def test_from_com(self, type_, com):
from_com = EWMA.from_center_of_mass(
inputs=[USEquityPricing.close],
window_length=20,
center_of_mass=com,
)
implied_com = self.decay_rate_to_com(from_com.params['decay_rate'])
assert_almost_equal(com, implied_com)
