import torch

from torch_geometric.data import Data
from torch_geometric.transforms import TargetIndegree


def test_target_indegree():
    assert str(TargetIndegree()) == 'TargetIndegree(norm=True, max_value=None)'

    edge_index = torch.tensor([[0, 1, 1, 2], [1, 0, 2, 1]])
    edge_attr = torch.tensor([1.0, 1.0, 1.0, 1.0])

    data = Data(edge_index=edge_index, num_nodes=3)
    data = TargetIndegree(norm=False)(data)
    assert len(data) == 3
    assert data.edge_index.tolist() == edge_index.tolist()
    assert data.edge_attr.tolist() == [[2], [1], [1], [2]]
    assert data.num_nodes == 3

    data = Data(edge_index=edge_index, edge_attr=edge_attr, num_nodes=3)
    data = TargetIndegree(norm=True)(data)
    assert len(data) == 3
    assert data.edge_index.tolist() == edge_index.tolist()
    assert data.edge_attr.tolist() == [[1, 1], [1, 0.5], [1, 0.5], [1, 1]]
    assert data.num_nodes == 3