Add pact-messaging example

[schustes]

Hello there,

first of all, a great framework and an excellent list of examples.
I managed to convert a pact rest contract into a spring contract as given in the example.

I'm trying to do the same for a message contract. The contract gets downloaded but then an error is thrown when the test generation starts. My base test class is annotated with AutoConfigureMessageVerifier

The exception sounds as if it is attempted to convert a rest contract:
Caused by: java.lang.NullPointerException: Cannot get property 'serverValue' on null object at org.springframework.cloud.contract.verifier.builder.JUnitMessagingMethodBodyBuilder.validateResponseHeadersBlock(JUnitMessagingMethodBodyBuilder.groovy:138)
I'm certainly missing something here, but have no clue what. Any hints?

[OlgaMaciaszek]

There is no so far. Once this spring-cloud/spring-cloud-contract#796 gets fixed, a sample should be added as well.