如何为Spring Cloud Contract测试Multipart API编写Groovy DSL脚本

Question

我正在尝试编写DSL Groovy脚本来测试支持多部分的API。这是我的API合同：

PostMapping(value = "/application"  + "/{applicationNumber}",
        consumes = MediaType.MULTIPART_FORM_DATA_VALUE,
        produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
LoanDecisionResponseDto updateLoanApproval(
        @PathVariable("applicationNumber") String applicationNumber,
        @RequestPart("approval") DecisionRequestDto loanDecisionRequestDto,
        @RequestPart("attachments") MultipartFile[] attachments);

这是我尝试编写的DSL Groovy脚本：

Contract.make {
request {
    method POST()
    url '/lending-decisioning/applications/LOAN_APP_NO_NOT_FOUND_FOR_UPDATE_LOAN_APPROVAL'
    headers {
        header 'Channel': 'Channel.Web'
        header 'Content-Type': 'multipart/form-data'
        header 'Consume': 'application/json'
    }

/** I don't know how to write this part... **/
    multipart(
        approval: '{"status": "anyName", "reason": "1.0"}',
        multipartFile: named(

        )
    )
}
response {
    status 500
    headers {
        contentType('application/json;charset=UTF-8')
    }
}

由于我是Spring Cloud Contract测试的新手。请帮助我填写多部分内容。