/*
* 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.library;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.graph.Graph;
import org.apache.flink.graph.Vertex;
import org.apache.flink.graph.examples.data.LabelPropagationData;
import org.apache.flink.test.util.MultipleProgramsTestBase;
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 LabelPropagationITCase extends MultipleProgramsTestBase {
public LabelPropagationITCase(TestExecutionMode mode) {
super(mode);
}
private String expectedResult;
@Test
public void testSingleIteration() throws Exception {
/*
* Test one iteration of label propagation example with a simple graph
*/
ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, NullValue> inputGraph = Graph.fromDataSet(
LabelPropagationData.getDefaultVertexSet(env),
LabelPropagationData.getDefaultEdgeDataSet(env), env);
List<Vertex<Long, Long>> result = inputGraph
.run(new LabelPropagation<Long, Long, NullValue>(1))
.collect();
expectedResult = LabelPropagationData.LABELS_AFTER_1_ITERATION;
compareResultAsTuples(result, expectedResult);
}
@Test
public void testTieBreaker() throws Exception {
/*
* Test the label propagation example where a tie must be broken
*/
ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, NullValue> inputGraph = Graph.fromDataSet(
LabelPropagationData.getTieVertexSet(env),
LabelPropagationData.getTieEdgeDataSet(env), env);
List<Vertex<Long, Long>> result = inputGraph
.run(new LabelPropagation<Long, Long, NullValue>(1))
.collect();
expectedResult = LabelPropagationData.LABELS_WITH_TIE;
compareResultAsTuples(result, expectedResult);
}
}