public void SetUp() { this.dataSource = new NullableAndNonNullableRelationDataSet(); this.graph = DataGraph.Create(dataSource); this.edgePredictate = new DataTableSortAlgorithm.NonNullableDataRelationEdgePredicate(); this.fgraph = new FilteredEdgeListGraph(this.graph, this.edgePredictate ); }