GH-87 :: fix a sign in widget view component unit test

src/TrainingGuides.Web.Tests/Features/Membership/Widgets/SignIn/SignInWidgetViewComponentTests.cs

@@ -76,6 +76,7 @@ public async Task BuildWidgetViewModel_WhenUserSetsRedirectPage_SetsRedirectUrl_
     [Fact]
     public async Task BuildWidgetViewModel_WhenUserDoesNOTSetRedirectPage_SetsRedirectUrl_ToRoot()
     {
+        httpRequestServiceMock.Setup(x => x.GetBaseUrlWithLanguage()).Returns(ROOT_URL);
         var viewModel = await viewComponent.BuildWidgetViewModel(referenceProperties);
         Assert.Equal(ROOT_URL, viewModel.RedirectUrl);
     }