test_cases = [
    {
        "predictions": ["Hi.", "I'm sorry to hear that", "I don't know"],
        "result": {"metric_score": 0}
    },
    {
        "predictions": ["Hi.", "I'm sorry to hear that", "I don't know"],
        "result": {"metric_score": 1}
    },
    {
        "predictions": ["Hi.", "I'm sorry to hear that", "I don't know"],
        "result": {"metric_score": 0.5}
    }
]