add singlediode ivcurve_pnts deprecation warning test

Author: reepoi

docs/examples/iv-modeling/plot_singlediode.py

@@ -29,7 +29,8 @@
 # -----------------------
 # This example uses :py:meth:`pvlib.pvsystem.calcparams_desoto` to calculate
 # the 5 electrical parameters needed to solve the single-diode equation.
-# :py:meth:`pvlib.pvsystem.singlediode` and :py:meth:`pvlib.pvsystem.i_from_v` are used to generate the IV curves.
+# :py:meth:`pvlib.pvsystem.singlediode` and :py:meth:`pvlib.pvsystem.i_from_v`
+# are used to generate the IV curves.
 
 from pvlib import pvsystem
 import numpy as np

pvlib/tests/test_pvsystem.py

@@ -1426,6 +1426,13 @@ def test_singlediode_series_ivcurve(cec_module_params):
         assert_allclose(v, expected[k], atol=1e-6)
 
 
+@pytest.mark.parametrize('method', ['lambertw', 'brentq', 'newton'])
+def test_singlediode_ivcurvepnts_deprecation_warning(method):
+    with pytest.warns(pvlibDeprecationWarning):
+        pvsystem.singlediode(7., 6e-7, .1, 20., .5, ivcurve_pnts=3,
+                             method=method)
+
+
 def test_scale_voltage_current_power():
     data = pd.DataFrame(
         np.array([[2, 1.5, 10, 8, 12, 0.5, 1.5]]),