lower case hourly frequency

Author: martin-springer

rdtools/test/analysis_chains_test.py

@@ -744,7 +744,7 @@ def test_plot_degradation_timeseries(sensor_analysis, clearsky_analysis):
 
 def test_energy_from_power_hourly_data():
 
-    times = pd.date_range("2019-01-01 00:00:00", periods=3, freq="H")
+    times = pd.date_range("2019-01-01 00:00:00", periods=3, freq="h")
     pv = pd.Series([1.2, 2.8, 2.0], index=times)
 
     energy = normalization.energy_from_power(pv)
@@ -753,7 +753,7 @@ def test_energy_from_power_hourly_data():
 
 def test_energy_from_power_shifted_hourly_data():
 
-    times = pd.date_range("2019-01-01 00:30:00", periods=3, freq="H")
+    times = pd.date_range("2019-01-01 00:30:00", periods=3, freq="h")
     pv = pd.Series([1.2, 2.8, 2.0], index=times)
 
     energy = normalization.energy_from_power(pv)