Set up Selenium with a docker rails app on wsl2

Question

After following a couple of tutorials I can't figure out how to configure Selenium with:

a rails app on debian wsl2
the gem "Webdrivers"
docker With my local application, Selenium worked properly with

require "webdrivers"

Since I have dockerized the app, everything works properly except Selenium.

When I run a js test I get

Webdrivers::NetworkError:
Net::HTTPServerException: 404 "Not Found" with https://github.com/mozilla/geckodriver/releases/download/v0/geckodriver-v0-linux64.tar.gz

It seems that the request url is not build correctly "v0"

When I hard code a version number in my config file like so

Webdrivers::Geckodriver.required_version = "0.32.0"

geckodriver is downloaded properly.

1- How can I configure webdriver to handle verssion automatically ?

Then I get this error message

 Selenium::WebDriver::Error::SessionNotCreatedError:
Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line

What I understand is that it tries to reach for the firefox application. I have firefox installed on windows side and firefox-esr on wsl2/debian side.

2- How can I configure webdrivers and/or docker to run my tests with selenium ?

I have tried to hard code the firefox path.

Here is my webdrivers config, with many settings attempts.

Capybara.register_driver :remote_firefox do |app|
  firefox_capabilities = ::Selenium::WebDriver::Remote::Capabilities.firefox
  #   (
  #     "moz:firefoxOptions": {
  #         "args": %w[headless window-size=1400,1400]
  #         },
  #         "binary": "/mnt/c/Users/Fz/AppData/Local/Microsoft/WindowsApps/firefox.exe"
  #   )

  firefox_options = Selenium::WebDriver::Firefox::Options.new
  firefox_options.binary = "/mnt/c/Users/Fz/AppData/Local/Microsoft/WindowsApps/firefox.exe"

  Capybara::Selenium::Driver.new(
      app,
      browser: :remote,
      url: "http://172.28.0.7:5555",
      #   desired_capabilities: firefox_capabilities,
      options: firefox_options
    ) 
end

RSpec.configure do |config|
  config.before(:each) do
    Capybara.current_driver = :remote_firefox
    Capybara.javascript_driver = :remote_firefox
    Capybara.app_host = "http://#{IPSocket.getaddress(Socket.gethostname)}:3000"
    Capybara.server_host = IPSocket.getaddress(Socket.gethostname)
    Capybara.server_port = 5555
  end
end

###############################################
# Selenium::WebDriver::Firefox.path = "/mnt/c/Users/Fz/AppData/Local/Microsoft/WindowsApps/firefox.exe"
# Selenium::WebDriver::Firefox.path = "/usr/bin/firefox"

# Selenium::WebDriver::Firefox.path = "//wsl.localhost/Debian/usr/bin/firefox"

# options = Selenium::WebDriver::Firefox::Options.new
# options.binary = "/usr/bin/firefox"
#
# driver = Selenium::WebDriver.for :remote,
#   url: "http://localhost:4444",
#   desired_capabilities: :firefox,
#   options: ""
#########################################

with 'desired_capabilities' I get

ArgumentError:
unknown keyword: :desired_capabilities

without I get

Selenium::WebDriver::Error::WebDriverError
  unexpected response, code=404, content-type=""
  {
   "value": {
   "error": "unknown command",
   "message": "Unable to find handler for (POST) \u002fsession",
   "stacktrace": ""
   }
  }

here is my docker-compose file

version: '3'
networks:
  development:
  test:
volumes:
  db_data:
  es_data:
  gem_cache:
  shared_data:
  selenium_data:
services:
(...)
capoeiragem_dev:
    build:
      context: .
      dockerfile: ./config/containers/Dockerfile.dev
    container_name: capoeiragem_dev
    volumes:
      - .:/var/app
      - shared_data:/usr/share
      - gem_cache:/usr/local/bundle/gems
    networks:
      - development
    ports:
      - 3000:3000
    stdin_open: true
    tty: true
    env_file: .env.development
    entrypoint: entrypoint-dev.sh
    command: [ 'bundle', 'exec', 'rails', 'server', '-p', '3000', '-b', '0.0.0.0' ]
    environment:
      RAILS_ENV: development
    depends_on:
      - capoeiragem_db
      - capoeiragem_es
(...)
guard:
    tty: true
    stdin_open: true
    build:
      context: .
      dockerfile: ./config/containers/Dockerfile.dev
    volumes:
      - .:/var/app
      - gem_cache:/usr/local/bundle/gems
    networks:
      - development
    environment:
      RAILS_ENV: development
    command: [ 'bundle', 'exec', 'guard', '--no-bundler-warning' ]
    ports:
      - 35729:35729
    depends_on:
      - capoeiragem_dev
      - capoeiragem_selenium
(...)
capoeiragem_firefox:
    image: selenium/node-firefox:dev
    networks:
      - development
    shm_size: 2gb
    depends_on:
      - capoeiragem_selenium
    environment:
      - SE_EVENT_BUS_HOST=capoeiragem_selenium
      - SE_EVENT_BUS_PUBLISH_PORT=4442
      - SE_EVENT_BUS_SUBSCRIBE_PORT=4443
  capoeiragem_chrome:
    image: selenium/node-chrome:dev
    networks:
      - development
    shm_size: 2gb
    depends_on:
      - capoeiragem_selenium
    environment:
      - SE_EVENT_BUS_HOST=capoeiragem_selenium
      - SE_EVENT_BUS_PUBLISH_PORT=4442
      - SE_EVENT_BUS_SUBSCRIBE_PORT=4443
  capoeiragem_selenium:
    image: selenium/hub:latest
    volumes:
      - selenium_data:/usr/share/selenium/data
    networks:
      - development
    container_name: capoeiragem_selenium
    ports:
      - "4442:4442"
      - "4443:4443"
      - "4444:4444"

I can see the firefox node at http://localhost:4444/ui

Set up Selenium with a docker rails app on wsl2

0 Answers0