def testWavenumberConversion(self):
a = Transition(500 * u.nm, 26, 1)
a.wavenumber = 2500000 * 1 / u.m
assert a.wavelength.value == pytest.approx(4e-5)
assert a.wavelength.units == u.cm
assert a.wavenumber.units == u.cm**-1
def testWavenumberAssigment(self):
a = Transition(500 * u.nm, 26, 1)
assert a.wavenumber.value == pytest.approx(20000)
a.wavenumber = 20000 * u.cm**-1
assert a.wavelength.value == pytest.approx(5e-5)