def test_nse_some_q_ts(read_obs, read_sim):
''' Use the DataFrame with only ones to test and a single 0'''
nse = gof_python.nse(read_obs, read_sim)
assert pytest.approx(nse, 0.001) == [-109.64]
def test_nse_mean(obs_simple_1, sim_simple_1):
''' Check whether the we get zero if the simulation is exactly the mean of
the observation.'''
nse = gof_python.nse(obs_simple_1, sim_simple_1)
assert nse == [0]
def test_nse_is_nan(obs_simple, sim_simple):
''' Use the DataFrame with only ones to test'''
nse = gof_python.nse(obs_simple, sim_simple)
assert np.isnan(nse)
def test_nse(obs_simple, sim_simple):
''' Use the DataFrame with only ones to test'''
obs_simple[:4] = 100
sim_simple[:4] = 100
nse = gof_python.nse(obs_simple, sim_simple)
assert nse == [1.0]
def test_nse_some_zeros(obs_some_zeros, sim_some_zeros):
''' Use the DataFrame with only ones to test and a single 0'''
nse = gof_python.nse(obs_some_zeros, sim_some_zeros)
assert pytest.approx(nse, 0.001) == [-3.307692]