/*
* 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.clustering.undirected;
import org.apache.commons.math3.util.CombinatoricsUtils;
import org.apache.flink.graph.asm.AsmTestBase;
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 TriangleCountTest
extends AsmTestBase {
@Test
public void testWithSimpleGraph()
throws Exception {
long triangleCount = new TriangleCount<IntValue, NullValue, NullValue>()
.run(undirectedSimpleGraph)
.execute();
assertEquals(2, triangleCount);
}
@Test
public void testWithCompleteGraph()
throws Exception {
long expectedDegree = completeGraphVertexCount - 1;
long expectedCount = completeGraphVertexCount * CombinatoricsUtils.binomialCoefficient((int)expectedDegree, 2) / 3;
long triangleCount = new TriangleCount<LongValue, NullValue, NullValue>()
.run(completeGraph)
.execute();
assertEquals(expectedCount, triangleCount);
}
@Test
public void testWithEmptyGraph()
throws Exception {
long triangleCount = new TriangleCount<LongValue, NullValue, NullValue>()
.run(emptyGraph)
.execute();
assertEquals(0, triangleCount);
}
@Test
public void testWithRMatGraph()
throws Exception {
long triangleCount = new TriangleCount<LongValue, NullValue, NullValue>()
.run(undirectedRMatGraph)
.execute();
assertEquals(75049, triangleCount);
}
}