I have a method like this. Can you help with an example unit test that will cover the rows?

@ApiImplicitParam(name = "Authorization", value = "JWT Token", required = true, dataType = "string", paramType = "header", example = Constants.SAMPLE_JWT_TOKEN)
            @ApiOperation(value = "Mail information services", notes = "This method shows you thats sending summary mail info.")
            @PostMapping(value = "/information", produces = "application/json")
            public ResponseEntity<MailInfoResponse> mailInfo(
                    @Valid @RequestHeader(value = "ticketId", required = true) @ApiIgnore String ticketId,
                    @Valid @RequestHeader(value = "user", required = true) @ApiIgnore String user,
                    @RequestBody MailInfoRequest request) {
        
                request.setTicketId(ticketId);
                request.setAuthUser(user);
                log.info("New Mail Info Report request:{}", request);
        
                List<MailInfoParams> responseInfo = this.mailService.getMailInfo(request);
                MailInfoResponse response = new MailInfoResponse();
                response.setMailInfoParams(responseInfo);// mailInfoParams must not be NULL !!!
                response.setStatus(StatusType.SUCCESS.toString());          
                response.setStatusCode(ErrorType.SUCCESS.getResultCode());
                if (responseInfo.isEmpty()) {
                    response.setStatusDescription(ErrorType.MAIL_INFO_NOT_FOUND.getResultDesc());
                } else {
                    response.setStatusDescription("");
                }
                return ResponseEntity.accepted().body(response);
            }

StatusType.SUCCESS -> “SUCCESS”
ErrorType.MAIL_INFO_NOT_FOUND -> 100