}
public void testEmptyGraph(int numVertices) {
SparseGraphStruct tester = new SparseGraphStruct(numVertices);
assertEquals("Num edges", 0, tester.numEdges());
assertEquals("Num vertices", numVertices, tester.numVertices());
}
public void testSmallGraph() {
ArrayList<Integer> source = new ArrayList<Integer>(Arrays.asList(0, 0, 0,
2, 3));