def "CreateOtp success with empty signers"() {
        given:
        def view = new OtpRequestView(id: "1")
        def customerId = "99018921"
        def loanId = "234CLAAAZN3412112"
        def userId = 12321

        def prepaymentSigners = new HashSet<PrepaymentSignersEntity>()
        def prepaymentEntity = new PrepaymentEntity(
                id: 1,
                userId: userId,
                customerId: customerId,
                contractNumber: loanId,
                altContactNumber: "K01/23",
                amount: BigDecimal.valueOf(50),
                prepaymentStatus: PrepaymentStatus.CREATED,
                createdAt: LocalDateTime.of(2019, 10, 10, 11, 10, 9),
                debitAccount: "asdfhshf",
                prepaymentSigners: prepaymentSigners
        )

        def otpResponse = new OtpCreateResponse(uuid: "adhash1234hahs")

        when:
        def result = prepaymentService.createOtp(view, customerId, userId)

        then:
        1 * prepaymentRepository.findByIdAndCustomerId(1, customerId) >> Optional.of(prepaymentEntity)
        1 * permissionClient.canSign(customerId, userId, prepaymentEntity.getDebitAccount(),
                Collections.emptyList()) >> true
        1 * otpClient.createOtp(prepaymentEntity.getUserId(), prepaymentEntity.getCustomerId()) >> otpResponse
        1 * prepaymentSignersRepository.save(_ as PrepaymentSignersEntity) >> {
            args ->
                def buildEntity = args.get(0)
                buildEntity.getUserId() == prepaymentEntity.getUserId()
                buildEntity.getSignStatus() == SignerStatus.CREATED
                buildEntity.getOtpUuid() == otpResponse.getUuid()
                buildEntity.getPrepayment() == prepaymentEntity
        }
        result != null
        result.getUuid() == otpResponse.getUuid()
    }