How to mock up appconfig value?

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Hui Zhao

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Nov 9, 2015, 8:25:28 AM11/9/15
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Say I have 
public class FundsTransferAuthorization
    {
        public decimal MaxTransferableAmount { get; set; }
        public decimal MinTransferableAmount { get; set; }
        private ChargeAuthorization _chargeAuthorization;
        private readonly IPromptPlayer _promptPlayer;
        public FundsTransferAuthorization(IPromptPlayer promptPlayer)
        {
            _promptPlayer = promptPlayer;
            GetAuthorizationParameters();
        }

        private void GetAuthorizationParameters()
        {
            _maxDigit = _promptPlayer.MaxDigit;
             MaxTransferableAmount = Convert.ToDecimal(GetMaximumTransferableAmount());
            MinTransferableAmount = Convert.ToDecimal(GetMinimumTransferableAmount());
        }
        public virtual string GetMinimumTransferableAmount()
        {
            return ConfigurationManager.AppSettings["minimumTransferableAmount"];
        }
        public virtual string GetMaximumTransferableAmount()
        {
            return ConfigurationManager.AppSettings["maximumTransferableAmount"];
        }
I want to mock  up MaxTransferableAmount  and MinTransferableAmount rather than reading then from app.config, how to do that?

Thanks.

Emanuele DelBono

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Nov 9, 2015, 12:27:17 PM11/9/15
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Since ConfigurationManager is static you cannot mock it.
So you have 2 possible solutions:
- Encapsulate ConfigurationManager inside a class that implement an interface
- Explicitly set the value that you need in your test
     ConfigurationManager.AppSettings["minimumTransferableAmount"] = "42"; )


bye


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Hui Zhao

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Nov 9, 2015, 4:37:46 PM11/9/15
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I tried the second one but why it is not working.
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