/*
* 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.metric.directed;
import org.apache.commons.math3.util.CombinatoricsUtils;
import org.apache.flink.graph.asm.AsmTestBase;
import org.apache.flink.graph.library.metric.directed.EdgeMetrics.Result;
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 EdgeMetricsTest
extends AsmTestBase {
@Test
public void testWithSimpleGraph()
throws Exception {
Result expectedResult = new Result(2, 6, 1, 3);
Result edgeMetrics = new EdgeMetrics<IntValue, NullValue, NullValue>()
.run(directedSimpleGraph)
.execute();
assertEquals(expectedResult, edgeMetrics);
}
@Test
public void testWithCompleteGraph()
throws Exception {
long expectedDegree = completeGraphVertexCount - 1;
long expectedMaximumTriplets = CombinatoricsUtils.binomialCoefficient((int)expectedDegree, 2);
long expectedTriplets = completeGraphVertexCount * expectedMaximumTriplets;
Result expectedResult = new Result(expectedTriplets / 3, 2 * expectedTriplets / 3,
expectedMaximumTriplets, expectedMaximumTriplets);
Result edgeMetrics = new EdgeMetrics<LongValue, NullValue, NullValue>()
.run(completeGraph)
.execute();
assertEquals(expectedResult, edgeMetrics);
}
@Test
public void testWithEmptyGraph()
throws Exception {
Result expectedResult;
expectedResult = new Result(0, 0, 0, 0);
Result withoutZeroDegreeVertices = new EdgeMetrics<LongValue, NullValue, NullValue>()
.run(emptyGraph)
.execute();
assertEquals(withoutZeroDegreeVertices, expectedResult);
}
@Test
public void testWithRMatGraph()
throws Exception {
Result expectedResult = new Result(107817, 315537, 820, 3822);
Result withoutZeroDegreeVertices = new EdgeMetrics<LongValue, NullValue, NullValue>()
.run(directedRMatGraph(10, 16))
.execute();
assertEquals(expectedResult, withoutZeroDegreeVertices);
}
}