EdgeDegreePairTest.java example

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 * 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
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package org.apache.flink.graph.asm.degree.annotate.undirected;

import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.tuple.Tuple3;
import org.apache.flink.graph.Edge;
import org.apache.flink.graph.asm.AsmTestBase;
import org.apache.flink.graph.asm.dataset.ChecksumHashCode;
import org.apache.flink.graph.asm.dataset.ChecksumHashCode.Checksum;
import org.apache.flink.test.util.TestBaseUtils;
import org.apache.flink.types.IntValue;
import org.apache.flink.types.LongValue;
import org.apache.flink.types.NullValue;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class EdgeDegreePairTest
extends AsmTestBase {

	@Test
	public void testWithSimpleGraph()
			throws Exception {
		String expectedResult =
			"(0,1,((null),2,3))\n" +
			"(0,2,((null),2,3))\n" +
			"(1,0,((null),3,2))\n" +
			"(1,2,((null),3,3))\n" +
			"(1,3,((null),3,4))\n" +
			"(2,0,((null),3,2))\n" +
			"(2,1,((null),3,3))\n" +
			"(2,3,((null),3,4))\n" +
			"(3,1,((null),4,3))\n" +
			"(3,2,((null),4,3))\n" +
			"(3,4,((null),4,1))\n" +
			"(3,5,((null),4,1))\n" +
			"(4,3,((null),1,4))\n" +
			"(5,3,((null),1,4))";

		DataSet<Edge<IntValue, Tuple3<NullValue, LongValue, LongValue>>> degreePairOnSourceId = undirectedSimpleGraph
			.run(new EdgeDegreePair<IntValue, NullValue, NullValue>());

		TestBaseUtils.compareResultAsText(degreePairOnSourceId.collect(), expectedResult);

		DataSet<Edge<IntValue, Tuple3<NullValue, LongValue, LongValue>>> degreePairOnTargetId = undirectedSimpleGraph
			.run(new EdgeDegreePair<IntValue, NullValue, NullValue>()
				.setReduceOnTargetId(true));

		TestBaseUtils.compareResultAsText(degreePairOnTargetId.collect(), expectedResult);
	}

	@Test
	public void testWithRMatGraph()
			throws Exception {
		DataSet<Edge<LongValue, Tuple3<NullValue, LongValue, LongValue>>> degreePairOnSourceId = undirectedRMatGraph(10, 16)
			.run(new EdgeDegreePair<LongValue, NullValue, NullValue>());

		Checksum checksumOnSourceId = new ChecksumHashCode<Edge<LongValue, Tuple3<NullValue, LongValue, LongValue>>>()
			.run(degreePairOnSourceId)
			.execute();

		assertEquals(20884, checksumOnSourceId.getCount());
		assertEquals(0x00000001e051efe4L, checksumOnSourceId.getChecksum());

		DataSet<Edge<LongValue, Tuple3<NullValue, LongValue, LongValue>>> degreePairOnTargetId = undirectedRMatGraph(10, 16)
			.run(new EdgeDegreePair<LongValue, NullValue, NullValue>()
				.setReduceOnTargetId(true));

		Checksum checksumOnTargetId = new ChecksumHashCode<Edge<LongValue, Tuple3<NullValue, LongValue, LongValue>>>()
			.run(degreePairOnTargetId)
			.execute();

		assertEquals(checksumOnSourceId, checksumOnTargetId);
	}
}