| /* |
| * 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.examples; |
| |
| import org.apache.giraph.conf.GiraphConfiguration; |
| import org.apache.giraph.io.formats.IdWithValueTextOutputFormat; |
| import org.apache.giraph.io.formats.IntIntNullTextInputFormat; |
| import org.apache.giraph.utils.InternalVertexRunner; |
| import org.junit.Test; |
| |
| import com.google.common.collect.Maps; |
| |
| import java.util.Map; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| /** |
| * Test for max computation |
| */ |
| public class MaxComputationTest { |
| @Test |
| public void testMax() throws Exception { |
| String[] graph = { |
| "5 1", |
| "1 5 2", |
| "2 5", |
| }; |
| |
| GiraphConfiguration conf = new GiraphConfiguration(); |
| conf.setComputationClass(MaxComputation.class); |
| conf.setVertexInputFormatClass(IntIntNullTextInputFormat.class); |
| conf.setVertexOutputFormatClass(IdWithValueTextOutputFormat.class); |
| Iterable<String> results = InternalVertexRunner.run(conf, graph); |
| |
| Map<Integer, Integer> values = parseResults(results); |
| assertEquals(3, values.size()); |
| assertEquals(5, (int) values.get(1)); |
| assertEquals(5, (int) values.get(2)); |
| assertEquals(5, (int) values.get(5)); |
| } |
| |
| private static Map<Integer, Integer> parseResults(Iterable<String> results) { |
| Map<Integer, Integer> values = Maps.newHashMap(); |
| for (String line : results) { |
| String[] tokens = line.split("\\s+"); |
| int id = Integer.valueOf(tokens[0]); |
| int value = Integer.valueOf(tokens[1]); |
| values.put(id, value); |
| } |
| return values; |
| } |
| } |