@Test
public void testNbrOfVerticesTwoVertices() {
Graph<String, Integer> g = new DiGraph<String, Integer>();
g.addVertex("a");
g.addVertex("b");
assertEquals(2, GraphUtilities.nbrOfVertices(g));
}
@Test
public void testNbrOfVerticesFiveVertices() {
Graph<String, Integer> g = new DiGraph<String, Integer>();
Graph.Vertex<String, Integer> v1 = g.addVertex("a");
Graph.Vertex<String, Integer> v2 = g.addVertex("b");
Graph.Vertex<String, Integer> v3 = g.addVertex("c");
Graph.Vertex<String, Integer> v4 = g.addVertex("d");
Graph.Vertex<String, Integer> v5 = g.addVertex("e");
g.addEdge(1, v1, v2);
g.addEdge(4, v2, v3);
g.addEdge(3, v3, v4);
g.addEdge(7, v4, v5);
g.addEdge(2, v5, v1);
assertEquals(5, GraphUtilities.nbrOfVertices(g));
}
@Test
public void testNbrOfVerticesNoVertices() {
Graph<String, Integer> g = new DiGraph<String, Integer>();
assertEquals(0, GraphUtilities.nbrOfVertices(g));
}