public void DFSFunc_NotEqualGraphs_ReturnsAllGraphsNodes() { //Graph init var graph = new Graph(); var nodeOne = new Node("One"); var nodeTwo = new Node("Two"); var nodeThree = new Node("Three"); var nodeFour = new Node("Four"); var nodeFive = new Node("Five"); var nodeSix = new Node("Six"); //Extra node graph.AddConnection(new Edge(nodeOne, nodeTwo)); graph.AddConnection(new Edge(nodeOne, nodeThree)); graph.AddConnection(new Edge(nodeTwo, nodeThree)); graph.AddConnection(new Edge(nodeTwo, nodeFour)); graph.AddConnection(new Edge(nodeThree, nodeFive)); graph.AddConnection(new Edge(nodeFour, nodeFive)); //Check collection init var graphsNodes = new HashSet <Node>(); graphsNodes.Add(nodeOne); graphsNodes.Add(nodeTwo); graphsNodes.Add(nodeThree); graphsNodes.Add(nodeFour); graphsNodes.Add(nodeFive); graphsNodes.Add(nodeSix); //Adding extra node //DFS check HashSet <Node> dfsResult = DFS.DFSFunc(graph, nodeOne); //Assert Assert.AreEqual(false, HashSet <Node> .CreateSetComparer().Equals(dfsResult, graphsNodes)); }