WARN: Ignoring unsupported matching rules while verifying pact using pact-python

Question

I'm new to Pact and I am trying to verify a pact on provider side using pact-python but some matching rules are getting ignored.

WARN: Ignoring unsupported matching rules {"$.num_issues"=>{"matchers"=>[{"match"=>"integer"}], "combine"=>"AND"}, "$.error"=>{"matchers"=>[{"match"=>"type"}], "combine"=>"AND"}, "$.response[0].issue_id"=>{"matchers"=>[{"match"=>"type"}], "combine"=>"AND"}, "$.response[0].msg"=>{"matchers"=>[{"match"=>"type"}], "combine"=>"AND"}, "$.response[0].similar_fix_found"=>{"matchers"=>[{"match"=>"type"}], "combine"=>"AND"}, "$.response[1].issue_id"=>{"matchers"=>[{"match"=>"type"}], "combine"=>"AND"}, "$.response[1].msg"=>{"matchers"=>[{"match"=>"type"}], "combine"=>"AND"}, "$.response[1].similar_fix_found"=>{"matchers"=>[{"match"=>"type"}], "combine"=>"AND"}} for path ['body']

Consumer is Java based API and Provider is a Python based API.

                    "body": {
                        "$.num_issues": {
                            "matchers": [
                                {
                                    "match": "integer"
                                }
                            ],
                            "combine": "AND"
                        },
                        "$.error": {
                            "matchers": [
                                {
                                    "match": "type"
                                }
                            ],
                            "combine": "AND"
                        },
                        "$.response[0].issue_id": {
                            "matchers": [
                                {
                                    "match": "type"
                                }
                            ],
                            "combine": "AND"
                        },
                        "$.response[0].msg": {
                            "matchers": [
                                {
                                    "match": "type"
                                }
                            ],
                            "combine": "AND"
                        },
                        "$.response[0].similar_fix_found": {
                            "matchers": [
                                {
                                    "match": "type"
                                }
                            ],
                            "combine": "AND"
                        },
                        "$.response[1].issue_id": {
                            "matchers": [
                                {
                                    "match": "type"
                                }
                            ],
                            "combine": "AND"
                        },
                        "$.response[1].msg": {
                            "matchers": [
                                {
                                    "match": "type"
                                }
                            ],
                            "combine": "AND"
                        },
                        "$.response[1].similar_fix_found": {
                            "matchers": [
                                {
                                    "match": "type"
                                }
                            ],
                            "combine": "AND"
                        }
                    }
                }
            }
        }
    ],
    "metadata": {
        "pact-specification": {
            "version": "3.0.0"
        }
    }

Changing the pact-specification version to 2.0.0 by hand also didn't work as required.

Can anyone suggest something..?

Answer 1

You need to explicitly set the specification version in the Java consumer test.

For example, in a JUnit test you can do it like so:

@PactTestFor(providerName = "pactflow-example-provider-java-kafka", providerType = ProviderType.ASYNCH, pactVersion = PactSpecVersion.V2)

The matchers and structure of the pact file differs based on the version, so just changing the version in the pact after won't help.