import time

def run_model_handler_test():
    """
    Simulates a test for the ModelHandler's get_response method.
    """
    log = []
    log.append("Running ModelHandler test...")
    # Simulate some test logic
    time.sleep(1)
    log.append("ModelHandler test passed: Placeholder response received.")
    print("\n".join(log)) # Also print to stdio
    return "\n".join(log)

def run_clear_chat_test():
    """
    Simulates a test for the clear_chat functionality.
    """
    log = []
    log.append("Running clear_chat test...")
    # Simulate some test logic
    time.sleep(1)
    log.append("clear_chat test passed: Chatbot and textbox cleared.")
    print("\n".join(log)) # Also print to stdio
    return "\n".join(log)

# You can add more test functions here