@Test
public void testConnectNodes() {
graph.connectNodes('A', 'F', -1); // negative cost
graph.connectNodes('A', 'B', 1); // Already connected
graph.connectNodes('G', 'D', 2); // already connected
graph.connectNodes('H', 'A', 3); // H doesn't exists
graph.connectNodes('D', 'H', 4); // H doesn't exists
assertEquals(ORIGINAL_NUMBER_OF_NODES, graph.getNumberOfNodes());
assertEquals(ORIGINAL_NUMBER_OF_EDGES, graph.getNumberOfEdges());
assertEquals(ORIGINAL_EDGE_WEIGHT, graph.getTotalEdgeWeight());
assertFalse(graph.edgeExistsBetween('A', 'F'));
assertTrue(graph.edgeExistsBetween('B', 'A'));
assertTrue(graph.edgeExistsBetween('D', 'G'));
assertFalse(graph.edgeExistsBetween('A', 'H'));
assertFalse(graph.edgeExistsBetween('H', 'D'));
graph.connectNodes('E', 'A', 9);
assertEquals(ORIGINAL_NUMBER_OF_NODES, graph.getNumberOfNodes());
assertEquals(ORIGINAL_NUMBER_OF_EDGES + 1, graph.getNumberOfEdges());
assertEquals(ORIGINAL_EDGE_WEIGHT + 9, graph.getTotalEdgeWeight());
assertTrue(graph.edgeExistsBetween('A', 'E'));
assertTrue(graph.edgeExistsBetween('E', 'A'));
graph.connectNodes('F', 'E', 11);
assertEquals(ORIGINAL_NUMBER_OF_NODES, graph.getNumberOfNodes());
assertEquals(ORIGINAL_NUMBER_OF_EDGES + 2, graph.getNumberOfEdges());
assertEquals(ORIGINAL_EDGE_WEIGHT + 20, graph.getTotalEdgeWeight());
assertTrue(graph.edgeExistsBetween('F', 'E'));
assertTrue(graph.edgeExistsBetween('E', 'F'));
}
@Test
public void testLoop() {
graph.connectNodes('E', 'E', 2);
assertEquals(ORIGINAL_NUMBER_OF_NODES, graph.getNumberOfNodes());
assertEquals(ORIGINAL_NUMBER_OF_EDGES + 1, graph.getNumberOfEdges());
assertEquals(ORIGINAL_EDGE_WEIGHT + 2, graph.getTotalEdgeWeight());
MiniGraph<Character> tree = graph.generateMinimumSpanningTree();
assertEquals(ORIGINAL_NUMBER_OF_NODES, tree.getNumberOfNodes());
assertEquals(ORIGINAL_NUMBER_OF_NODES - 1, tree.getNumberOfEdges());
assertEquals(16, tree.getTotalEdgeWeight());
}
@Test
public void testEmptyGraph() {
graph = new MyGraph<Character>(); // MyGraph ersätts med namnet på din
// graftyp
graph.connectNodes('A', 'F', 1);
assertEquals(0, graph.getNumberOfNodes());
assertEquals(0, graph.getNumberOfEdges());
assertEquals(0, graph.getTotalEdgeWeight());
MiniGraph<Character> tree = graph.generateMinimumSpanningTree();
assertEquals(0, tree.getNumberOfNodes());
assertEquals(0, tree.getNumberOfEdges());
assertEquals(0, tree.getTotalEdgeWeight());
}
@Before
public void setUp() {
graph.addNode('A');
graph.addNode('B');
graph.addNode('C');
graph.addNode('D');
graph.addNode('E');
graph.addNode('F');
graph.addNode('G');
graph.connectNodes('A', 'B', 2);
graph.connectNodes('A', 'C', 4);
graph.connectNodes('A', 'D', 1);
graph.connectNodes('B', 'D', 3);
graph.connectNodes('B', 'E', 10);
graph.connectNodes('C', 'D', 2);
graph.connectNodes('C', 'F', 5);
graph.connectNodes('D', 'E', 7);
graph.connectNodes('D', 'F', 8);
graph.connectNodes('D', 'G', 4);
graph.connectNodes('E', 'G', 6);
graph.connectNodes('F', 'G', 1);
}