def test_from_scalar():
x = Tensor.from_scalar(-2.0)
assert x.order == 0
assert x.dimensions == ()
assert x.modes == ()
assert x.mode_ordering == ()
assert x.format == Format((), ())
assert x.to_dok() == {(): -2.0}
def test_to_float():
x = Tensor.from_scalar(2.0)
assert float(x) == 2.0