.NET Core Moq Params array in setup

Question

I am trying to use Moq to mock a reponse from a method which uses the params keyword with an int array

public interface IValidationHelper
{
    Task<bool> ValidateParents(params int?[] parents);
}

I am findning myself having to mock it in two ways to get it to properly mock. First, with a single param, and second, with two params. Is there a way to specify something like params in a It.IsAny in the Setup?

private void MockValidateParents(bool valid = true)
{
    _validationHelper.Setup(x => x.ValidateParents(
        It.IsAny<int>()
    )).ReturnsAsync(valid);

    _validationHelper.Setup(x => x.ValidateParents(
        It.IsAny<int>(),
        It.IsAny<int>()
    )).ReturnsAsync(valid);
}

this might be the answer: https://stackoverflow.com/questions/7968052/setup-method-with-params-array — Martin Staufcik, Aug 08 '19 at 20:18

score 4 · Accepted Answer · answered Aug 08 '19 at 20:19

4

I think you need to tell the mock that it is any array that it can take:

_validationHelper.Setup(x => x.ValidateParents(
    It.IsAny<int?[]>()
)).ReturnsAsync(valid);

Instead of telling it all the single inputs.

answered Aug 08 '19 at 20:19

Kristian Barrett

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.NET Core Moq Params array in setup

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