I'm trying to write an integration test with mockmvc, but I'm getting an error. While startDate and endDate, which I receive as request param, normally work without any problems, I get the following error in the test; MethodArgumentTypeMismatchException
My controller
 @GetMapping("/")
    public ResponseEntity<List<TransactionDto>> getTransactionByDateRange(@RequestParam LocalDate startDate,
                                                                          @RequestParam  LocalDate endDate) {
        logger.info("Get transaction request received with date range, start date: {} and end date: {}",
                startDate,
                endDate);
        List<TransactionDto> transactionDtoList = transactionService.findTransactionByDateRange(startDate,endDate);
        if(transactionDtoList.isEmpty()){
            throw new TransactionListIsEmptyException("No transaction data can be found in this date range. " +
                    "Please check the date range you entered.");
        }
        return new ResponseEntity(Response.ok().setPayload(transactionDtoList), HttpStatus.OK);
    }
My Test
@Test
    public void testfindTransactionByDateRange_whenTransactionsAreExists_ShouldReturnTransactionDtoList() throws Exception {
        //given
        LocalDate startDate = LocalDate.of(2020,10,5);
        LocalDate endDate = LocalDate.now();
        Transaction transaction = transactionRepository.save(generateTransaction());
        Transaction transaction2 = transactionRepository.save(generateTransaction());
        Transaction transaction3 = transactionRepository.save(generateTransaction());
        transactionService.createTransaction(transaction);
        transactionService.createTransaction(transaction2);
        transactionService.createTransaction(transaction3);
        List<Transaction> transactionList = new ArrayList<>();
        transactionList.add(transaction);
        transactionList.add(transaction2);
        transactionList.add(transaction3);
        List<TransactionDto> expected = converter.convertList(transactionList);
        //when
        //then
        this.mockMvc.perform(get(TRANSACTION_API_ENDPOINT)
                        .queryParam("startDate","10.10.2015")
                        .queryParam("endDate","10.10.2015"))
                .andExpect(status().is2xxSuccessful())
                .andExpect(content().contentType(MediaType.APPLICATION_JSON));
    }