TST: update singlediode test for updated atol in pvlib#415

* use `method='lambertw'` for singlediode tests
* update arguments for calcparams_desoto everywhere with effective_irradiance
and expand model parameters a_ref, I_L_ref, I_o_ref, R_sh_ref, and R_s

Author: mikofski

pvlib/test/test_pvsystem.py

@@ -797,7 +797,7 @@ def test_singlediode_array():
 def test_singlediode_floats(sam_data):
     module = 'Example_Module'
     module_parameters = sam_data['cecmod'][module]
-    out = pvsystem.singlediode(7, 6e-7, .1, 20, .5)
+    out = pvsystem.singlediode(7, 6e-7, .1, 20, .5, method='lambertw')
     expected = {'i_xx': 4.2498,
                 'i_mp': 6.1275,
                 'v_oc': 8.1063,
@@ -817,7 +817,7 @@ def test_singlediode_floats(sam_data):
 
 @requires_scipy
 def test_singlediode_floats_ivcurve():
-    out = pvsystem.singlediode(7, 6e-7, .1, 20, .5, ivcurve_pnts=3)
+    out = pvsystem.singlediode(7, 6e-7, .1, 20, .5, ivcurve_pnts=3, method='lambertw')
     expected = {'i_xx': 4.2498,
                 'i_mp': 6.1275,
                 'v_oc': 8.1063,

pvlib/test/test_singlediode_methods.py

@@ -24,8 +24,10 @@
 def test_fast_spr_e20_327():
     spr_e20_327 = CECMOD.SunPower_SPR_E20_327
     x = pvsystem.calcparams_desoto(
-        poa_global=POA, temp_cell=TCELL,
-        alpha_isc=spr_e20_327.alpha_sc, module_parameters=spr_e20_327,
+        effective_irradiance=POA, temp_cell=TCELL,
+        alpha_sc=spr_e20_327.alpha_sc, a_ref=spr_e20_327.a_ref,
+        I_L_ref=spr_e20_327.I_L_ref, I_o_ref=spr_e20_327.I_o_ref,
+        R_sh_ref=spr_e20_327.R_sh_ref, R_s=spr_e20_327.R_s,
         EgRef=1.121, dEgdT=-0.0002677)
     il, io, rs, rsh, nnsvt = x
     tstart = clock()
@@ -59,8 +61,9 @@ def test_fast_spr_e20_327():
 def test_fast_fs_495():
     fs_495 = CECMOD.First_Solar_FS_495
     x = pvsystem.calcparams_desoto(
-        poa_global=POA, temp_cell=TCELL,
-        alpha_isc=fs_495.alpha_sc, module_parameters=fs_495,
+        effective_irradiance=POA, temp_cell=TCELL,
+        alpha_sc=fs_495.alpha_sc, a_ref=fs_495.a_ref, I_L_ref=fs_495.I_L_ref,
+        I_o_ref=fs_495.I_o_ref, R_sh_ref=fs_495.R_sh_ref, R_s=fs_495.R_s,
         EgRef=1.475, dEgdT=-0.0003)
     il, io, rs, rsh, nnsvt = x
     x += (101, )
@@ -95,8 +98,10 @@ def test_fast_fs_495():
 def test_slow_spr_e20_327():
     spr_e20_327 = CECMOD.SunPower_SPR_E20_327
     x = pvsystem.calcparams_desoto(
-        poa_global=POA, temp_cell=TCELL,
-        alpha_isc=spr_e20_327.alpha_sc, module_parameters=spr_e20_327,
+        effective_irradiance=POA, temp_cell=TCELL,
+        alpha_sc=spr_e20_327.alpha_sc, a_ref=spr_e20_327.a_ref,
+        I_L_ref=spr_e20_327.I_L_ref, I_o_ref=spr_e20_327.I_o_ref,
+        R_sh_ref=spr_e20_327.R_sh_ref, R_s=spr_e20_327.R_s,
         EgRef=1.121, dEgdT=-0.0002677)
     il, io, rs, rsh, nnsvt = x
     tstart = clock()
@@ -130,8 +135,9 @@ def test_slow_spr_e20_327():
 def test_slow_fs_495():
     fs_495 = CECMOD.First_Solar_FS_495
     x = pvsystem.calcparams_desoto(
-        poa_global=POA, temp_cell=TCELL,
-        alpha_isc=fs_495.alpha_sc, module_parameters=fs_495,
+        effective_irradiance=POA, temp_cell=TCELL,
+        alpha_sc=fs_495.alpha_sc, a_ref=fs_495.a_ref, I_L_ref=fs_495.I_L_ref,
+        I_o_ref=fs_495.I_o_ref, R_sh_ref=fs_495.R_sh_ref, R_s=fs_495.R_s,
         EgRef=1.475, dEgdT=-0.0003)
     il, io, rs, rsh, nnsvt = x
     x += (101, )