How to Test Dynamic JSON Responses

[Vineeth Menon]

Hi,

I've got a set of API's which returns a set of data (JSON format). 95% of the data is static and the rest of the data would change every minute or so, and I need to test these API's. The requirements are
1. Check if the key-value pair are matching (assert) for the static part of the data.
2. Check if the key(s) are present in the dynamic part of the data.

I did look around in Jackson and simpleJsonParser but could not find anything. Is there any library which helps me to do this? Or would I have to write the logic for this from scratch?

Thanks

[K. Tsang]

Are you planning to check directly as JSON string or after your convert to an object/class?

The static part is simply one-to-one mapping but the dynamic part can be a Map<String,Object> or Map<String,String> in that class.

[Rob Spoor]

For which Jackson has annotations JsonAnyGetter and JsonAnySetter. For example:

public class MyClass {
    // regular fields could come here
    private final Map<String, Object> unknownProperties = new HashMap<>();

    // regular getters/setters could come here

    // this method is not necessary if you're only receiving responses
    @JsonAnyGetter
    public Map<String, Object> getUnknownProperties() {
        return unknownProperties;
    }

    @JsonAnySetter
    public void setUnknownProperty(String name, Object value) {
        unknownProperties.put(name, value);
    }
}

Note that the value type can be more specific if needed, for instance Integer, String or even a custom class. Just make sure to match this in the field and two methods