public void SearchWalk_WalkerNotFound_ReturnsNotFound()
{
// Arrange
var walker = DummyData.UserFaker.Generate();
_userRepository.GetBy(walker.Email).ReturnsNull(); //!
// Act
var result = _sut.SearchWalk(walker.Email);
// Assert
result.Should().BeOfType <NotFoundObjectResult>();
_userRepository.Received().GetBy(walker.Email);
_registrationRepository.DidNotReceive().GetLast(walker.Email);
_walkRepository.DidNotReceiveWithAnyArgs().GetByUserAndRoute(default, default);
