Test Case Design for HIL

#!/usr/bin/env python3
# Systematic test case design for ABS wheel speed threshold
# Requirement: ABS activates when any wheel slip > SLIP_THRESHOLD (default 15%)

import itertools

def design_abs_threshold_tests(slip_threshold_pct=15.0):
    """Generate boundary value + equivalence class test cases"""

    # Equivalence classes for slip ratio
    below_threshold = slip_threshold_pct - 5.0   # clearly below: no ABS
    at_lower_bound  = slip_threshold_pct - 0.1   # just below: no ABS
    at_threshold    = slip_threshold_pct         # exactly at: ABS should activate
    at_upper_bound  = slip_threshold_pct + 0.1   # just above: ABS activates
    above_threshold = slip_threshold_pct + 10.0  # clearly above: ABS

    # Equivalence classes for vehicle speed
    speeds = [5.0, 50.0, 100.0, 200.0]  # km/h

    test_cases = []
    for speed in speeds:
        for slip in [below_threshold, at_lower_bound, at_threshold,
                     at_upper_bound, above_threshold]:
            expected_abs = slip >= at_threshold
            test_cases.append({
                "id": f"TC_ABS_SLIP_{int(speed)}kph_{int(slip*10)}",
                "speed_kph":   speed,
                "slip_pct":    slip,
                "expect_abs":  expected_abs,
            })

    print(f"Generated {len(test_cases)} test cases")
    for tc in test_cases[:5]:  # show first 5
        print(f"  {tc['id']:40s}  ABS={tc['expect_abs']}")
    return test_cases

design_abs_threshold_tests()