Adds test for ross option, placeholder for faiman_rad.

Author: ramaroesilva

tests/test_pvsystem.py

@@ -494,6 +494,40 @@ def test_PVSystem_faiman_celltemp(mocker):
     assert_allclose(out, 56.4, atol=1e-1)
 
 
+def test_PVSystem_faiman_rad_celltemp(mocker):
+    # default values (need to account for a certain ir_down and adjust u0, u1)
+    ir_down = None
+    u0, u1 = 25.0, 6.84
+    sky_view = 1.0
+    emissivity = 0.88
+    
+    temp_model_params = {'ir_down': ir_down, 'u0': u0, 'u1': u1,
+                         'sky_view': sky_view, 'emissivity': emissivity}
+    system = pvsystem.PVSystem(temperature_model_parameters=temp_model_params)
+    mocker.spy(temperature, 'faiman_rad')
+    temps = 25
+    irrads = 1000
+    winds = 1
+    out = system.get_cell_temperature(irrads, temps, winds, model='faiman_rad')
+    temperature.faiman_rad.assert_called_once_with(irrads, temps, winds, u0, u1,
+                                                   sky_view, emissivity)
+    assert_allclose(out, 56.4, atol=1e-1)
+
+
+def test_PVSystem_ross_celltemp(mocker):
+    # example value
+    k = 0.0208 # free-standing system
+    
+    temp_model_params = {'k': k}
+    system = pvsystem.PVSystem(temperature_model_parameters=temp_model_params)
+    mocker.spy(temperature, 'ross')
+    temps = 25
+    irrads = 1000
+    out = system.get_cell_temperature(irrads, temps, model='ross')
+    temperature.faiman_rad.assert_called_once_with(irrads, temps, k)
+    assert_allclose(out, 45.8, atol=1e-1)
+
+
 def test_PVSystem_noct_celltemp(mocker):
     poa_global, temp_air, wind_speed, noct, module_efficiency = (
         1000., 25., 1., 45., 0.2)