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/*
* Copyright 2014 Open Networking Laboratory
*
* Licensed 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.onlab.graph;
import org.junit.Test;
import java.util.Set;
import static com.google.common.collect.ImmutableSet.of;
import static org.junit.Assert.assertEquals;
//import static org.junit.Assert.assertTrue;
/**
* Test of the Suurballe backup path algorithm.
*/
public class SuurballeGraphSearchTest extends BreadthFirstSearchTest {
@Override
protected AbstractGraphPathSearch<TestVertex, TestEdge> graphSearch() {
return new SuurballeGraphSearch<>();
}
public void setWeights() {
weight = new EdgeWeight<TestVertex, TestEdge>() {
@Override
public double weight(TestEdge edge) {
return edge.weight();
}
};
}
public void setDefaultWeights() {
weight = null;
}
@Override
public void defaultGraphTest() {
}
@Override
public void defaultHopCountWeight() {
}
@Test
public void basicGraphTest() {
setDefaultWeights();
Graph<TestVertex, TestEdge> graph = new AdjacencyListsGraph<>(of(A, B, C, D),
of(new TestEdge(A, B, 1),
new TestEdge(B, C, 1),
new TestEdge(A, D, 1),
new TestEdge(D, C, 1)));
executeSearch(graphSearch(), graph, A, C, weight, 1, 4.0);
}
@Test
public void multiplePathOnePairGraphTest() {
setWeights();
Graph<TestVertex, TestEdge> graph = new AdjacencyListsGraph<>(of(A, B, C, D, E),
of(new TestEdge(A, B, 1),
new TestEdge(B, C, 1),
new TestEdge(A, D, 1),
new TestEdge(D, C, 1),
new TestEdge(B, E, 2),
new TestEdge(C, E, 1)));
executeSearch(graphSearch(), graph, A, E, weight, 1, 6.0);
}
@Test
public void multiplePathsMultiplePairs() {
setWeights();
Graph<TestVertex, TestEdge> graph = new AdjacencyListsGraph<>(of(A, B, C, D, E),
of(new TestEdge(A, B, 1),
new TestEdge(B, E, 1),
new TestEdge(A, C, 1),
new TestEdge(C, E, 1),
new TestEdge(A, D, 1),
new TestEdge(D, E, 1),
new TestEdge(A, E, 2)));
GraphPathSearch.Result<TestVertex, TestEdge> result =
graphSearch().search(graph, A, E, weight, GraphPathSearch.ALL_PATHS);
Set<Path<TestVertex, TestEdge>> paths = result.paths();
System.out.println("\n\n" + paths + "\n\n\ndone\n");
assertEquals("incorrect paths count", 3, paths.size());
DisjointPathPair<TestVertex, TestEdge> dpp = (DisjointPathPair<TestVertex, TestEdge>) paths.iterator().next();
assertEquals("incorrect disjoint paths per path", 2, dpp.size());
}
@Test
public void differingPrimaryAndBackupPathLengths() {
setWeights();
Graph<TestVertex, TestEdge> graph = new AdjacencyListsGraph<>(of(A, B, C, D, E),
of(new TestEdge(A, B, 1),
new TestEdge(B, C, 1),
new TestEdge(A, D, 1),
new TestEdge(D, C, 1),
new TestEdge(B, E, 1),
new TestEdge(C, E, 1)));
executeSearch(graphSearch(), graph, A, E, weight, 1, 5.0);
}
@Test
public void onePath() {
setWeights();
Graph<TestVertex, TestEdge> graph = new AdjacencyListsGraph<>(of(A, B, C, D),
of(new TestEdge(A, B, 1),
new TestEdge(B, C, 1),
new TestEdge(A, C, 4),
new TestEdge(C, D, 1)));
GraphPathSearch.Result<TestVertex, TestEdge> result =
graphSearch().search(graph, A, D, weight, GraphPathSearch.ALL_PATHS);
Set<Path<TestVertex, TestEdge>> paths = result.paths();
assertEquals("incorrect paths count", 1, paths.size());
DisjointPathPair<TestVertex, TestEdge> dpp = (DisjointPathPair<TestVertex, TestEdge>) paths.iterator().next();
assertEquals("incorrect disjoint paths count", 1, dpp.size());
}
@Test
public void noPath() {
setWeights();
Graph<TestVertex, TestEdge> graph = new AdjacencyListsGraph<>(of(A, B, C, D),
of(new TestEdge(A, B, 1),
new TestEdge(B, C, 1),
new TestEdge(A, C, 4)));
GraphPathSearch.Result<TestVertex, TestEdge> result =
graphSearch().search(graph, A, D, weight, GraphPathSearch.ALL_PATHS);
Set<Path<TestVertex, TestEdge>> paths = result.paths();
assertEquals("incorrect paths count", paths.size(), 0);
}
@Test
public void disconnected() {
setWeights();
Graph<TestVertex, TestEdge> graph = new AdjacencyListsGraph<>(of(A, B, C, D),
of());
GraphPathSearch.Result<TestVertex, TestEdge> result =
graphSearch().search(graph, A, D, weight, GraphPathSearch.ALL_PATHS);
Set<Path<TestVertex, TestEdge>> paths = result.paths();
assertEquals("incorrect paths count", 0, paths.size());
}
}
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