from math import pi as PI
import torch
from torch_geometric.transforms import Polar
from torch_geometric.data import Data
def test_polar():
assert Polar().__repr__() == 'Polar(norm=True, max_value=None)'
pos = torch.Tensor([[0, 0], [1, 0]])
edge_index = torch.tensor([[0, 1], [1, 0]])
edge_attr = torch.Tensor([1, 1])
data = Data(edge_index=edge_index, pos=pos)
data = Polar(norm=False)(data)
assert len(data) == 3
assert data.pos.tolist() == pos.tolist()
assert data.edge_index.tolist() == edge_index.tolist()
assert torch.allclose(
data.edge_attr, torch.Tensor([[1, 0], [1, PI]]), atol=1e-04)
data = Data(edge_index=edge_index, pos=pos, edge_attr=edge_attr)
data = Polar(norm=True)(data)
assert len(data) == 3
assert data.pos.tolist() == pos.tolist()
assert data.edge_index.tolist() == edge_index.tolist()
assert torch.allclose(
data.edge_attr, torch.Tensor([[1, 1, 0], [1, 1, 0.5]]), atol=1e-04)
