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import pytest
import torch
from torch_geometric.data import Data, HeteroData
from torch_geometric.transforms import RandomNodeSplit
@pytest.mark.parametrize('num_splits', [1, 2])
def test_random_node_split(num_splits):
num_nodes, num_classes = 1000, 4
x = torch.randn(num_nodes, 16)
y = torch.randint(num_classes, (num_nodes, ), dtype=torch.long)
data = Data(x=x, y=y)
transform = RandomNodeSplit(split='train_rest', num_splits=num_splits,
num_val=100, num_test=200)
assert str(transform) == 'RandomNodeSplit(split=train_rest)'
data = transform(data)
assert len(data) == 5
train_mask = data.train_mask
train_mask = train_mask.unsqueeze(-1) if num_splits == 1 else train_mask
assert train_mask.size() == (num_nodes, num_splits)
val_mask = data.val_mask
val_mask = val_mask.unsqueeze(-1) if num_splits == 1 else val_mask
assert val_mask.size() == (num_nodes, num_splits)
test_mask = data.test_mask
test_mask = test_mask.unsqueeze(-1) if num_splits == 1 else test_mask
assert test_mask.size() == (num_nodes, num_splits)
for i in range(train_mask.size(-1)):
assert train_mask[:, i].sum() == num_nodes - 100 - 200
assert val_mask[:, i].sum() == 100
assert test_mask[:, i].sum() == 200
assert (train_mask[:, i] & val_mask[:, i] & test_mask[:, i]).sum() == 0
assert ((train_mask[:, i] | val_mask[:, i]
| test_mask[:, i]).sum() == num_nodes)
transform = RandomNodeSplit(split='train_rest', num_splits=num_splits,
num_val=0.1, num_test=0.2)
data = transform(data)
train_mask = data.train_mask
train_mask = train_mask.unsqueeze(-1) if num_splits == 1 else train_mask
val_mask = data.val_mask
val_mask = val_mask.unsqueeze(-1) if num_splits == 1 else val_mask
test_mask = data.test_mask
test_mask = test_mask.unsqueeze(-1) if num_splits == 1 else test_mask
for i in range(train_mask.size(-1)):
assert train_mask[:, i].sum() == num_nodes - 100 - 200
assert val_mask[:, i].sum() == 100
assert test_mask[:, i].sum() == 200
assert (train_mask[:, i] & val_mask[:, i] & test_mask[:, i]).sum() == 0
assert ((train_mask[:, i] | val_mask[:, i]
| test_mask[:, i]).sum() == num_nodes)
transform = RandomNodeSplit(split='test_rest', num_splits=num_splits,
num_train_per_class=10, num_val=100)
assert str(transform) == 'RandomNodeSplit(split=test_rest)'
data = transform(data)
assert len(data) == 5
train_mask = data.train_mask
train_mask = train_mask.unsqueeze(-1) if num_splits == 1 else train_mask
val_mask = data.val_mask
val_mask = val_mask.unsqueeze(-1) if num_splits == 1 else val_mask
test_mask = data.test_mask
test_mask = test_mask.unsqueeze(-1) if num_splits == 1 else test_mask
for i in range(train_mask.size(-1)):
assert train_mask[:, i].sum() == 10 * num_classes
assert val_mask[:, i].sum() == 100
assert test_mask[:, i].sum() == num_nodes - 10 * num_classes - 100
assert (train_mask[:, i] & val_mask[:, i] & test_mask[:, i]).sum() == 0
assert ((train_mask[:, i] | val_mask[:, i]
| test_mask[:, i]).sum() == num_nodes)
transform = RandomNodeSplit(split='test_rest', num_splits=num_splits,
num_train_per_class=10, num_val=0.1)
data = transform(data)
train_mask = data.train_mask
train_mask = train_mask.unsqueeze(-1) if num_splits == 1 else train_mask
val_mask = data.val_mask
val_mask = val_mask.unsqueeze(-1) if num_splits == 1 else val_mask
test_mask = data.test_mask
test_mask = test_mask.unsqueeze(-1) if num_splits == 1 else test_mask
for i in range(train_mask.size(-1)):
assert train_mask[:, i].sum() == 10 * num_classes
assert val_mask[:, i].sum() == 100
assert test_mask[:, i].sum() == num_nodes - 10 * num_classes - 100
assert (train_mask[:, i] & val_mask[:, i] & test_mask[:, i]).sum() == 0
assert ((train_mask[:, i] | val_mask[:, i]
| test_mask[:, i]).sum() == num_nodes)
transform = RandomNodeSplit(split='random', num_splits=num_splits,
num_train_per_class=10, num_val=100,
num_test=200)
assert str(transform) == 'RandomNodeSplit(split=random)'
data = transform(data)
assert len(data) == 5
train_mask = data.train_mask
train_mask = train_mask.unsqueeze(-1) if num_splits == 1 else train_mask
val_mask = data.val_mask
val_mask = val_mask.unsqueeze(-1) if num_splits == 1 else val_mask
test_mask = data.test_mask
test_mask = test_mask.unsqueeze(-1) if num_splits == 1 else test_mask
for i in range(train_mask.size(-1)):
assert train_mask[:, i].sum() == 10 * num_classes
assert val_mask[:, i].sum() == 100
assert test_mask[:, i].sum() == 200
assert (train_mask[:, i] & val_mask[:, i] & test_mask[:, i]).sum() == 0
assert ((train_mask[:, i] | val_mask[:, i]
| test_mask[:, i]).sum() == 10 * num_classes + 100 + 200)
transform = RandomNodeSplit(split='random', num_splits=num_splits,
num_train_per_class=10, num_val=0.1,
num_test=0.2)
assert str(transform) == 'RandomNodeSplit(split=random)'
data = transform(data)
train_mask = data.train_mask
train_mask = train_mask.unsqueeze(-1) if num_splits == 1 else train_mask
val_mask = data.val_mask
val_mask = val_mask.unsqueeze(-1) if num_splits == 1 else val_mask
test_mask = data.test_mask
test_mask = test_mask.unsqueeze(-1) if num_splits == 1 else test_mask
for i in range(train_mask.size(-1)):
assert train_mask[:, i].sum() == 10 * num_classes
assert val_mask[:, i].sum() == 100
assert test_mask[:, i].sum() == 200
assert (train_mask[:, i] & val_mask[:, i] & test_mask[:, i]).sum() == 0
assert ((train_mask[:, i] | val_mask[:, i]
| test_mask[:, i]).sum() == 10 * num_classes + 100 + 200)
def test_random_node_split_on_hetero_data():
data = HeteroData()
data['paper'].x = torch.randn(2000, 16)
data['paper'].y = torch.randint(4, (2000, ), dtype=torch.long)
data['author'].x = torch.randn(300, 16)
transform = RandomNodeSplit()
assert str(transform) == 'RandomNodeSplit(split=train_rest)'
data = transform(data)
assert len(data) == 5
assert len(data['author']) == 1
assert len(data['paper']) == 5
assert data['paper'].train_mask.sum() == 500
assert data['paper'].val_mask.sum() == 500
assert data['paper'].test_mask.sum() == 1000
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