RestSharp Unit Test NUnit Moq RestResponse null reference exception

Question

I'm having some challenges trying to use Moq with RestSharp. Maybe it's it my misunderstanding of Moq but for some reason I keep on getting a null reference exception when trying to Mock a RestResponse.

Here is my unit test.

    [Test]
    public void GetAll_Method_Throws_exception_if_response_Data_is_Null()
    {
        var restClient = new Mock<IRestClient>();

        restClient.Setup(x => x.Execute(It.IsAny<IRestRequest>()))
            .Returns(new RestResponse<RootObjectList>
            {
                StatusCode = HttpStatusCode.OK,
                Content = null
            } );

        var client = new IncidentRestClient(restClient.Object);

        Assert.Throws<Exception>(() => client.GetAll());
    }

Here is my actually implementation:

public class IncidentRestClient : IIncidentRestClient
{
    private readonly IRestClient client;
    private readonly string url = "some url here";

    public IncidentRestClient()
    {
        client = new RestClient { BaseUrl = new Uri(url) };
    }

    public RootObjectList  GetAll()
    {
        var request = new RestRequest("api/now/table/incident", Method.GET) { RequestFormat = DataFormat.Json };
        request.OnBeforeDeserialization = resp => { resp.ContentType = "application/json"; };

        IRestResponse<RootObjectList> response = client.Execute<RootObjectList>(request);

        if (response.Data == null)
            throw new Exception(response.ErrorException.ToString());

        return response.Data;
    }
}

For some reason response object is null. Could it be I'm mocking the return object incorrectly?

What is the "IncidentRestClient?" Is it a type you have defined? — Sean H, May 11 '15 at 14:59
Hi Sean. Yes, it's a type I've defined.. please see edit above. — jaypman, May 11 '15 at 15:17
It looks like the constructor of your `IncidentRestClient` doesn't take a `IRestClient` as a parameter. Is there another constructor defined that takes that parameter? — Marc Harry, May 11 '15 at 16:13

score 13 · Answer 1 · answered May 11 '15 at 16:24

13

For disclosure purposes, I am assuming that your IncidentRestClient has a constructor that takes an IRestClient instance as a parameter and uses it to set the client member.

It looks like, in your test, you are running Setup for a different overload of Execute than the one you are using. Instead of:

.Setup(x => x.Execute(

try:

.Setup(x => x.Execute<RootObjectList>(

answered May 11 '15 at 16:24

Sean H

736
6
9

Hi Sean. Thank you so much!! :) I can't believe I overlooked this overload in the Setup. I now get a RestReponse object back. – jaypman May 11 '15 at 20:05
Yes, it has contructor public IncidentRestClient(IRestClient client) { this.client = client; } – jaypman May 11 '15 at 20:14
2

@jaypman You should accept this answer if it was correct/helpful. An upvote would be nice to. That's how this works. – Todd Menier May 16 '15 at 14:36
@ToddMenier I cannot upvote at the moment b/c it says I need at least 15 reputation points. – jaypman May 27 '15 at 13:06

RestSharp Unit Test NUnit Moq RestResponse null reference exception

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