def test_fvpd_3_raises_error_for_unrecognized_model():
try:
exchange.fvpd_3('any_model',
vpd=3.,
psi=-0.,
psi_crit=-0.37,
m0=5.278,
steepness_tuzet=1.85,
d0_leuning=30.)
except ValueError as err:
assert err.args[
0] == "The 'model' argument must be one of the following ('misson','tuzet', 'linear' or 'vpd')."
def test_fvpd_3_increases_stress_factor_as_leaf_water_potential_decreases():
for model in ('misson', 'tuzet', 'linear', 'vpd'):
reduction_factor = []
for psi in arange(0, -3, -0.1):
reduction_factor.append(
exchange.fvpd_3(model, vpd=3., psi=psi, psi_crit=-0.37, m0=5.278, steepness_tuzet=1.85, d0_leuning=30.))
assert all(x >= y for x, y in zip(reduction_factor, reduction_factor[1:]))