英文:
How to write Pact contract that matches to key 'x' either object of type Y or Z
问题
以下是您要求的翻译内容：
我尝试编写一个 Pact 契约测试，涵盖以下场景。我有一个消费者调用 GET 方法来接收有关动物（猫或狗）的信息。
response1:
{
"animal" : {
"type" : "Cat",
"meow" : true
}
}
response2:
{
"animal" : {
"type" : "Dog",
"barks" : false
}
}
在代码中，猫和狗都是 Animal 类的子类型。是否有可能编写一个契约，期望响应包含 "animal" 键，其值匹配猫（期望属性 "meow" 和 "type"）或狗（期望属性 "barks" 和 "type"）。
换句话说，是否有可能在 Pact 的 DSL 中声明在 "animal" 键下可以是定义 X 的对象或定义 Y 的对象？
英文:
I try to write a pact contract test covering following scenario. I have a consumer calling an GET to receive an information about an animal, either a cat or dog.
response1:
{
"animal" : {
"type" : "Cat",
"meow" : true
}
}
response2:
{
"animal" : {
"type" : "Dog",
"barks" : false
}
}
In code both Cat and Dog are subtypes of an Animal class. Is there a possibility to write a contract expecting response to contain "animal" key with value matching either cat (expecting properties "meow" and "type") or dog (expecting properties "barks" and "type").
In other words. Is there a possibility inn Pact's Dsl to declare that under the key "animal" there can be either an object of definition X or an object of definition Y?
答案1
得分: 1
不，您必须编写两个单独的测试来涵盖这种情况，以证明您的代码实际上可以处理这两种情况。想象一下，如果您编写了一个单元测试，以Animal作为参数，但根据动物的不同而表现不同 - 您需要测试所有的变体。
这个论点类似于为什么我们不支持可选属性（参见https://docs.pact.io/faq/#why-is-there-no-support-for-specifying-optional-attributes）。
英文:
No, you have to write two separate tests to cover this scenario to prove that your code can actually handle both cases. Think of if you were to write a unit test that took an Animal as an argument, but behaved differently depending on the animal - you'd need to test it with all of the variants.
The argument is similar to why we don't support optional attributes (see https://docs.pact.io/faq/#why-is-there-no-support-for-specifying-optional-attributes).
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