/*
* 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.flink.graph.test.operations;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.graph.Graph;
import org.apache.flink.graph.test.TestGraphUtils;
import org.apache.flink.test.util.MultipleProgramsTestBase;
import org.apache.flink.types.LongValue;
import org.apache.flink.types.NullValue;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import java.util.List;
@RunWith(Parameterized.class)
public class DegreesITCase extends MultipleProgramsTestBase {
public DegreesITCase(TestExecutionMode mode) {
super(mode);
}
private String expectedResult;
@Test
public void testOutDegrees() throws Exception {
/*
* Test outDegrees()
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, Long> graph = Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
TestGraphUtils.getLongLongEdgeData(env), env);
DataSet<Tuple2<Long, LongValue>> data = graph.outDegrees();
List<Tuple2<Long, LongValue>> result = data.collect();
expectedResult = "1,2\n" +
"2,1\n" +
"3,2\n" +
"4,1\n" +
"5,1\n";
compareResultAsTuples(result, expectedResult);
}
@Test
public void testOutDegreesWithNoOutEdges() throws Exception {
/*
* Test outDegrees() no outgoing edges
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, Long> graph = Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
TestGraphUtils.getLongLongEdgeDataWithZeroDegree(env), env);
DataSet<Tuple2<Long, LongValue>> data = graph.outDegrees();
List<Tuple2<Long, LongValue>> result = data.collect();
expectedResult = "1,3\n" +
"2,1\n" +
"3,1\n" +
"4,1\n" +
"5,0\n";
compareResultAsTuples(result, expectedResult);
}
@Test
public void testInDegrees() throws Exception {
/*
* Test inDegrees()
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, Long> graph = Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
TestGraphUtils.getLongLongEdgeData(env), env);
DataSet<Tuple2<Long, LongValue>> data = graph.inDegrees();
List<Tuple2<Long, LongValue>> result = data.collect();
expectedResult = "1,1\n" +
"2,1\n" +
"3,2\n" +
"4,1\n" +
"5,2\n";
compareResultAsTuples(result, expectedResult);
}
@Test
public void testInDegreesWithNoInEdge() throws Exception {
/*
* Test inDegrees() no ingoing edge
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, Long> graph = Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
TestGraphUtils.getLongLongEdgeDataWithZeroDegree(env), env);
DataSet<Tuple2<Long, LongValue>> data = graph.inDegrees();
List<Tuple2<Long, LongValue>> result = data.collect();
expectedResult = "1,0\n" +
"2,1\n" +
"3,1\n" +
"4,1\n" +
"5,3\n";
compareResultAsTuples(result, expectedResult);
}
@Test
public void testGetDegrees() throws Exception {
/*
* Test getDegrees()
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, Long> graph = Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
TestGraphUtils.getLongLongEdgeData(env), env);
DataSet<Tuple2<Long, LongValue>> data = graph.getDegrees();
List<Tuple2<Long, LongValue>> result = data.collect();
expectedResult = "1,3\n" +
"2,2\n" +
"3,4\n" +
"4,2\n" +
"5,3\n";
compareResultAsTuples(result, expectedResult);
}
@Test
public void testGetDegreesWithDisconnectedData() throws Exception {
/*
* Test getDegrees() with disconnected data
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, NullValue, Long> graph =
Graph.fromDataSet(TestGraphUtils.getDisconnectedLongLongEdgeData(env), env);
DataSet<Tuple2<Long, LongValue>> data = graph.outDegrees();
List<Tuple2<Long, LongValue>> result = data.collect();
expectedResult = "1,2\n" +
"2,1\n" +
"3,0\n" +
"4,1\n" +
"5,0\n";
compareResultAsTuples(result, expectedResult);
}
}