Hey Looking for a way to share interaction setup between our Pact Foundation #pact-net

Hey, Looking for a way to share interaction setup...

Eddie Stanley

04/20/2023, 8:48 PM

Hey, Looking for a way to share interaction setup between our (consumer) contract tests and other functional tests in the consumer application in the form of
HttpRequestMessage
/
HttpResponseMessage
pairs. NB: I'm aware of

pact-stub-server

(link) however it's not quite what I'm looking for. i.e. assume we've got some shared code to define the "Foo" interaction

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private static void PopulateFooInteraction(IPactBuilderV3 pactBuilder)
{
    pactBuilder
        .UponReceiving("Request For Foo")
        .WithRequest(HttpMethod.Get, "/foo/endpoint")
        .WithHeader("x-correlation-id", "55dbb0b0-b0a0-4b2c-bee2-1cc77e8fba56")
        .WillRespond()
        .WithStatus(HttpStatusCode.OK)
        .WithHeader("Content-Type", "application/json")
        .WithJsonBody(Match.Type(new
        {
            Foo = "Bar"
        }));
}

Then we exercise the client code that depends on the Foo interaction - it calls

PopulateFooInteraction()

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[Fact]
public async Task CheckFooInteraction()
{
    var pact = Pact.V3("The.Consumer", "The.Provider", new PactConfig());
    var pactBuilder = pact.UsingNativeBackend();
    PopulateFooInteraction(pactBuilder);
    await PactBuilder.VerifyAsync(async ctx =>
    {
        // .. code that consumes the stubbed responses coming back for Foo
    });
}

Finally (somehow!) we harvest the messages implied by

PopulateFooInteraction()

This is the missing bit

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[Fact]
public void GetMessages()
{
    var messageCapture = new MessageCapture();
    PopulateFooInteraction(messageCapture);
    IEnumerable<(HttpRequestMessage, HttpResponseMessage)> messages = messageCapture.CollectInteractions();
}

The end goal being to use these messages with something like mockhttp.

Matt (pactflow.io / pact-js / pact-go)

04/21/2023, 1:31 AM

Perhaps the simplest way would be to read back in the pact file, and programmatically create the

mockhttp

mocks?

Timothy Jones

04/22/2023, 4:09 AM

What’s the use case here?

Timothy Jones

04/22/2023, 4:10 AM

Ah, I think I understand - you want to tie the mocks in your functional tests together with the assertions in your contract tests?

💯 1

Timothy Jones

04/22/2023, 4:11 AM

I’ve thought about doing something like that - I spoke about a rudimentary approach (using javascript) in the Pact virtual conference a couple of years ago - I’m travelling at the moment, but I can post a link later

Timothy Jones

04/22/2023, 4:12 AM

I don’t think there’s existing tooling to do this easily, but it would be worth building.

Timothy Jones

04/22/2023, 4:25 AM

I think one neat way to implement it might be to have a way to say “this interaction also triggers these state changes”

Timothy Jones

04/22/2023, 4:25 AM

Then you could use the mock server for your functional tests

Timothy Jones

04/22/2023, 4:26 AM

(And you might be able to use the mock client that way, too)

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