public async Task GetAddressesByStreetShouldReturnOkIfFoundInDatabase() { // Arrange var street = "Ciasna"; var address = new Address() { Id = 1, Country = "Polska", City = "Sopot", Street = street, BuildingNumber = "1", FlatNumber = "69", PostalCode = "80-765" }; mockRepo.Setup(x => x.Address).Returns(_addressRepoMock.Object); _addressRepoMock.Setup(x => x.GetAddressByStreet(street)).ReturnsAsync(new[] { address }); // Act var result = await _sut.GetAddressesByStreet(street); // Assert Assert.IsType <OkObjectResult>(result); Assert.IsNotType <NotFoundResult>(result); }