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import torch
from torch_geometric.data import Data
from torch_geometric.transforms import RandomFlip
def test_random_flip():
assert str(RandomFlip(axis=0)) == 'RandomFlip(axis=0, p=0.5)'
pos = torch.tensor([[-1.0, 1.0], [-3.0, 0.0], [2.0, -1.0]])
data = Data(pos=pos)
data = RandomFlip(axis=0, p=1)(data)
assert len(data) == 1
assert data.pos.tolist() == [[1.0, 1.0], [3.0, 0.0], [-2.0, -1.0]]
data = Data(pos=pos)
data = RandomFlip(axis=1, p=1)(data)
assert len(data) == 1
assert data.pos.tolist() == [[-1.0, -1.0], [-3.0, 0.0], [2.0, 1.0]]
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