public void NonExistingFileName()
{
const string fileName = "Some.file";
_handler.Handle(fileName);
// Call to Upload.
_logger.Received(1).LogExec(Arg.Any <Expression <Func <bool> > >());
// Error logging.
_logger.Received(1).LogInfo(FileUploadHandler.FileCannotBeFoundErrMsg(fileName));
Assert.That(_handler.IsHandled, Is.False);
}