def test_switch_backend(backend):
a = tn.Node(np.random.rand(3, 3, 3), name="A", backend="numpy")
b = tn.Node(np.random.rand(3, 3, 3), name="B", backend="numpy")
c = tn.Node(np.random.rand(3, 3, 3), name="C", backend="numpy")
nodes = [a, b, c]
tn.switch_backend(nodes, backend)
assert nodes[0].backend.name == backend
def test_switch_backend_raises_error(num_charges):
np.random.seed(10)
a = tn.Node(
get_random((3, 3, 3), num_charges=num_charges, dtype=np.float64),
backend='symmetric')
with pytest.raises(NotImplementedError):
tn.switch_backend({a}, 'numpy')
def test_switch_backend():
np.random.seed(10)
a = tn.Node(np.random.rand(3, 3, 3), name="A", backend="numpy")
b = tn.Node(np.random.rand(3, 3, 3), name="B", backend="numpy")
c = tn.Node(np.random.rand(3, 3, 3), name="C", backend="numpy")
nodes = [a, b, c]
with pytest.raises(ValueError):
tn.switch_backend(nodes, 'symmetric')
def test_switch_backend_raises_error(backend):
a = tn.Node(np.random.rand(3, 3, 3))
a.backend = BaseBackend()
with pytest.raises(NotImplementedError):
tn.switch_backend({a}, backend)
def test_switch_backend_raises_error_2():
np.random.seed(10)
a = tn.Node(np.random.rand(3, 3, 3))
with pytest.raises(ValueError):
tn.switch_backend({a}, 'symmetric')
