def test_pvcell_calc_now_flag():
"""
Test ``_calc_now`` turns off recalc in ``__setattr__``.
"""
pvc = PVcell()
itest, vtest, ptest = pvc.Icell, pvc.Vcell, pvc.Pcell
pvc._calc_now = False
pvc.Rs = 0.001
assert np.allclose(itest, pvc.Icell)
assert np.allclose(vtest, pvc.Vcell)
assert np.allclose(ptest, pvc.Pcell)
icell, vcell, pcell = pvc.calcCell()
pvc._calc_now = True
assert np.allclose(icell, pvc.Icell)
assert np.allclose(vcell, pvc.Vcell)
assert np.allclose(pcell, pvc.Pcell)
def test_update():
pvc = PVcell()
Rs = pvc.Rs
itest = pvc.Icell[170]
pvc.update(Rs=0.001)
assert np.isclose(pvc.Icell[170], 5.79691674)
pvc._calc_now = False
pvc.Rs = Rs
pvc.update() # resets _calc_now to True
assert np.isclose(pvc.Icell[170], itest)
assert pvc._calc_now
