Mock target endpoint response while testing Apigee...

Ian22

I am developing API proxies in VS Code and testing them using the Apigee Emulator ( apigee-emulator-1.9.4 ), mocha and pactumJS. I would like to avoid having an Assign Message policy that returns dummy data for test purposes, because I would like to keep my code clean for production and also be able to test different request and response payloads without having to define several AMs.

My proxy will call a target endpoint and receive a response, which is then validated in a JS policy. In my tests, I am trying to mock the endpoint and get a predefined response back, using host: localhost/{path} and port:3000 , but I'm getting a 503 error back, with these details:

"body": {
"fault": {
"faultstring": "The Service is temporarily unavailable",
"detail": {
"errorcode": "messaging.adaptors.http.flow.ServiceUnavailable",
"reason": "TARGET_CONNECT_CONNECTION_REFUSED"
}
}
}

I think the mock server is working, as I get this message in the execution:
"[I] Mock server is listening on http://localhost/{path}:3000" . I have also defined the mock interaction.

Can someone point me to the correct way of doing this?

dchiesa1

Well for one thing, Using a host of localhost/{path} seems wrong. It wants a hostname, not a hostname and a path.

Ian22

Thanks for the reply. I have updated the mocked host to be http://localhost , use port 3000 , and I have removed any path, so it's making a direct POST to localhost . This is what the target endpoint uses:
<HTTPTargetConnection>
<URL>http://localhost</URL>
<Port>3000</Port>
</HTTPTargetConnection>

I still get the same error, " The Service is temporarily unavailable", "TARGET_CONNECT_CONNECTION_REFUSED".

My other mocked interaction (a direct GET request on localhost, without any path) works fine.
It could be that Pactum can only mock a direct call, and not a call that is done later by the proxy. This is where I could use some help from anyone who has successfully done this, perhaps using another test library/framework.

PS: Why was this marked automatically as a solution and claimed that I was the one who marked it?

Mock target endpoint response while testing Apigee with Emulator