空手道DSL：如何检查JSON对象是否是可选的，但是如果该对象中的键应该是正确的模式？

Question

我想验证一个JSON模式，其中嵌套JSON响应中的对象是可选的，但如果该对象出现，则该对象中的键也应该出现。

样本回应：-

{
    "id" : "1234",
    "targetPhoneNumber" : "1234",
    "paid" : { //optional
      "units" : "asd", //mandatory if the paid object is coming
      "amount" : 12.00 //mandatory if the paid object is coming
    },
    "date" : "2019",
    "boolean" : false,
    "transactionId" : "1234"
  }

我需要对这些案例进行模式检查。

1） 如果付费对象即将到来，它应该是一个JSON对象，并且应该包含字符串形式的单位和强制的金额。2） 如果付费对象仍不存在，则模式验证应通过。

Answer 1

可以使用条件语句来执行此操作：

* def outerMatcher =
"""
{
"id" : "#string",
"targetPhoneNumber" : "#string",
"paid" : "##object",
"date" : "#string",
"boolean" : "#boolean",
"transactionId" : "#string"
}
"""

* def paidMatcher =
"""
{
  "units": "#string",
  "amount": "#number"
}
"""

* def innerMatcher = karate.match(response.paid, "#object").pass ? paidMatcher : "#notpresent"

* match response == outerMatcher
* match response.paid == innerMatcher

Answer 2

结合“自我”验证表达式和karate.match（实际的，预期的）应用编程接口给出了实现这一点的一些方法，

这应该行得通，

* def schema =
"""
{
      "boolean": "#boolean",
      "date": "#string",
      "id": "#string",
      "paid": "##object? karate.match(_,{\"amount\": \"#number\",\"units\": \"#string\"}).pass",
      "targetPhoneNumber": "#string",
      "transactionId": "#string"
}
"""

如果您不想添加子模式内联/如果子模式太大，您可以尝试以下方法

* def passSchema =
"""
{
    "amount": "#number",
    "units": "#string"
}
"""
* def schema =
"""
{
    "boolean": "#boolean",
    "date": "#string",
    "id": "#string",
    "paid": "##object? karate.match(_,passSchema).pass",
    "targetPhoneNumber": "#string",
    "transactionId": "#string"
}
"""

简单的JSON模式：

{
      "boolean": "#boolean",
      "date": "#string",
      "id": "#string",
      "paid": "##object? karate.match(_,{\"amount\": \"#number\",\"units\": \"#string\"}).pass",
      "targetPhoneNumber": "#string",
      "transactionId": "#string"
}