How can I do RegEx in Message Header

[IsaacHu]

I am aim to test a field "partitionKey" as RegEx "[A-Z]{3}", like "ABC01".
below code cannot add to "matchingRules" in contract, is there anyway in Pact can do that?

    MessagePact itsVesselCapacityUpdatePack(MessagePactBuilder builder) {
        //Map<String, String> headers = Map.of(MessageHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);
        Map<String, Object> headers = new HashMap<>();
        headers.put(MessageHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);
        headers.put("partitionKey", new RegexMatcher("[A-Z]{3}", "ABC01"));

        return builder
                .given("xxxxxxxxxx")
                .expectsToReceive("yyyyyyyyyyyyyyy")
                .withMetadata(headers)
                .withContent(event)
                .toPact();
    }

[uglyog]

Your regex is wrong, it also needs to match the values after the initial 3 letters. So [A-Z]{3}.* or [A-Z]{3}\\d+
Also make sure you are using the correct class, it should be au.com.dius.pact.core.model.matchingrules.RegexMatcher.

I've also added a metadata DSL class to make it easier to setup matching rules for message metadata, for instance,

.withMetadata(md -> {
    md.put(MessageHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);
    md.matchRegex("partitionKey", "[A-Z]{3}\\d+", "ABC01");
})

[uglyog]

Released 4.1.24 and 4.2.9