Java example source code file (ConfigurableUndirectedGraphTest.java)

This example Java source code file (ConfigurableUndirectedGraphTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

configurablesimpleundirectedgraphtest, configurableundirectedgraphtest, mutablegraph, override, test

The ConfigurableUndirectedGraphTest.java Java example source code

/*
 * Copyright (C) 2014 The Guava Authors
 *
 * 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 com.google.common.graph;

import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Tests for an undirected {@link ConfigurableMutableGraph} with default graph properties.
 */
@RunWith(JUnit4.class)
public class ConfigurableUndirectedGraphTest extends ConfigurableSimpleUndirectedGraphTest {

  @Override
  public MutableGraph<Integer> createGraph() {
    return GraphBuilder.undirected().build();
  }

  @Test
  public void adjacentNodes_selfLoop() {
    addEdge(N1, N1);
    addEdge(N1, N2);
    assertThat(graph.adjacentNodes(N1)).containsExactly(N1, N2);
  }

  @Test
  public void predecessors_selfLoop() {
    addEdge(N1, N1);
    assertThat(graph.predecessors(N1)).containsExactly(N1);
    addEdge(N1, N2);
    assertThat(graph.predecessors(N1)).containsExactly(N1, N2);
  }

  @Test
  public void successors_selfLoop() {
    addEdge(N1, N1);
    assertThat(graph.successors(N1)).containsExactly(N1);
    addEdge(N2, N1);
    assertThat(graph.successors(N1)).containsExactly(N1, N2);
  }

  @Test
  public void degree_selfLoop() {
    addEdge(N1, N1);
    assertEquals(1, graph.degree(N1));
    addEdge(N1, N2);
    assertEquals(2, graph.degree(N1));
  }

  @Test
  public void inDegree_selfLoop() {
    addEdge(N1, N1);
    assertEquals(1, graph.inDegree(N1));
    addEdge(N1, N2);
    assertEquals(2, graph.inDegree(N1));
  }

  @Test
  public void outDegree_selfLoop() {
    addEdge(N1, N1);
    assertEquals(1, graph.outDegree(N1));
    addEdge(N2, N1);
    assertEquals(2, graph.outDegree(N1));
  }

  @Override
  @Test
  public void addEdge_selfLoop() {
    assertTrue(addEdge(N1, N1));
    assertThat(graph.adjacentNodes(N1)).containsExactly(N1);
  }

  @Test
  public void addEdge_existingSelfLoopEdgeBetweenSameNodes() {
    addEdge(N1, N1);
    assertFalse(addEdge(N1, N1));
  }

  @Test
  public void removeNode_existingNodeWithSelfLoopEdge() {
    addNode(N1);
    addEdge(N1, N1);
    assertTrue(graph.removeNode(N1));
    assertThat(graph.nodes()).isEmpty();
  }

  @Test
  public void removeEdge_existingSelfLoopEdge() {
    addEdge(N1, N1);
    assertTrue(graph.removeEdge(N1, N1));
    assertThat(graph.nodes()).containsExactly(N1);
    assertThat(graph.adjacentNodes(N1)).isEmpty();
  }
}