@Override
@CanIgnoreReturnValue
final boolean addEdge(String e, Integer n1, Integer n2) {
DirectedGraph<Integer, String> oldGraph = Graphs.copyOf(directedGraph);
graph = directedGraph = builder.addEdge(e, n1, n2).build();
return !graph.equals(oldGraph);
}
@Test
public void addGraph_overlap() {
DirectedGraph<Integer, String> graph = Graphs.createDirected(directedGraph.config());
populateInputGraph(graph);
// Add an edge that is in 'graph' (overlap)
builder.addEdge(E12, N1, N2);
builder.addGraph(graph);
assertThat(builder.build()).isEqualTo(graph);
}
@Test
public void addGraph_inconsistentEdges() {
DirectedGraph<Integer, String> graph = Graphs.createDirected(directedGraph.config());
populateInputGraph(graph);
builder.addEdge(E21, N3, N1);
try {
builder.addGraph(graph);
fail(
"Should have rejected a graph whose edge definitions were inconsistent with existing"
+ "builder state");
} catch (IllegalArgumentException expected) {
}
}