/*
* 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.geode.distributed.internal.deadlock;
import static org.junit.Assert.*;
import java.util.HashSet;
import java.util.Set;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.apache.geode.test.junit.categories.UnitTest;
@Category(UnitTest.class)
public class DependencyGraphJUnitTest {
@Test
public void testFindCycle() {
DependencyGraph graph = new DependencyGraph();
graph.addEdge(new Dependency("A", "B"));
graph.addEdge(new Dependency("A", "F"));
graph.addEdge(new Dependency("B", "C"));
graph.addEdge(new Dependency("B", "D"));
graph.addEdge(new Dependency("B", "E"));
graph.addEdge(new Dependency("E", "A"));
Set expected = new HashSet();
expected.add(new Dependency("A", "B"));
expected.add(new Dependency("B", "E"));
expected.add(new Dependency("E", "A"));
assertEquals(expected, new HashSet(graph.findCycle()));
}
@Test
public void testSubGraph() {
DependencyGraph graph = new DependencyGraph();
graph.addEdge(new Dependency("A", "B"));
graph.addEdge(new Dependency("B", "C"));
graph.addEdge(new Dependency("C", "A"));
graph.addEdge(new Dependency("E", "F"));
graph.addEdge(new Dependency("F", "G"));
DependencyGraph sub1 = graph.getSubGraph("B");
Set expected = new HashSet();
expected.add(new Dependency("A", "B"));
expected.add(new Dependency("B", "C"));
expected.add(new Dependency("C", "A"));
assertEquals(expected, new HashSet(sub1.findCycle()));
assertEquals(expected, new HashSet(sub1.getEdges()));
DependencyGraph sub2 = graph.getSubGraph("E");
assertEquals(null, sub2.findCycle());
}
@Test
public void testTwoPaths() {
DependencyGraph graph = new DependencyGraph();
graph.addEdge(new Dependency("A", "B"));
graph.addEdge(new Dependency("A", "C"));
graph.addEdge(new Dependency("B", "D"));
graph.addEdge(new Dependency("C", "D"));
assertEquals(null, graph.findCycle());
}
@Test
public void testEmptySet() {
DependencyGraph graph = new DependencyGraph();
assertEquals(null, graph.findCycle());
}
}