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import torch
from torch_geometric.data import Data, HeteroData
from torch_geometric.transforms import ToUndirected
def test_to_undirected():
assert str(ToUndirected()) == 'ToUndirected()'
edge_index = torch.tensor([[2, 0, 2], [3, 1, 0]])
edge_weight = torch.randn(edge_index.size(1))
edge_attr = torch.randn(edge_index.size(1), 8)
perm = torch.tensor([1, 2, 1, 2, 0, 0])
data = Data(edge_index=edge_index, edge_weight=edge_weight,
edge_attr=edge_attr, num_nodes=4)
data = ToUndirected()(data)
assert len(data) == 4
assert data.edge_index.tolist() == [[0, 0, 1, 2, 2, 3], [1, 2, 0, 0, 3, 2]]
assert data.edge_weight.tolist() == edge_weight[perm].tolist()
assert data.edge_attr.tolist() == edge_attr[perm].tolist()
assert data.num_nodes == 4
def test_to_undirected_with_duplicates():
edge_index = torch.tensor([[0, 0, 1, 1], [0, 1, 0, 2]])
edge_weight = torch.ones(4)
data = Data(edge_index=edge_index, edge_weight=edge_weight, num_nodes=3)
data = ToUndirected()(data)
assert len(data) == 3
assert data.edge_index.tolist() == [[0, 0, 1, 1, 2], [0, 1, 0, 2, 1]]
assert data.edge_weight.tolist() == [2, 2, 2, 1, 1]
assert data.num_nodes == 3
def test_hetero_to_undirected():
edge_index = torch.tensor([[2, 0], [3, 1]])
edge_weight = torch.randn(edge_index.size(1))
edge_attr = torch.randn(edge_index.size(1), 8)
perm = torch.tensor([1, 1, 0, 0])
data = HeteroData()
data['v'].num_nodes = 4
data['w'].num_nodes = 4
data['v', 'v'].edge_index = edge_index
data['v', 'v'].edge_weight = edge_weight
data['v', 'v'].edge_attr = edge_attr
data['v', 'w'].edge_index = edge_index
data['v', 'w'].edge_weight = edge_weight
data['v', 'w'].edge_attr = edge_attr
from torch_geometric.transforms import ToUndirected
assert not data.is_undirected()
data = ToUndirected()(data)
assert data.is_undirected()
assert data['v', 'v'].edge_index.tolist() == [[0, 1, 2, 3], [1, 0, 3, 2]]
assert data['v', 'v'].edge_weight.tolist() == edge_weight[perm].tolist()
assert data['v', 'v'].edge_attr.tolist() == edge_attr[perm].tolist()
assert data['v', 'w'].edge_index.tolist() == edge_index.tolist()
assert data['v', 'w'].edge_weight.tolist() == edge_weight.tolist()
assert data['v', 'w'].edge_attr.tolist() == edge_attr.tolist()
assert data['w', 'v'].edge_index.tolist() == [[3, 1], [2, 0]]
assert data['w', 'v'].edge_weight.tolist() == edge_weight.tolist()
assert data['w', 'v'].edge_attr.tolist() == edge_attr.tolist()
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