Mock External API - Interaction not exercised - api

Question

I have just started to use Pactum to unit test my API endpoints.
In one of my API endpoints, I am calling an external API and I have tried to mock this external API. My code clearly calls the external API.
However, my test fails and I get an error (the actual endpoint 32 is just a sample, it is not hardcoded in the actual codes):
Interaction not exercised: GET - https://62b32eab4f851f87f4563d9b.mockapi.io/user/32
Here is a sample of my test:
it('should update record', async () => {
await spec()
.post('http://localhost:3000/user')
.withJson({
"name": "helen",
"city": "London"
})
.useInteraction({
request: {
method: 'GET',
path: 'https://62b32eab4f851f87f4563d9b.mockapi.io/user/32'
},
response: {
status: 200,
body: [
{"name":"Jerald Labadie","country":"Buckinghamshire","city":"Lake Junebury","email":"Alf_Schneider81#gmail.com","id":"32"}
]
}
})
.expectStatus(200)
.wait(3000)
})
I know I can just connect to mockapi for the mock, but is there any way to resolve this and do this locally?

Answer 1

While using mocks, we need to divert the traffic from your service to the local mock server. Can be achieved simply by using environment variables.
const mock_url = process.env.MOCK_URL || 'https://<key>.mockapi.io';
Now, start the sever by initiating the MOCK_URL environment variable to the pactum's mock server url. Assuming pactum mock server is running on localhost 9393.
export MOCK_URL=http://localhost:9393 && node server.js
Now update your interaction to handle the traffic.
it('should update record', async () => {
await spec()
.useInteraction({
request: {
method: 'GET',
path: '/user/32'
},
response: {
status: 200,
body: [ {"name":"Jerald Labadie","country":"Buckinghamshire","city":"Lake Junebury","email":"Alf_Schneider81#gmail.com","id":"32"} ]
}
})
.post('http://localhost:3000/user')
.withJson({
"name": "helen",
"city": "London"
})
.expectStatus(200)
})