public async Task CountAllPrivateCustomers_Returns_Right_Number_Of_PrivateCustomers() { var CompanyCustomerMock = new Mock <IDelpinHttpClientHandler <CompanyCustomer> >(); var PrivateCustomerMock = new Mock <IDelpinHttpClientHandler <PrivateCustomer> >(); var BookingMock = new Mock <IDelpinHttpClientHandler <Booking> >(); int NumberOfPrivateCustomers = 5; PrivateCustomerMock.Setup(m => m.GetCountHttp(It.IsAny <string>(), It.IsAny <string>())) .ReturnsAsync(NumberOfPrivateCustomers); var sut = new StatisticController(Configuration(), PrivateCustomerMock.Object, CompanyCustomerMock.Object, BookingMock.Object); var countPrivateCustomers = await sut.CountAllPrivateCustomers(); Assert.Equal(NumberOfPrivateCustomers, countPrivateCustomers); }