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import pandas as pd
import sys
import os
import numpy as np
# Add the project root to the path so we can import modules
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
from core.signal.arcing import calculate_arcing_parameters
def test_arcing_analysis():
print("Testing calculate_arcing_parameters...")
# Create a synthetic DCRM trace
# 0-50ms: Closed (R=40)
# 50-60ms: Motion starts (Travel changes)
# 60ms: T2 Main Parting (R jumps to 200)
# 60-80ms: Arcing Zone (R=200)
# 80ms: T4 Arcing Parting (R jumps to Infinity/2000)
time = np.arange(0, 100, 1) # 0 to 99 ms
resistance = np.zeros(100)
travel = np.zeros(100)
# Fill Resistance
resistance[0:60] = 40.0
resistance[60:80] = 200.0
resistance[80:] = 2000.0
# Fill Travel (Linear opening for simple speed calc)
# Speed = 1 m/s = 1 mm/ms
travel[0:50] = 0.0
travel[50:] = np.arange(0, 50, 1)
df = pd.DataFrame({
'Time_ms': time,
'Resistance': resistance,
'Travel': travel,
'Current': [0]*100 # Not used in this calc
})
result = calculate_arcing_parameters(df)
print("Status:", result['status'])
print("Events:", result['events'])
print("Metrics:", result['metrics'])
# Assertions
events = result['events']
metrics = result['metrics']
# T2 should be around 60ms
assert events['T2_main_separation'] == 60.0
# T4 should be around 80ms
assert events['T4_arcing_separation'] == 80.0
# Ra should be 200.0
assert metrics['Ra_avg_arcing_res'] == 200.0
# Da calculation check
# Speed is approx 1.0 m/s
# Duration = 20ms
# Da = 20 * 1.0 = 20.0 mm
# Allow small margin for gradient calculation differences
assert 19.0 < metrics['Da_arcing_wipe'] < 21.0
print("Test Passed!")
if __name__ == "__main__":
test_arcing_analysis()
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