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/*
* 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 org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link ImmutableGraph} and {@link ImmutableGraph.Builder} that are not ready covered by
* {@link StandardImmutableDirectedGraphTest}.
*/
@RunWith(JUnit4.class)
public class StandardImmutableGraphAdditionalTest {
@Test
public void immutableGraph() {
MutableGraph<String> mutableGraph = GraphBuilder.directed().build();
mutableGraph.addNode("A");
ImmutableGraph<String> immutableGraph = ImmutableGraph.copyOf(mutableGraph);
assertThat(immutableGraph).isNotInstanceOf(MutableValueGraph.class);
assertThat(immutableGraph).isEqualTo(mutableGraph);
mutableGraph.addNode("B");
assertThat(immutableGraph).isNotEqualTo(mutableGraph);
}
@Test
public void copyOfImmutableGraph_optimized() {
Graph<String> graph1 = ImmutableGraph.copyOf(GraphBuilder.directed().<String>build());
Graph<String> graph2 = ImmutableGraph.copyOf(graph1);
assertThat(graph2).isSameInstanceAs(graph1);
}
@Test
public void immutableGraphBuilder_appliesGraphBuilderConfig() {
ImmutableGraph<String> emptyGraph =
GraphBuilder.directed()
.allowsSelfLoops(true)
.nodeOrder(ElementOrder.<String>natural())
.immutable()
.build();
assertThat(emptyGraph.isDirected()).isTrue();
assertThat(emptyGraph.allowsSelfLoops()).isTrue();
assertThat(emptyGraph.nodeOrder()).isEqualTo(ElementOrder.<String>natural());
}
/**
* Tests that the ImmutableGraph.Builder doesn't change when the creating GraphBuilder changes.
*/
@Test
@SuppressWarnings("CheckReturnValue")
public void immutableGraphBuilder_copiesGraphBuilder() {
GraphBuilder<String> graphBuilder =
GraphBuilder.directed()
.allowsSelfLoops(true)
.<String>nodeOrder(ElementOrder.<String>natural());
ImmutableGraph.Builder<String> immutableGraphBuilder = graphBuilder.immutable();
// Update GraphBuilder, but this shouldn't impact immutableGraphBuilder
graphBuilder.allowsSelfLoops(false).nodeOrder(ElementOrder.<String>unordered());
ImmutableGraph<String> emptyGraph = immutableGraphBuilder.build();
assertThat(emptyGraph.isDirected()).isTrue();
assertThat(emptyGraph.allowsSelfLoops()).isTrue();
assertThat(emptyGraph.nodeOrder()).isEqualTo(ElementOrder.<String>natural());
}
@Test
public void copyOf_incidentEdgeOrder() {
ImmutableGraph<Object> graph = ImmutableGraph.copyOf(GraphBuilder.undirected().build());
assertThat(graph.incidentEdgeOrder()).isEqualTo(ElementOrder.stable());
}
@Test
public void copyOf_fromUnorderedGraph_incidentEdgeOrder() {
ImmutableGraph<Object> graph =
ImmutableGraph.copyOf(
GraphBuilder.undirected().incidentEdgeOrder(ElementOrder.unordered()).build());
assertThat(graph.incidentEdgeOrder()).isEqualTo(ElementOrder.stable());
}
@Test
public void immutableGraphBuilder_addNode() {
ImmutableGraph<String> graph = GraphBuilder.directed().<String>immutable().addNode("A").build();
assertThat(graph.nodes()).containsExactly("A");
assertThat(graph.edges()).isEmpty();
}
@Test
public void immutableGraphBuilder_putEdgeFromNodes() {
ImmutableGraph<String> graph =
GraphBuilder.directed().<String>immutable().putEdge("A", "B").build();
assertThat(graph.nodes()).containsExactly("A", "B");
assertThat(graph.edges()).containsExactly(EndpointPair.ordered("A", "B"));
}
@Test
public void immutableGraphBuilder_putEdgeFromEndpointPair() {
ImmutableGraph<String> graph =
GraphBuilder.directed().<String>immutable().putEdge(EndpointPair.ordered("A", "B")).build();
assertThat(graph.nodes()).containsExactly("A", "B");
assertThat(graph.edges()).containsExactly(EndpointPair.ordered("A", "B"));
}
}
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