Pact Foundation

Hi,

Should `fromProviderState` be flexible about matcher's type?

Currently if I want to use `regex` matcher with `ProviderState` generator, I have to define a custom method like this:

```export function regexFromProviderState(
    expression: string,
    regex: string,
    exampleValue: string
) {
    return {
        'pact:matcher:type': 'regex',
        'pact:generator:type': 'ProviderState',
        expression,
        value: exampleValue,
        regex
    };
}```
I think it will be the same with other matchers.

I’m not sure what you’re trying to do here?

currently matcher `type` is hard coded <https://github.com/pact-foundation/pact-js/blob/master/src/v3/matchers.ts>. if I use it like this:

```pact.addInteraction({
        states: [{ description: 'A user' }],
        uponReceiving: 'get one user',
        withRequest: {
            method: 'GET',
            path: fromProviderState('${iri}', '/api/users/14f6626f-c51e-4311-ac52-182c8f2a7634')
        },
        willRespondWith: {
            status: 200,
            body: {
                id: '14f6626f-c51e-4311-ac52-182c8f2a7634'
            },
        },
    });```
mock server will match with *any* GET request, not with only request with regex that I want `'^\/api\/users\/[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}$'`

```        'pact:matcher:type': 'regex',
        'pact:generator:type': 'ProviderState',```
Is this valid?

yes it's valid. I tried it in my personal project

Doesn’t the mock server match `'/api/users/14s....'` etc?

I thought it was either the string you provide, or the example from the provider state

I tried on my project, it match any `string` . For example `GET /any` it still match

The lack of composability in the matchers is one of the things that make me kick off the ContractCase project - where the matchers are fully composable

If you can indeed add a generator like in your example, then I think yes, it’s worth exposing that in the DSL somehow

Let me create a demo project for this bug and then report it

Here is the demo project <https://github.com/tienvx/test-from-provider-state-generator/blob/main/src/client.test.ts#L34>

Here is the ticket <https://github.com/pact-foundation/pact-js/issues/1088>

I created it as if I am a user, not contributor, so it's easier to read (I think)