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Java example source code file (ConfigurableDirectedNetworkTest.java)

This example Java source code file (ConfigurableDirectedNetworkTest.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

adding, configurablesimpledirectednetworktest, e41, illegalargumentexception, mutablenetwork, override, reusing, string, test

The ConfigurableDirectedNetworkTest.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 static org.junit.Assert.fail;

import com.google.common.collect.ImmutableSet;

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

/**
 * Tests for a directed {@link ConfigurableMutableNetwork} with default graph properties.
 */
@RunWith(JUnit4.class)
public class ConfigurableDirectedNetworkTest extends ConfigurableSimpleDirectedNetworkTest {

  @Override
  public MutableNetwork<Integer, String> createGraph() {
    return NetworkBuilder.directed().build();
  }

  @Test
  public void edges_selfLoop() {
    addEdge(E11, N1, N1);
    assertThat(graph.edges()).containsExactly(E11);
  }

  @Test
  public void incidentEdges_selfLoop() {
    addEdge(E11, N1, N1);
    assertThat(graph.incidentEdges(N1)).containsExactly(E11);
  }

  @Test
  public void incidentNodes_selfLoop() {
    addEdge(E11, N1, N1);
    assertThat(graph.incidentNodes(E11)).containsExactly(N1, N1);
  }

  @Test
  public void adjacentNodes_selfLoop() {
    addEdge(E11, N1, N1);
    addEdge(E12, N1, N2);
    assertThat(graph.adjacentNodes(N1)).containsExactly(N1, N2);
  }

  @Test
  public void adjacentEdges_selfLoop() {
    // An edge is never adjacent to itself
    addEdge(E11, N1, N1);
    assertThat(graph.adjacentEdges(E11)).isEmpty();
    addEdge(E12, N1, N2);
    assertThat(graph.adjacentEdges(E11)).containsExactly(E12);
  }

  @Test
  public void edgesConnecting_selfLoop() {
    addEdge(E11, N1, N1);
    assertThat(graph.edgesConnecting(N1, N1)).containsExactly(E11);
    addEdge(E12, N1, N2);
    assertThat(graph.edgesConnecting(N1, N2)).containsExactly(E12);
    assertThat(graph.edgesConnecting(N1, N1)).containsExactly(E11);
  }

  @Test
  public void inEdges_selfLoop() {
    addEdge(E11, N1, N1);
    assertThat(graph.inEdges(N1)).containsExactly(E11);
    addEdge(E41, N4, N1);
    assertThat(graph.inEdges(N1)).containsExactly(E11, E41);
  }

  @Test
  public void outEdges_selfLoop() {
    addEdge(E11, N1, N1);
    assertThat(graph.outEdges(N1)).containsExactly(E11);
    addEdge(E12, N1, N2);
    assertThat(graph.outEdges(N1)).containsExactly(E11, E12);
  }

  @Test
  public void predecessors_selfLoop() {
    addEdge(E11, N1, N1);
    assertThat(graph.predecessors(N1)).containsExactly(N1);
    addEdge(E41, N4, N1);
    assertThat(graph.predecessors(N1)).containsExactly(N1, N4);
  }

  @Test
  public void successors_selfLoop() {
    addEdge(E11, N1, N1);
    assertThat(graph.successors(N1)).containsExactly(N1);
    addEdge(E12, N1, N2);
    assertThat(graph.successors(N1)).containsExactly(N1, N2);
  }

  @Test
  public void degree_selfLoop() {
    addEdge(E11, N1, N1);
    assertEquals(1, graph.degree(N1));
    addEdge(E12, N1, N2);
    assertEquals(2, graph.degree(N1));
  }

  @Test
  public void inDegree_selfLoop() {
    addEdge(E11, N1, N1);
    assertEquals(1, graph.inDegree(N1));
    addEdge(E41, N4, N1);
    assertEquals(2, graph.inDegree(N1));
  }

  @Test
  public void outDegree_selfLoop() {
    addEdge(E11, N1, N1);
    assertEquals(1, graph.outDegree(N1));
    addEdge(E12, N1, N2);
    assertEquals(2, graph.outDegree(N1));
  }

  @Test
  public void source_selfLoop() {
    addEdge(E11, N1, N1);
    assertEquals(N1, graph.incidentNodes(E11).source());
  }

  @Test
  public void target_selfLoop() {
    addEdge(E11, N1, N1);
    assertEquals(N1, graph.incidentNodes(E11).target());
  }

  @Override
  @Test
  public void addEdge_selfLoop() {
    assertTrue(addEdge(E11, N1, N1));
    assertThat(graph.edges()).contains(E11);
    assertThat(graph.edgesConnecting(N1, N1)).containsExactly(E11);
  }

  @Test
  public void addEdge_existingSelfLoopEdgeBetweenSameNodes() {
    addEdge(E11, N1, N1);
    ImmutableSet<String> edges = ImmutableSet.copyOf(graph.edges());
    assertFalse(addEdge(E11, N1, N1));
    assertThat(graph.edges()).containsExactlyElementsIn(edges);
  }

  @Test
  public void addEdge_existingEdgeBetweenDifferentNodes_selfLoops() {
    addEdge(E11, N1, N1);
    try {
      addEdge(E11, N1, N2);
      fail("Reusing an existing self-loop edge to connect different nodes succeeded");
    } catch (IllegalArgumentException e) {
      assertThat(e.getMessage()).contains(ERROR_REUSE_EDGE);
    }
    try {
      addEdge(E11, N2, N2);
      fail("Reusing an existing self-loop edge to make a different self-loop edge succeeded");
    } catch (IllegalArgumentException e) {
      assertThat(e.getMessage()).contains(ERROR_REUSE_EDGE);
    }
    addEdge(E12, N1, N2);
    try {
      addEdge(E12, N1, N1);
      fail("Reusing an existing edge to add a self-loop edge between different nodes succeeded");
    } catch (IllegalArgumentException e) {
      assertThat(e.getMessage()).contains(ERROR_REUSE_EDGE);
    }
  }

  @Test
  public void addEdge_parallelSelfLoopEdge() {
    addEdge(E11, N1, N1);
    try {
      addEdge(EDGE_NOT_IN_GRAPH, N1, N1);
      fail("Adding a parallel self-loop edge succeeded");
    } catch (IllegalArgumentException e) {
      assertThat(e.getMessage()).contains(ERROR_PARALLEL_EDGE);
    }
  }

  @Test
  public void removeNode_existingNodeWithSelfLoopEdge() {
    addNode(N1);
    addEdge(E11, N1, N1);
    assertTrue(graph.removeNode(N1));
    assertThat(graph.nodes()).isEmpty();
    assertThat(graph.edges()).doesNotContain(E11);
  }

  @Test
  public void removeEdge_existingSelfLoopEdge() {
    addEdge(E11, N1, N1);
    assertTrue(graph.removeEdge(E11));
    assertThat(graph.edges()).doesNotContain(E11);
    assertThat(graph.edgesConnecting(N1, N1)).isEmpty();
  }
}

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