pact-jvm-provider-spring-mvc json4s exception - spring

Question

Just trying to understand pact. We are using spring boot, so naturally I went to trying simple setup using pact-jvm-provider-spring-mvc.
My pact file is a simple
{
"consumer": {
"name": "MyConsumer"
},
"provider": {
"name": "MyProvider"
},
"interactions": [
{
"description": "a request for projects",
"providerState": "i have a list of projects",
"request": {
"method": "GET",
"path": "/dogs",
"headers": {
"Accept": "application/json"
}
},
"response": {
"status": 200,
"headers": {
"Content-Type": "application/json"
},
"body": [
{
"dog": "1"
}
]
}
}
],
"metadata": {
"pactSpecification": {
"version": "2.0.0"
}
}
}
I added these dependencies to my gradle build:
```
testCompile group: 'com.reagroup', name: 'pact-jvm-provider-spring-mvc_2.10', version: '0.4.0'
testCompile group: 'au.com.dius', name: 'pact-jvm-provider_2.10', version: '2.4.18'
testCompile group: 'au.com.dius', name: 'pact-jvm-provider-junit_2.11', version: '3.4.1'
```
The test class doesn't do much, just creates a controller in spring fashion.
But what I get from running it is
```
org.json4s.package$MappingException: Case classes defined in function bodies are not supported.
at org.json4s.reflect.package$.fail(package.scala:96)
at org.json4s.reflect.Reflector$ClassDescriptorBuilder$$anonfun$9.apply(Reflector.scala:115)
at org.json4s.reflect.Reflector$ClassDescriptorBuilder$$anonfun$9.apply(Reflector.scala:115)
at scala.util.control.Exception$Catch$$anon$2.apply(Exception.scala:137)
at scala.util.control.Exception$Catch$$anon$2.apply(Exception.scala:135)
at scala.util.control.Exception$Catch.apply(Exception.scala:106)
at org.json4s.reflect.Reflector$ClassDescriptorBuilder.constructorsAndCompanion(Reflector.scala:115)
at org.json4s.reflect.Reflector$ClassDescriptorBuilder.result(Reflector.scala:156)
at org.json4s.reflect.Reflector$.createDescriptor(Reflector.scala:50)
at org.json4s.reflect.Reflector$$anonfun$describe$1.apply(Reflector.scala:44)
at org.json4s.reflect.Reflector$$anonfun$describe$1.apply(Reflector.scala:44)
at org.json4s.reflect.package$Memo.apply(package.scala:39)
at org.json4s.reflect.Reflector$.describe(Reflector.scala:44)
at org.json4s.Extraction$.extract(Extraction.scala:330)
```
It seems like a bug in the underlying jar file which is resolved. But I am just wondering if this is the right approach, can I simply bump the jar version for json4s?
The pact-jvm-provider-spring-mvc is not touched in a while, and the 0.5.0 version never released. Again note that I don't need spring-mvc. I just want to test Pact against my rest api.
I thought there might be another way of doing this.

Answer 1

Make sure the request body matches what the api expects.
I've gotten similar errors (but from jackson) when that was the case.