def test_collate_dicts(graphs_nx, features_shapes, device):
graphs_in = [
add_random_features(Graph.from_networkx(g),
**features_shapes).to(device) for g in graphs_nx
]
graphs_out = list(reversed(graphs_in))
xs = torch.rand(len(graphs_in), 10, 32)
ys = torch.rand(len(graphs_in), 7)
samples = [{
'in': gi,
'x': x,
'y': y,
'out': go
} for gi, x, y, go in zip(graphs_in, xs, ys, graphs_out)]
batch = GraphBatch.collate(samples)
for g1, g2 in zip(graphs_in, batch['in']):
assert_graphs_equal(g1, g2)
torch.testing.assert_allclose(xs, batch['x'])
torch.testing.assert_allclose(ys, batch['y'])
for g1, g2 in zip(graphs_out, batch['out']):
assert_graphs_equal(g1, g2)
def test_device(graph, features_shapes, device):
graph = add_random_features(graph, **features_shapes)
other_graph = graph.to(device)
for k in other_graph._feature_fields:
assert (getattr(other_graph, k) is None) or (getattr(
other_graph, k).device == device)
assert_graphs_equal(graph, other_graph.cpu())
def test_from_graphs(graphs, features_shapes, device):
graphs = [
add_random_features(g, **features_shapes).to(device) for g in graphs
]
graphbatch = GraphBatch.from_graphs(graphs)
validate_batch(graphbatch)
assert len(graphs) == len(graphbatch) == graphbatch.num_graphs
assert [g.num_nodes
for g in graphs] == graphbatch.num_nodes_by_graph.tolist()
assert [g.num_edges
for g in graphs] == graphbatch.num_edges_by_graph.tolist()
# Test sequential access (__iter__)
for g, gb in zip(graphs, graphbatch):
assert_graphs_equal(g, gb)
# Test random access (__getitem__)
for i in range(len(graphbatch)):
assert_graphs_equal(graphs[i], graphbatch[i])
def test_collate_tuples(graphs_nx, features_shapes, device):
graphs_in = [
add_random_features(Graph.from_networkx(g),
**features_shapes).to(device) for g in graphs_nx
]
graphs_out = list(reversed(graphs_in))
xs = torch.rand(len(graphs_in), 10, 32)
ys = torch.rand(len(graphs_in), 7)
samples = list(zip(graphs_in, xs, ys, graphs_out))
batch = GraphBatch.collate(samples)
for g1, g2 in zip(graphs_in, batch[0]):
assert_graphs_equal(g1, g2)
torch.testing.assert_allclose(xs, batch[1])
torch.testing.assert_allclose(ys, batch[2])
for g1, g2 in zip(graphs_out, batch[3]):
assert_graphs_equal(g1, g2)
def test_corner_cases(features_shapes, device):
# Only some graphs have node/edge features, global features are either present on all of them or absent from all
gfs = features_shapes['global_features_shape']
graphs = [
add_random_features(Graph(num_nodes=0, num_edges=0),
global_features_shape=gfs),
add_random_features(Graph(num_nodes=0, num_edges=0),
global_features_shape=gfs),
add_random_features(Graph(num_nodes=3, num_edges=0),
**features_shapes),
add_random_features(Graph(num_nodes=0, num_edges=0),
**features_shapes),
add_random_features(
Graph(num_nodes=2,
senders=torch.tensor([0, 1]),
receivers=torch.tensor([1, 0])), **features_shapes)
]
graphbatch = GraphBatch.from_graphs(graphs).to(device)
validate_batch(graphbatch)
for g_orig, g_batch in zip(graphs, graphbatch):
assert_graphs_equal(g_orig, g_batch.cpu())
# Global features should be either present on all graphs or absent from all graphs
with pytest.raises(ValueError):
GraphBatch.from_graphs([
Graph(num_nodes=0, num_edges=0),
add_random_features(Graph(num_nodes=0, num_edges=0),
global_features_shape=10)
])
with pytest.raises(ValueError):
GraphBatch.from_graphs([
add_random_features(Graph(num_nodes=0, num_edges=0),
global_features_shape=10),
Graph(num_nodes=0, num_edges=0)
])
def test_from_to_networkxs(graphs_nx, features_shapes, device):
graphs_nx = [add_random_features(g, **features_shapes) for g in graphs_nx]
graphbatch = GraphBatch.from_networkxs(graphs_nx).to(device)
validate_batch(graphbatch)
assert len(graphs_nx) == len(graphbatch) == graphbatch.num_graphs
assert [g.number_of_nodes()
for g in graphs_nx] == graphbatch.num_nodes_by_graph.tolist()
assert [g.number_of_edges()
for g in graphs_nx] == graphbatch.num_edges_by_graph.tolist()
# Test sequential access (__iter__)
for g_nx, g in zip(graphs_nx, graphbatch):
assert_graphs_equal(g_nx, g.cpu())
# Test random access (__getitem__)
for i in range(len(graphbatch)):
assert_graphs_equal(graphs_nx[i], graphbatch[i].cpu())
# Test back conversion
graphs_nx_back = graphbatch.cpu().to_networkxs()
for g1, g2 in zip(graphs_nx, graphs_nx_back):
assert_graphs_equal(g1, g2)
def test_from_networkx(graph_nx, features_shapes):
graph_nx = add_random_features(graph_nx, **features_shapes)
graph = Graph.from_networkx(graph_nx)
assert_graphs_equal(graph_nx, graph)
def test_to_networkx(graph, features_shapes):
graph = add_random_features(graph, **features_shapes)
graph_nx = graph.to_networkx()
assert_graphs_equal(graph, graph_nx)