Implemented unit test for fix of issue 78 (#78)

tests/test_duty_cycle_repetition.py

@@ -0,0 +1,75 @@
+import os
+import pytest
+import numpy as np
+
+from ramp import User, UseCase
+import pandas as pd
+pd.options.plotting.backend = "plotly"
+import plotly.io as pio
+pio.renderers.default = "browser"
+
+@pytest.fixture
+def test_use_case():
+    # Create an instance of UseCase to test fix for the duty cycle repetition issue 78
+
+    #%% Create test user
+    test_user = User(
+        user_name='test_user',
+        num_users=1
+    )
+
+    # Create test appliance
+    test_appliance = test_user.add_appliance(
+        name="test_appliance_with_duty_cycles",
+        func_time=4*60,  # runs for 2 hours per day
+
+        window_1=[6 * 60, 20 * 60],  # usage timeframe from 10:00 to 17:00
+
+        num_windows =1,
+
+        fixed_cycle=1,  # appliance uses duty cycles
+
+        # Duty cycle 1
+        p_11=8000,  # power of the first cycle
+        t_11=2,  # time needed for the first cycle
+        p_12=2000,  # power of the second cycle
+        t_12=18,  # time needed for the second cycle
+    )
+
+    # Create and initialize UseCase
+    duty_cycle_test_uc = UseCase(name='duty_cycle_test', users=[test_user])
+    duty_cycle_test_uc.initialize(num_days=3)
+
+    return duty_cycle_test_uc
+
+class TestUseCase:
+    @pytest.mark.usefixtures("test_use_case")
+
+    def test_daily_load_profile(self, test_use_case):
+
+        # Generate load profiles
+        daily_load_profile = pd.DataFrame(test_use_case.generate_daily_load_profiles(),
+                                          index=test_use_case.datetimeindex)
+
+        # Count separate switch-on events -> whenever there is a jump in the load profile from smaller or equal 0.001
+        # to a value larger 0.001 (0.001 is used in the RAMP algorithm to "mark" available switch-on events, therefore
+        # load profiles are often not actually 0 even though there is no appliance use scheduled
+
+        # create a boolean mask for the condition
+        mask = (daily_load_profile[0] <= 0.001) & (daily_load_profile[0].shift(-1) > 0.001)
+        # Sum the number of switch on events
+        switch_on_count = mask.sum()
+
+        # Get the duration of the test duty cycle
+        test_duty_cycle_duration = test_use_case.appliances[0].t_11 + test_use_case.appliances[0].t_12
+
+        # Calculate how many switch-on events are expected
+        expected_switch_on_count = test_use_case.appliances[0].func_time/test_duty_cycle_duration
+
+        # In rare cases, it might happen that switch-on events are scheduled in direct succession
+        # Therefore, the test should not fail if the number of expected switch-on events is not fully reached.
+        # For the defined test, I allow 2 switch-on events less than expected
+
+        # The test fails, if there are 2 switch-on events less than expected
+
+        assert switch_on_count >= expected_switch_on_count-2