cannot use http://app as a baseurl

[Hulkmaster]

So i'm using cypress/included image, and recently i tried to upgrade and started to have an issue

ERR_CONNECTION_CLOSED (-100) loading 'https://app/__/#/tests/integration/all-page-visit.spec.js'
Error: ERR_CONNECTION_CLOSED (-100) loading 'https://app/__/#/tests/integration/all-page-visit.spec.js'
    at rejectAndCleanup (electron/js2c/browser_init.js:5881:21)
    at WebContents.failListener (electron/js2c/browser_init.js:5891:11)
    at WebContents.emit (events.js:203:13)

that issue started to happen after upgrading
from cypress/included:3.8.1
to cypress/included:3.8.2

also might be related cypress-io/cypress#5482 (there you can also find repro)

thats my config

  cypress:
    image: "cypress/included:3.8.2"
    depends_on:
      - app
    environment:
      - CYPRESS_BASE_URL=http://app
    working_dir: /e2e
    volumes:
      - ./e2e:/e2e

so on cypress/included:3.8.1 works fine
starting cypress/included:3.8.2 have an error (also on 4.0.2)

UPD:
new test repo https://github.com/Hulkmaster/cypress-app-test

works on 3.8.1
works on 3.8.2
doesn't work on 4.5.0

[bahmutov]

Not sure why it would be the case, can you try renaming the container from app to something else?

[Hulkmaster]

nope

project is pretty old and big, and there is a lot of hardcoded hostnames, and right now we are trying to implement e2e testing

should it not be easy to just provide in cypress option like CYPRESS_ENGINE_URL or something?

also its clear that problem happened from 3.8.1 to 3.8.2, should it be easy to track it?

[Alaatohamy]

Did you try to add the port of your app like this

app:
    // your config
    ports:
      - 3000:3000
cypress:
    environment:
      - CYPRESS_BASE_URL=http://app:3000

[Hulkmaster]

my app must work on 80 port, because its the entrypoint of the whole app

[Hulkmaster]

As I stated in description it started to happen in 3.8.2
According to screenshot you have 3.8.0 version

[jennifer-shehane]

That's the version included in https://github.com/textbook/cypress-test-tiny/tree/recreate-base-url-issue

[Hulkmaster]

give me a hour - i'll create another repro repo

[Hulkmaster]

https://github.com/Hulkmaster/cypress-app-test

the strange part is
works on 3.8.1
works on 3.8.2

doesn't work on 4.5.0
(had not tested other versions)

[jennifer-shehane]

Yeah, I can recreate the issue as provided from this repo running docker-compose up. Changing the value of the baseUrl to another value makes it run.

// fails with connection error (abnormal behavior)
CYPRESS_baseUrl=http://app  

// fails because it can't connect to server (normal behavior)
CYPRESS_baseUrl=http://foo

// passes, visits the site
CYPRESS_baseUrl=https://example.cypress.io

Full docker-app.log

[mjhenkes]

I updated the reproduction to 12.3.0. Works fine now.