def test_ones(self):
data = np.ones((100, 100)) * 10
beta = dpct.bst_to_beta(data, 200000)
assert data.shape == beta.shape
assert (data != 0.0).all()
def test_bst_to_beta_to_bst(self):
bst = 10e-6
output = dpct.beta_to_bst(dpct.bst_to_beta(bst, 200000), 200000)
assert bst == output
def test_known_value(self):
# From https://dx.doi.org/10.1016/j.ultramic.2016.03.006
bst = 10e-9 * 1 # 10 nm, 1 Tesla
av = 200000 # 200 kV
beta = dpct.bst_to_beta(bst, av)
assert approx(beta, rel=1e-4) == 6.064e-6
def test_zero(self):
data = np.zeros((100, 100))
beta = dpct.bst_to_beta(data, 200000)
assert data.shape == beta.shape
assert (data == 0.0).all()
def test_beta_to_bst_to_beta(self):
beta = 2e-6
output = dpct.bst_to_beta(dpct.beta_to_bst(beta, 200000), 200000)
assert beta == output