Expression references a method that does not belong to the mocked object

Question

I have an api service that calls another api service. When I set up the Mock objects, it failed with an error:

NotSupportedException: expression refer

Answer 1

Since the question about mocking IConfiguration is referring this answer as duplicate, I will contribute my dime here. This is how I "Mock" IConfiguration, which is, in my opinion, a bit cleaner:

    private static IConfiguration GetConfigurationMock(string jsonConfiguration)
    {
        var byteArray = Encoding.UTF8.GetBytes(jsonConfiguration);
        var stream = new MemoryStream(byteArray);

        var conf = new ConfigurationBuilder();
        conf.AddJsonStream(stream);
        var confRoor = conf.Build();

        return confRoor; 
    } 

Original question: How to setup Mock of IConfigurationRoot to return value