test compat with pytest 4.0

docs/sphinx/source/whatsnew/v0.6.1.rst

@@ -55,6 +55,7 @@ Bug fixes
 Testing
 ~~~~~~~
 * Add test for :func:`~pvlib.solarposition.hour_angle` (:issue:`597`)
+* Update tests to be compatible with pytest 4.0. (:issue:`623`)
 
 
 Contributors

pvlib/test/test_clearsky.py

@@ -279,8 +279,8 @@ def test_haurwitz():
                                       487.894132885425,
                                       778.766689344363,
                                       1035.09203253450]),
-                             columns=['ghi'],
-                             index=apparent_solar_zenith)
+                            columns=['ghi'],
+                            index=apparent_solar_zenith)
     out = clearsky.haurwitz(data_in['apparent_zenith'])
     assert_frame_equal(expected, out)
 
@@ -293,7 +293,7 @@ def test_simplified_solis_scalar_elevation():
 
     out = clearsky.simplified_solis(80)
     for k, v in expected.items():
-        yield assert_allclose, expected[k], out[k]
+        assert_allclose(expected[k], out[k])
 
 
 def test_simplified_solis_scalar_neg_elevation():
@@ -304,7 +304,7 @@ def test_simplified_solis_scalar_neg_elevation():
 
     out = clearsky.simplified_solis(-10)
     for k, v in expected.items():
-        yield assert_allclose, expected[k], out[k]
+        assert_allclose(expected[k], out[k])
 
 
 def test_simplified_solis_series_elevation():

pvlib/test/test_forecast.py

@@ -1,10 +1,7 @@
 from datetime import datetime, timedelta
-import inspect
-from math import isnan
 from pytz import timezone
 import warnings
 
-import numpy as np
 import pandas as pd
 
 import pytest
@@ -14,13 +11,8 @@
 
 pytestmark = pytest.mark.skipif(not has_siphon, reason='requires siphon')
 
-from pvlib.location import Location
 
 if has_siphon:
-    import requests
-    from requests.exceptions import HTTPError
-    from xml.etree.ElementTree import ParseError
-
     from pvlib.forecast import GFS, HRRR_ESRL, HRRR, NAM, NDFD, RAP
 
     # setup times and location to be tested. Tucson, AZ
@@ -31,15 +23,16 @@
     _end = _start + pd.Timedelta(days=1)
     _modelclasses = [
         GFS, NAM, HRRR, NDFD, RAP,
-        skip_windows(
-            pytest.mark.xfail(
-                pytest.mark.timeout(HRRR_ESRL, timeout=60),
-                reason="HRRR_ESRL is unreliable"))]
+        pytest.param(
+            HRRR_ESRL, marks=[
+                skip_windows,
+                pytest.mark.xfail(reason="HRRR_ESRL is unreliable"),
+                pytest.mark.timeout(timeout=60)])]
     _working_models = []
     _variables = ['temp_air', 'wind_speed', 'total_clouds', 'low_clouds',
-                  'mid_clouds', 'high_clouds', 'dni', 'dhi', 'ghi',]
+                  'mid_clouds', 'high_clouds', 'dni', 'dhi', 'ghi']
     _nonnan_variables = ['temp_air', 'wind_speed', 'total_clouds', 'dni',
-                         'dhi', 'ghi',]
+                         'dhi', 'ghi']
 else:
     _modelclasses = []
 

pvlib/test/test_irradiance.py

@@ -10,9 +10,8 @@
 
 from pandas.util.testing import assert_frame_equal, assert_series_equal
 
-from pvlib import atmosphere, irradiance, solarposition
+from pvlib import irradiance
 from pvlib._deprecation import pvlibDeprecationWarning
-from pvlib.location import Location
 
 from conftest import (fail_on_pvlib_version, needs_numpy_1_10, pandas_0_22,
                       requires_ephem, requires_numba)
@@ -102,7 +101,7 @@ def test_deprecated_07():
     (timestamp, value)
 ])
 @pytest.mark.parametrize('method', [
-    'asce', 'spencer', 'nrel', requires_ephem('pyephem')])
+    'asce', 'spencer', 'nrel', pytest.param('pyephem', marks=requires_ephem)])
 def test_get_extra_radiation(input, expected, method):
     out = irradiance.get_extra_radiation(input)
     assert_allclose(out, expected, atol=1)

pvlib/test/test_modelchain.py

@@ -55,9 +55,9 @@ def cec_dc_snl_ac_system(sam_data):
 
 
 @pytest.fixture
-def pvsyst_dc_snl_ac_system(sam_data):
+def pvsyst_dc_snl_ac_system(sam_data, pvsyst_module_params):
     module = 'PVsyst test module'
-    module_parameters = pvsyst_module_params()
+    module_parameters = pvsyst_module_params
     module_parameters['b'] = 0.05
     inverters = sam_data['cecinverter']
     inverter = inverters['ABB__MICRO_0_25_I_OUTD_US_208_208V__CEC_2014_'].copy()
@@ -446,12 +446,16 @@ def test_bad_get_orientation():
 @fail_on_pvlib_version('0.7')
 def test_deprecated_07():
     # explicit system creation call because fail_on_pvlib_version
-    # does not support decorators
-    system = cec_dc_snl_ac_system(sam_data())
+    # does not support decorators.
+    # does not matter what the parameters are, just fake it until we make it
+    module_parameters = {'R_sh_ref': 1, 'a_ref': 1, 'I_o_ref': 1,
+                         'alpha_sc': 1, 'I_L_ref': 1, 'R_s': 1}
+    system = PVSystem(module_parameters=module_parameters)
     with pytest.warns(pvlibDeprecationWarning):
         mc = ModelChain(system, location,
                         dc_model='singlediode',  # this should fail after 0.7
-                        aoi_model='no_loss', spectral_model='no_loss')
+                        aoi_model='no_loss', spectral_model='no_loss',
+                        ac_model='snlinverter')
 
 
 @requires_scipy

pvlib/test/test_singlediode.py

@@ -129,8 +129,7 @@ def test_brentq_fs_495():
     return isc, voc, imp, vmp, pmp, i, v, pvs
 
 
-@pytest.fixture
-def pvsyst_fs_495():
+def get_pvsyst_fs_495():
     """
     PVsyst parameters for First Solar FS-495 module from PVSyst-6.7.2 database.
 
@@ -156,16 +155,23 @@ def pvsyst_fs_495():
 
 
 @pytest.mark.parametrize(
-    'poa, temp_cell, expected, tol',
-    [(pvsyst_fs_495()['irrad_ref'], pvsyst_fs_495()['temp_ref'],
-      {'pmp': pvsyst_fs_495()['I_mp_ref'] * pvsyst_fs_495()['V_mp_ref'],
-       'isc': pvsyst_fs_495()['I_sc_ref'], 'voc': pvsyst_fs_495()['V_oc_ref']},
-      (5e-4, 0.04)),
-     (POA, TCELL, {'pmp': 76.26, 'isc': 1.387, 'voc': 79.29}, (1e-3, 1e-3))]
+    'poa, temp_cell, expected, tol', [
+        (
+            get_pvsyst_fs_495()['irrad_ref'],
+            get_pvsyst_fs_495()['temp_ref'],
+            {
+                'pmp': (get_pvsyst_fs_495()['I_mp_ref'] *
+                        get_pvsyst_fs_495()['V_mp_ref']),
+                'isc': get_pvsyst_fs_495()['I_sc_ref'],
+                'voc': get_pvsyst_fs_495()['V_oc_ref']
+            },
+            (5e-4, 0.04)
+        ),
+        (POA, TCELL, {'pmp': 76.26, 'isc': 1.387, 'voc': 79.29}, (1e-3, 1e-3))]
 )  # DeSoto @(888[W/m**2], 55[degC]) = {Pmp: 72.71, Isc: 1.402, Voc: 75.42)
-def test_pvsyst_recombination_loss(pvsyst_fs_495, poa, temp_cell, expected,
-                                   tol):
+def test_pvsyst_recombination_loss(poa, temp_cell, expected, tol):
     """test PVSst recombination loss"""
+    pvsyst_fs_495 = get_pvsyst_fs_495()
     # first evaluate PVSyst model with thin-film recombination loss current
     # at reference conditions
     x = pvsystem.calcparams_pvsyst(

pvlib/test/test_solarposition.py

@@ -39,6 +39,12 @@ def golden_mst():
 
 @pytest.fixture()
 def expected_solpos():
+    return _expected_solpos_df()
+
+
+# hack to make tests work without too much modification while avoiding
+# pytest 4.0 inability to call features directly
+def _expected_solpos_df():
     return pd.DataFrame({'elevation': 39.872046,
                          'apparent_zenith': 50.111622,
                          'azimuth': 194.340241,
@@ -483,15 +489,14 @@ def test_get_solarposition_error(golden):
                                                      method='error this')
 
 
-@pytest.mark.parametrize(
-    "pressure, expected", [
-    (82000, expected_solpos()),
+@pytest.mark.parametrize("pressure, expected", [
+    (82000, _expected_solpos_df()),
     (90000, pd.DataFrame(
         np.array([[  39.88997,   50.11003,  194.34024,   39.87205,   14.64151,
                      50.12795]]),
-        columns=['apparent_elevation', 'apparent_zenith', 'azimuth', 'elevation',
-                 'equation_of_time', 'zenith'],
-        index=expected_solpos().index))
+        columns=['apparent_elevation', 'apparent_zenith', 'azimuth',
+                 'elevation', 'equation_of_time', 'zenith'],
+        index=['2003-10-17T12:30:30Z']))
     ])
 def test_get_solarposition_pressure(pressure, expected, golden):
     times = pd.date_range(datetime.datetime(2003,10,17,13,30,30),
@@ -507,15 +512,14 @@ def test_get_solarposition_pressure(pressure, expected, golden):
     assert_frame_equal(this_expected, ephem_data[this_expected.columns])
 
 
-@pytest.mark.parametrize(
-    "altitude, expected",
-    [(golden().altitude, expected_solpos()),
+@pytest.mark.parametrize("altitude, expected", [
+    (1830.14, _expected_solpos_df()),
     (2000, pd.DataFrame(
         np.array([[  39.88788,   50.11212,  194.34024,   39.87205,   14.64151,
                      50.12795]]),
         columns=['apparent_elevation', 'apparent_zenith', 'azimuth',
                  'elevation', 'equation_of_time', 'zenith'],
-        index=expected_solpos().index))
+        index=['2003-10-17T12:30:30Z']))
     ])
 def test_get_solarposition_altitude(altitude, expected, golden):
     times = pd.date_range(datetime.datetime(2003,10,17,13,30,30),
@@ -531,17 +535,18 @@ def test_get_solarposition_altitude(altitude, expected, golden):
     assert_frame_equal(this_expected, ephem_data[this_expected.columns])
 
 
-@pytest.mark.parametrize(
-    "delta_t, method, expected", [
-        (None, 'nrel_numpy', expected_solpos_multi()),
-        (67.0, 'nrel_numpy', expected_solpos_multi()),
-        pytest.mark.xfail(
+@pytest.mark.parametrize("delta_t, method", [
+    (None, 'nrel_numpy'),
+    (67.0, 'nrel_numpy'),
+    pytest.param(
+        None, 'nrel_numba',
+        marks=[pytest.mark.xfail(
             raises=ValueError,
-            reason='spa.calculate_deltat not implemented for numba yet')
-        ((None, 'nrel_numba', expected_solpos_multi())),
-        (67.0, 'nrel_numba', expected_solpos_multi())
+            reason='spa.calculate_deltat not implemented for numba yet')]),
+    (67.0, 'nrel_numba')
     ])
-def test_get_solarposition_deltat(delta_t, method, expected, golden):
+def test_get_solarposition_deltat(delta_t, method, expected_solpos_multi,
+                                  golden):
     times = pd.date_range(datetime.datetime(2003,10,17,13,30,30),
                           periods=2, freq='D', tz=golden.tz)
     ephem_data = solarposition.get_solarposition(times, golden.latitude,
@@ -550,7 +555,7 @@ def test_get_solarposition_deltat(delta_t, method, expected, golden):
                                                  delta_t=delta_t,
                                                  temperature=11,
                                                  method=method)
-    this_expected = expected.copy()
+    this_expected = expected_solpos_multi
     this_expected.index = times
     this_expected = np.round(this_expected, 5)
     ephem_data = np.round(ephem_data, 5)
@@ -673,10 +678,8 @@ def test_analytical_azimuth():
                                                        decl, zenith)
 
     idx = np.where(solar_zenith < np.pi/2)
-    assert np.allclose(azimuth_1[idx], solar_azimuth.as_matrix()[idx],
-                       atol=0.01)
-    assert np.allclose(azimuth_2[idx], solar_azimuth.as_matrix()[idx],
-                       atol=0.017)
+    assert np.allclose(azimuth_1[idx], solar_azimuth.values[idx], atol=0.01)
+    assert np.allclose(azimuth_2[idx], solar_azimuth.values[idx], atol=0.017)
 
     # test for NaN values at boundary conditions (PR #431)
     test_angles = np.radians(np.array(