How to setup Mock of IConfigurationRoot to return value [duplicate]

Question

I have used IConfigurationRoute to access a directory like this.

if (type == "error") directory = _config.GetValue<string>("Directories:SomeDirectory"); 

_config is IConfigurationRoot injected in the constructor.

I tried the following way to mock it.

        var mockConfigurationRoot = new Mock<IConfigurationRoot>();         mockConfigurationRoot.Setup(c => c.GetValue<string>("Directories: SomeDirectory"))             .Returns("SomeDirectory")             .Verifiable();         var config = mockConfigurationRoot.Object; 

The issue is while running the test Xunit throws the exception saying

"System.NotSupportedException : Expression references a method that does not belong to the mocked object"

How can I solve this issue?

Answer 1

I did it using the SetupGet method as follows. It works for me, hope it helps.

_configurationRoot = new Mock<IConfigurationRoot>(); _configurationRoot.SetupGet(x => x[It.IsAny<string>()]).Returns("the string you want to return");