguration;
import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
import org.apache.giraph.edge.Edge;
import org.apache.giraph.edge.EdgeFactory;
import org.apache.giraph.graph.Vertex;
import org.apache.giraph.io.formats.AdjacencyListTextVertexOutputFormat;
import org.apache.giraph.utils.NoOpComputation;
import org.apache.hadoop.io.DoubleWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.RecordWriter;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.junit.Before;
import org.junit.Test;
import static org.mockito.Mockito.*;
public class TestAdjacencyListTextVertexOutputFormat extends AdjacencyListTextVertexOutputFormat<Text, DoubleWritable, DoubleWritable> {
/** Test configuration */
private ImmutableClassesGiraphConfiguration<Text,
DoubleWritable, DoubleWritable> conf;
/**
* Dummy class to allow ImmutableClassesGiraphConfiguration to be created.
*/
public static class DummyComputation extends NoOpComputation<Text,
DoubleWritable, DoubleWritable, DoubleWritable> { }
@Before
public void setUp() {
GiraphConfiguration giraphConfiguration = new GiraphConfiguration();
giraphConfiguration.setComputationClass(DummyComputation.class);
conf = new ImmutableClassesGiraphConfiguration<Text,
DoubleWritable, DoubleWritable>(giraphConfiguration);
}
protected AdjacencyListTextVertexWriter createVertexWriter(
final RecordWriter<Text, Text> tw) {
AdjacencyListTextVertexWriter writer = new AdjacencyListTextVertexWriter() {
@Override
protected RecordWriter<Text, Text> createLineRecordWriter(
TaskAttemptContext context) throws IOException, InterruptedException {
return tw;
}
};
return writer;
}
@Test
public void testVertexWithNoEdges() throws IOException, InterruptedException {
TaskAttemptContext tac = mock(TaskAttemptContext.class);
when(tac.getConfiguration()).thenReturn(conf);
Vertex vertex = mock(Vertex.class);
when(vertex.getId()).thenReturn(new Text("The Beautiful South"));
when(vertex.getValue()).thenReturn(new DoubleWritable(32.2d));
// Create empty iterable == no edges
when(vertex.getEdges()).thenReturn(new ArrayList<Text>());
RecordWriter<Text, Text> tw = mock(RecordWriter.class);
AdjacencyListTextVertexWriter writer = createVertexWriter(tw);
writer.setConf(conf);
writer.initialize(tac);
writer.writeVertex(vertex);
Text expected = new Text("The Beautiful South\t32.2");
verify(tw).write(expected, null);
verify(vertex, times(1)).getEdges();
}
@Test
public void testVertexWithEdges() throws IOException, InterruptedException {
TaskAttemptContext tac = mock(TaskAttemptContext.class);
when(tac.getConfiguration()).thenReturn(conf);
Vertex vertex = mock(Vertex.class);
when(vertex.getId()).thenReturn(new Text("San Francisco"));
when(vertex.getValue()).thenReturn(new DoubleWritable(0d));
List<Edge<Text, DoubleWritable>> cities = Lists.newArrayList();
Collections.addAll(cities,
EdgeFactory.create(new Text("Los Angeles"), new DoubleWritable(347.16)),
EdgeFactory.create(new Text("Phoenix"), new DoubleWritable(652.48)));
when(vertex.getEdges()).thenReturn(cities);
RecordWriter<Text, Text> tw = mock(RecordWriter.class);
AdjacencyListTextVertexWriter writer = createVertexWriter(tw);
writer.setConf(conf);
writer.initialize(tac);
writer.writeVertex(vertex);
Text expected = new Text("San Francisco\t0.0\tLos Angeles\t347.16\t" +
"Phoenix\t652.48");
verify(tw).write(expected, null);
verify(vertex, times(1)).getEdges();
}
@Test
public void testWithDifferentDelimiter() throws IOException, InterruptedException {
conf.set(AdjacencyListTextVertexOutputFormat.LINE_TOKENIZE_VALUE, ":::");
TaskAttemptContext tac = mock(TaskAttemptContext.class);
when(tac.getConfiguration()).thenReturn(conf);
Vertex vertex = mock(Vertex.class);
when(vertex.getId()).thenReturn(new Text("San Francisco"));
when(vertex.getValue()).thenReturn(new DoubleWritable(0d));
List<Edge<Text, DoubleWritable>> cities = Lists.newArrayList();
Collections.addAll(cities,
EdgeFactory.create(new Text("Los Angeles"), new DoubleWritable(347.16)),
EdgeFactory.create(new Text("Phoenix"), new DoubleWritable(652.48)));
when(vertex.getEdges()).thenReturn(cities);
RecordWriter<Text, Text> tw = mock(RecordWriter.class);
AdjacencyListTextVertexWriter writer = createVertexWriter(tw);
writer.setConf(conf);
writer.initialize(tac);
writer.writeVertex(vertex);
Text expected = new Text("San Francisco:::0.0:::Los Angeles:::347.16:::" +
"Phoenix:::652.48");
verify(tw).write(expected, null);
verify(vertex, times(1)).getEdges();
}
}