def test_instantiation(self):
min_mag = 0.0
max_mag = 7.0
bin_width = 0.01
b_val = 1.0
moment_rate = 4.5e16
mfd = TruncatedGRMFD.from_moment(min_mag, max_mag, bin_width, b_val,
moment_rate)
rates = np.array(mfd.get_annual_occurrence_rates())
computed = np.sum(10**(1.5 * rates[:, 0] + 9.1) * rates[:, 1])
msg = "Scalar Mo rate from MFD does not match the original one"
self.assertAlmostEqual(moment_rate, computed, msg=msg, delta=1e14)
