You will see many datasets on the URL: You can apply your implementation on a dataset/graph of your choice though make sure the properties (directed/undirected/weighted/unweighted/connected/not-connected and others) match with the question.
Sample Datasets:
Dataset: karate.edgelist: http://www-personal.umich.edu/~mejn/netdata/karate.zipType: Undirected Graph, Unweighted Graph
Political Blogs: http://www-personal.umich.edu/~mejn/netdata/polblogs.zip