()
| 33 | |
| 34 | |
| 35 | def test_edge_subgraph(): |
| 36 | # Test when the graph has no node data and edge data. |
| 37 | g = generate_graph(add_data=False) |
| 38 | eid = [0, 2, 3, 6, 7, 9] |
| 39 | |
| 40 | # relabel=True |
| 41 | sg = g.edge_subgraph(eid) |
| 42 | assert F.array_equal( |
| 43 | sg.ndata[dgl.NID], F.tensor([0, 2, 4, 5, 1, 9], g.idtype) |
| 44 | ) |
| 45 | assert F.array_equal(sg.edata[dgl.EID], F.tensor(eid, g.idtype)) |
| 46 | sg.ndata["h"] = F.arange(0, sg.num_nodes()) |
| 47 | sg.edata["h"] = F.arange(0, sg.num_edges()) |
| 48 | |
| 49 | # relabel=False |
| 50 | sg = g.edge_subgraph(eid, relabel_nodes=False) |
| 51 | assert g.num_nodes() == sg.num_nodes() |
| 52 | assert F.array_equal(sg.edata[dgl.EID], F.tensor(eid, g.idtype)) |
| 53 | sg.ndata["h"] = F.arange(0, sg.num_nodes()) |
| 54 | sg.edata["h"] = F.arange(0, sg.num_edges()) |
| 55 | |
| 56 | |
| 57 | @pytest.mark.parametrize("relabel_nodes", [True, False]) |
no test coverage detected