Fix old comparative tests script

It needs to be run from the root of the repository

ramp/test/test_run.py

@@ -8,6 +8,8 @@
 # %% Import required modules
 import pandas as pd
 import matplotlib.pyplot as plt
+from ramp.core.core import UseCase
+from ramp.post_process import post_process as pp
 import os
 
 # %% Function to test the output against reference results
@@ -74,6 +76,7 @@ def series_to_average(profile_series, num_days):
     axes[n - 1].legend()
     axes[n - 1].set_xticklabels([])
     axes[n - 2].set_xticklabels([])
+    plt.show()
 
 
 # %% Testing the output and providing visual result
@@ -84,5 +87,25 @@ def series_to_average(profile_series, num_days):
 by the tested code changes. If any differences are there, the developers should 
 evaluate whether these are as expected/designed or not
 """
+from ramp.example.input_file_1 import User_list as User_list1
+from ramp.example.input_file_2 import User_list as User_list2
+from ramp.example.input_file_3 import User_list as User_list3
 
-test_output("../results", "../test", num_input_files=3)
+for i, ul in enumerate([User_list1, User_list2, User_list3]):
+    of_path = os.path.join(pp.BASE_PATH, "test", "results", f"output_file_{i + 1}.csv")
+    if os.path.exists(of_path) is False:
+        uc = UseCase(
+            users=ul,
+            parallel_processing=False,
+        )
+        uc.initialize(peak_enlarge=0.15, num_days=30)
+
+        Profiles_list = uc.generate_daily_load_profiles(flat=True)
+
+        pp.export_series(Profiles_list, ofname=of_path)
+
+test_output(
+    os.path.join(pp.BASE_PATH, "test", "results"),
+    os.path.join(pp.BASE_PATH, "test"),
+    num_input_files=3,
+)