test for offset correcture now tests if offset really is corrected

test/funcs/test_proc_functions.py

@@ -98,11 +98,12 @@ def test_interpolateGrid(course_5, course_3, flagger):
 
 @pytest.mark.parametrize("flagger", TESTFLAGGER)
 def test_offsetCorrecture(flagger):
-    # just a everything-runs-test
     data = pd.Series(0, index=pd.date_range('2000', freq='1Y', periods=100), name='dat')
     data.iloc[30:40] = -100
     data.iloc[70:80] = 100
     data = dios.DictOfSeries(data)
     flagger = flagger.initFlags(data)
     data, flagger = proc_offsetCorrecture(data, 'dat', flagger, 40, 20, '3Y', 1)
+    assert (data == 0).all()[0]
+