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[Code Coverage]
transforms/gcn_norm.py (#6673)
Co-authored-by: wsad1 <jinu.sunil@gmail.com> Co-authored-by: rusty1s <matthias.fey@tu-dortmund.de>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| import torch | ||
| from torch_sparse import SparseTensor | ||
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| from torch_geometric.data import Data | ||
| from torch_geometric.transforms import GCNNorm | ||
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| def test_gcn_norm(): | ||
| edge_index = torch.tensor([[0, 1, 1, 2], [1, 0, 2, 1]]) | ||
| edge_weight = torch.ones(edge_index.size(1)) | ||
| adj_t = SparseTensor.from_edge_index(edge_index, edge_weight).t() | ||
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| transform = GCNNorm() | ||
| assert str(transform) == 'GCNNorm(add_self_loops=True)' | ||
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| expected_edge_index = [[0, 1, 1, 2, 0, 1, 2], [1, 0, 2, 1, 0, 1, 2]] | ||
| expected_edge_weight = torch.tensor( | ||
| [0.4082, 0.4082, 0.4082, 0.4082, 0.5000, 0.3333, 0.5000]) | ||
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| data = Data(edge_index=edge_index, edge_weight=edge_weight, num_nodes=3) | ||
| data = transform(data) | ||
| assert len(data) == 3 | ||
| assert data.num_nodes == 3 | ||
| assert data.edge_index.tolist() == expected_edge_index | ||
| assert torch.allclose(data.edge_weight, expected_edge_weight, atol=1e-4) | ||
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| data = Data(edge_index=edge_index, num_nodes=3) | ||
| data = transform(data) | ||
| assert len(data) == 3 | ||
| assert data.num_nodes == 3 | ||
| assert data.edge_index.tolist() == expected_edge_index | ||
| assert torch.allclose(data.edge_weight, expected_edge_weight, atol=1e-4) | ||
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| # For `SparseTensor`, expected outputs will be sorted: | ||
| expected_edge_index = [[0, 0, 1, 1, 1, 2, 2], [0, 1, 0, 1, 2, 1, 2]] | ||
| expected_edge_weight = torch.tensor( | ||
| [0.500, 0.4082, 0.4082, 0.3333, 0.4082, 0.4082, 0.5000]) | ||
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| data = Data(adj_t=adj_t) | ||
| data = transform(data) | ||
| assert len(data) == 1 | ||
| row, col, value = data.adj_t.coo() | ||
| assert row.tolist() == expected_edge_index[0] | ||
| assert col.tolist() == expected_edge_index[1] | ||
| assert torch.allclose(value, expected_edge_weight, atol=1e-4) |
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