| /* |
| * 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.giraph.edge; |
| |
| import com.google.common.collect.Lists; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.NullWritable; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import static org.apache.giraph.graph.TestVertexAndEdges.instantiateOutEdges; |
| import static org.junit.Assert.assertEquals; |
| |
| /** |
| * Tests {@link OutEdges} implementations with null edge values. |
| */ |
| public class TestNullValueEdges { |
| /** {@link OutEdges} classes to be tested. */ |
| private Collection<Class<? extends MutableOutEdges>> |
| edgesClasses = Lists.newArrayList(); |
| |
| @Before |
| public void setUp() { |
| edgesClasses.add(LongNullArrayEdges.class); |
| edgesClasses.add(LongNullHashSetEdges.class); |
| } |
| |
| @Test |
| public void testEdges() { |
| for (Class<? extends OutEdges> edgesClass : edgesClasses) { |
| testEdgesClass(edgesClass); |
| } |
| } |
| |
| private void testEdgesClass( |
| Class<? extends OutEdges> edgesClass) { |
| OutEdges<LongWritable, NullWritable> edges = |
| (OutEdges<LongWritable, NullWritable>) |
| instantiateOutEdges(edgesClass); |
| |
| List<Edge<LongWritable, NullWritable>> initialEdges = Lists.newArrayList( |
| EdgeFactory.create(new LongWritable(1)), |
| EdgeFactory.create(new LongWritable(2)), |
| EdgeFactory.create(new LongWritable(3))); |
| |
| edges.initialize(initialEdges); |
| assertEquals(3, edges.size()); |
| |
| edges.add(EdgeFactory.createReusable(new LongWritable(4))); |
| assertEquals(4, edges.size()); |
| |
| edges.remove(new LongWritable(2)); |
| assertEquals(3, edges.size()); |
| } |
| |
| /** |
| * Test in-place edge mutations via the iterable returned by {@link |
| * org.apache.giraph.graph.Vertex#getMutableEdges()}. |
| */ |
| @Test |
| public void testMutateEdges() { |
| for (Class<? extends MutableOutEdges> edgesClass : edgesClasses) { |
| testMutateEdgesClass(edgesClass); |
| } |
| } |
| |
| private void testMutateEdgesClass( |
| Class<? extends MutableOutEdges> edgesClass) { |
| MutableOutEdges<LongWritable, NullWritable> edges = |
| (MutableOutEdges<LongWritable, NullWritable>) |
| instantiateOutEdges(edgesClass); |
| |
| edges.initialize(); |
| |
| // Add 10 edges with id i, for i = 0..9 |
| for (int i = 0; i < 10; ++i) { |
| edges.add(EdgeFactory.create(new LongWritable(i))); |
| } |
| |
| // Use the mutable iterator to remove edges with even id |
| Iterator<MutableEdge<LongWritable, NullWritable>> edgeIt = |
| edges.mutableIterator(); |
| while (edgeIt.hasNext()) { |
| if (edgeIt.next().getTargetVertexId().get() % 2 == 0) { |
| edgeIt.remove(); |
| } |
| } |
| |
| // We should now have 5 edges |
| assertEquals(5, edges.size()); |
| // The edge ids should be all odd |
| for (Edge<LongWritable, NullWritable> edge : edges) { |
| assertEquals(1, edge.getTargetVertexId().get() % 2); |
| } |
| } |
| } |