public void CalculateMonthlyPremium_Throw_When_ParameterIsNull()
{
var ex = Assert.Throws <BusinessException>(() => _calculatorService.CalculateMonthlyPremium(null));
Assert.IsTrue(Constants.CALCULATOR_PARAMETER_NULL_ERROR == ex.Message, "CalculateMonthlyPremium_Throw_When_ParameterIsNull success");
}
