Commit 373fbfd

@@ -35,13 +35,15 @@ Ensure(add_vertex_adds_max_number_of_verticies_to_graph) {
 
 Ensure(add_edge_connects_two_vertices) {
   Graph *graph = graph_initialize();
-  Vertex *a = graph_add_vertex(graph, 'a');
-  Vertex *b = graph_add_vertex(graph, 'b');
 
-  graph_add_edge(graph, a, b);
+  graph_add_edge(
+    graph,
+    graph_add_vertex(graph, 'a'),
+    graph_add_vertex(graph, 'b')
+  );
 
-  assert_that(graph->edges[a->label][b->label], is_equal_to(true));
-  assert_that(graph->edges[b->label][a->label], is_equal_to(false));
+  assert_that(graph->edges['a']['b'], is_equal_to(true));
+  assert_that(graph->edges['b']['a'], is_equal_to(false));
 }
 
 TestSuite *graph_tests() {