Fix assertion in test_irradiance.py::test_get_ground_diffuse_albedo_0 (#1575)

* Fixed  test_irradiance.py::test_get_ground_diffuse_albedo_0 test assertion is incorrect #1569

* Whats new entry for fixed test_irradiance.py::test_get_ground_diffuse_albedo_0 test assertion is incorrect #1569

Author: bowie2211

docs/sphinx/source/whatsnew/v0.9.4.rst

@@ -18,7 +18,7 @@ Bug fixes
 
 Testing
 ~~~~~~~
-
+* Corrected a flawed test for :py:func:`~pvlib.irradiance.get_ground_diffuse` (:issue:`1569`, :pull:`1575`)
 
 Documentation
 ~~~~~~~~~~~~~
@@ -34,4 +34,5 @@ Requirements
 
 Contributors
 ~~~~~~~~~~~~
-* Christian Orner (:ghuser:`chrisorner`)
+* Christian Orner (:ghuser:`chrisorner`)
+* Marcus Boumans (:ghuser:`bowie2211`)

pvlib/tests/test_irradiance.py

@@ -133,7 +133,7 @@ def test_get_ground_diffuse_simple_series(irrad_data):
 def test_get_ground_diffuse_albedo_0(irrad_data):
     ground_irrad = irradiance.get_ground_diffuse(
         40, irrad_data['ghi'], albedo=0)
-    assert 0 == ground_irrad.all()
+    assert (0 == ground_irrad).all()
 
 
 def test_get_ground_diffuse_albedo_series(times):