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import torch
from torch_geometric.data import Data
from torch_geometric.testing import withPackage
from torch_geometric.transforms import RadiusGraph
from torch_geometric.utils import coalesce
@withPackage('torch_cluster')
def test_radius_graph():
assert str(RadiusGraph(r=1)) == 'RadiusGraph(r=1)'
pos = torch.tensor([
[0.0, 0.0],
[1.0, 0.0],
[2.0, 0.0],
[0.0, 1.0],
[-2.0, 0.0],
[0.0, -2.0],
])
data = Data(pos=pos)
data = RadiusGraph(r=1.5)(data)
assert len(data) == 2
assert data.pos.tolist() == pos.tolist()
assert coalesce(data.edge_index).tolist() == [[0, 0, 1, 1, 1, 2, 3, 3],
[1, 3, 0, 2, 3, 1, 0, 1]]
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