The SSE protocol has a slightly peculiar format and can't be easily tested with Pact today - whilst the protocol is text based, Pact doesn't understand the various tokens and therefore payloads would currently require exact matching, which is rather brittle.
SSE could be developed as a Content Matcher plugin and optionally a transport (the Asynchronous message type could easily model this interaction without a transport if needed)
https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#event_stream_format
The SSE protocol has a slightly peculiar format and can't be easily tested with Pact today - whilst the protocol is text based, Pact doesn't understand the various tokens and therefore payloads would currently require exact matching, which is rather brittle. SSE could be developed as a Content Matcher plugin and optionally a transport (the Asynchronous message type could easily model this interaction without a transport if needed) https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#event_stream_format
https://pact.canny.io/admin/board/feature-requests/p/plugin-server-sent-events