I am currently running WSL2. I have installed google-chrome-stable and chromedriver in the system.
google-chrome-stable: Google Chrome 92.0.4515.131
chromedriver: ChromeDriver 92.0.4515.43
# Gemfile
group :test do
gem "capybara", ">= 3.26"
gem "selenium-webdriver"
gem "webdrivers"
end
# test/application_system_test_case.rb
class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
driven_by :selenium, using: :headless_chrome do |option|
option.add_argument "no-sandbox"
end
end
# test/system/users_test.rb
class UsersTest < ApplicationSystemTestCase
def setup
Capybara.app_host = "http://app.example.com/"
end
test "user sign up" do
visit new_user_path
fill_in "user[name]", with: "Jane Hemmingway"
fill_in "user[email]", with: "jane@example.com"
fill_in "user[password]", with: "secret_password"
click_button "get started"
assert_redirected_to accounts_path
end
end
But when I run this test, it throws an error.
Error:
UsersTest#test_user_sign_up:
Selenium::WebDriver::Error::UnknownError: unknown error: net::ERR_NAME_NOT_RESOLVED
(Session info: headless chrome=92.0.4515.131)
test/system/users_test.rb:9:in `block in <class:UsersTest>'
I'm confused about what this error means. Is there a way I can fix it?
Ok, so instead of setting Capybara.app_host as http://app.example.com/, we need to set it to http://app.lvh.me.
We also need to tell capybara to always include the port.
# test/application_system_test_case.rb
Capybara.configure do |config|
config.always_include_port = true
end
Now the tests runs as expected.
The error net::ERR_NAME_NOT_RESOLVED is telling you what the problem is. www.example.com isn't resolving to an ip address on whatever machine the browser is being launched on.