Hello, One of our provider send a JSON like

{
  "level": 0,
}

But suddenly, they changed the

level

value to

2

which broke our consumer. Is this something we should verify with a contract test?

Have a read of this: https://docs.pact.io/consumer/contract_tests_not_functional_tests

An example of going from something like

{"level": 0}

to `{"level": "OFF"}`where you have a possibly unexpected different type due to a change stringifying an enum would be a valid use case, done that one before 🙂

The type is the same, but the value is inconsistent, it doesn't make sense to have

level: 2

on the first level of the object. IMHO that sound like Does the provider return the expected response? So we should enfore the value for this level

If you expect level 0 to be the response for a particular shaped request, then you need to ensure the provider always does so, you usually telegraph this via a provider state