Pact Foundation

Hi :slightly_smiling_face:
Is it possible to specify a header exists in an HTTP response (without value matching) using `PactBuilder` (V4)?

There is a V4 notEmpty matcher that will do that.

I don't think any of the current DSLs allow setting that matcher for a header, though.

Actually, the new request and response builders can set that.

Hi <@U5FCZAAUU> thank you for your answer!
I am looking at `HttpResponseBuilder.kt` version 4.4.5 and can not see an overload with matcher

Am I missing something?

Ah! It's missing. I have added it, it should be available in the next release

Hi <@U5FCZAAUU> :slightly_smiling_face: where can I find documentation about this feature?
I am using 4.4.7 and can not define the existence of a header using `PactBuilder`

When you say "can not define the existence of a header", what do you mean? By adding a header to a Pact interaction means it has to exist otherwise the verification will fail.

Hi <@U5FCZAAUU> thank you for your answer :slightly_smiling_face:  I want to add a header but do not care about its content.

For example, I expect `x-request-id` header to be present but I do not know or care about its value.

There is a notEmpty matcher, but I have never tested that with headers, and I don't think the DSL lets you supply any matcher for the headers. You could use a simple regex like `.+`

I did not find a `header` method that accepts a matcher or regex string in the DSL, have I missed something?

Hi <@U5FCZAAUU> I am using version `4.4.7` and can not find that definition in `HttpRequestBuilder.kt` .

I could also not find `matchHeader`definition in `4.4.8` <https://github.com/pact-foundation/pact-jvm/blob/4_4_8/consumer/src/main/kotlin/au/com/dius/pact/consumer/dsl/HttpRequestBuilder.kt|here>...
Am I missing something?

Oh, sorry, that's right. With the new DSL you can use a matching function with the methods, so you should be able to use the notEmpty matcher

```builder
      .header("A", regexp("\\d+", "111"))```

Or
```builder
      .header('A', notEmpty('111'))```

Those functions are found in `<http://au.com|au.com>.dius.pact.consumer.dsl.Matchers`