CODEWITHSUNDEEP
asp.netunit-testingasp.net-web-apimoqxunit
WhatTheDeuce
WhatTheDeuce

Reputation: 143

How can I unit test a method that calls a method in a base class?

I am using Moq to pass dependencies to the class I need to test. This is the constructor and method to test:

public class PosPortalApiService : PosPortalApiServiceBase, IPosPortalApiService {


    private readonly string _apiEndpoint;

    public PosPortalApiService ( IDependencyResolver dependencyResolver,
                                 IOptions<AppSettings> appSettings ) : base    ( dependencyResolver ) {
        _apiEndpoint = appSettings.Value.ApiEndpoint;
    }

public async Task<IEnumerable<IStore>> GetStoresInfo ( string userId ) {
        var endpoint = GetEndpointWithAuthorization(_apiEndpoint + StoresForMapEndpoint, userId);
        var encryptedUserId = EncryptionProvider.Encrypt(userId);

        var result = await endpoint.GetAsync(new {
            encryptedUserId
        });

        return JsonConvert.DeserializeObject<IEnumerable<Store>>(result);
    }

GetEndpointWithAuthorisation is in the base class, it calls the DB. How can i approach testing this? I have the following so far:

[Fact]
    public void GetStoresInfoReturnsStoresForUser()
    {

        var mockHttpHandler = new MockHttpMessageHandler();
        var mockHttpClient = new HttpClient(mockHttpHandler);
        //mockHttpHandler.When("http://localhost/api/select/info/store/*")
        //                .Respond("application/json",  );
        AppSettings appSettings = new AppSettings() { ApiEndpoint = "http://localhost" };
        var encryptedUserId = EncryptionProvider.Encrypt("2");                       
        var mockDependancyResolver = new Mock<IDependencyResolver>();

        var mockIOptions = new Mock<IOptions<AppSettings>>();
        IOptions<AppSettings> options = Options.Create(appSettings);
        //Arrange
        PosPortalApiService ApiService = new PosPortalApiService(mockDependancyResolver.Object, options);

        var sut = ApiService.GetStoresInfo("2");

It runs though until the base method call. Should I be providing a Mock response somehow? How would you do approach this test? Thanks.

Upvotes: 0

Views: 93

Answers (1)

John Wright
John Wright

Reputation: 4607

You can mock the method in the base class (assuming it's either virtual or abstract) by making the PosPortalApiService object a partial mock. (Partial mocks will use the real class behavior except for the parts you mock out). You do this by setting CallBase = true on the mock object;

var ApiServiceMock = new Mock<PosPortalApiService>(mockDependancyResolver.Object, options) 
                    {CallBase = true};

ApiServiceMock.Setup(x => x.GetEndpointWithAuthorisation(It.IsAny<string>(), It.IsAny<string>())
              .Returns(someEndpointObjectOrMockYouCreatedForYourTest);

PosPortalApiService ApiService = ApiServiceMock.Object;
var sut = ApiService.GetStoresInfo("2");

Upvotes: 1

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