public async Task GetByCoordinates_WhenPartnerDoesNotExists_ShouldReturnNotFound() { // Arrange var request = new CoordinatesRequest() { Latitude = 10, Longitude = 30 }; _mediator.Send(Arg.Any <GetPartnerByCoordinatesQuery>()).Returns(default(Partner)); // Act var response = await _controller.GetByCoordinates(request); // Assert response.Should().NotBeNull().And.BeOfType <NotFoundObjectResult>(); }