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rspec - 如何配置 Capybara 在 dockerized Selenium Grid 中运行测试?

转载 作者:行者123 更新时间:2023-12-03 20:56:49 25 4
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我有一套要在 dockerized Selenium Grid 中执行的测试。测试是使用 RSpec 和 Capybara 用 Ruby 编写的。另外值得注意的是:我正在使用 dinghy作为 docker-machine 的包装器。
几周前,我建立了一个 proof of concept但使用 Nightwatch 而不是 RSpec+Capybara。这很好用,但让 Capybara 与 dockerized Selenium Grid 一起工作已被证明是困难的。
我已经尝试了许多配置但没有成功。我认为我最接近成功配置的是以下...

# docker-compose.yml

web:
image: web:latest # built on my machine
environment:
VIRTUAL_HOST: app.under.test

rspec:
build: .
dockerfile: Dockerfile
environment:
APP_HOST: app.under.test
volumes:
- .:/usr/src/app
links:
- web
- hub

hub:
image: selenium/hub:latest
environment:
VIRTUAL_HOST: selenium.hub.docker
ports:
- 4444:4444

node-firefox:
image: selenium/node-firefox:latest
environment:
VIRTUAL_HOST: firefox.docker
links:
- hub

node-chrome:
image: selenium/node-chrome:latest
environment:
VIRTUAL_HOST: chrome.docker
links:
- hub
# Dockerfile for the rspec image

FROM instructure/ruby-passenger:2.3

USER root

ENV APP_HOME /usr/src/app
RUN mkdir -p $APP_HOME
WORKDIR $APP_HOME

COPY Gemfile Gemfile.lock $APP_HOME/
RUN chown -R docker:docker $APP_HOME

USER docker
RUN bundle install --quiet --jobs 8
USER root

COPY . $APP_HOME
RUN chown -R docker:docker $APP_HOME

USER docker
# spec/example_test.rb:

require 'rspec'
require 'capybara'
require 'capybara/dsl'
require 'selenium-webdriver'

RSpec.configure do |config|
config.include Capybara::DSL
end

def setup
url = 'http://selenium.hub.docker'
capabilities = Selenium::WebDriver::Remote::Capabilities.firefox
Capybara.app_host = ENV['APP_HOST']

Capybara.register_driver :remote_browser do |app|
Capybara::Selenium::Driver.new(
app,
:browser => :remote,
url: url,
desired_capabilities: capabilities
)
end

Capybara.default_driver = :remote_browser
Capybara.javascript_driver = :remote_browser
end

describe 'This is an example' do
it 'and it works' do
setup
visit '/'
expect(page.title).to eq 'Home'
end
end
但是这个 ^ 配置在开始测试时会产生以下错误:
1) This is an example and it works
Failure/Error: visit '/'

Selenium::WebDriver::Error::WebDriverError:
unexpected response, code=200, content-type="text/html"
<html><head><title>Selenium Grid2.0 help</title></head><body>You are using grid 2.52.0<br>Find help on the official selenium wiki : <a href='https://github.com/SeleniumHQ/selenium/wiki/Grid2' >more help here</a><br>default monitoring page : <a href='/grid/console' >console</a></body></html>
# /home/docker/.gem/ruby/2.3.0/gems/selenium-webdriver-2.52.0/lib/selenium/webdriver/remote/http/common.rb:85:in `create_response'
# /home/docker/.gem/ruby/2.3.0/gems/selenium-webdriver-2.52.0/lib/selenium/webdriver/remote/http/default.rb:90:in `request'
# /home/docker/.gem/ruby/2.3.0/gems/selenium-webdriver-2.52.0/lib/selenium/webdriver/remote/http/common.rb:59:in `call'
# /home/docker/.gem/ruby/2.3.0/gems/selenium-webdriver-2.52.0/lib/selenium/webdriver/remote/bridge.rb:645:in `raw_execute'
# /home/docker/.gem/ruby/2.3.0/gems/selenium-webdriver-2.52.0/lib/selenium/webdriver/remote/bridge.rb:123:in `create_session'
# /home/docker/.gem/ruby/2.3.0/gems/selenium-webdriver-2.52.0/lib/selenium/webdriver/remote/bridge.rb:87:in `initialize'
# /home/docker/.gem/ruby/2.3.0/gems/selenium-webdriver-2.52.0/lib/selenium/webdriver/common/driver.rb:59:in `new'
# /home/docker/.gem/ruby/2.3.0/gems/selenium-webdriver-2.52.0/lib/selenium/webdriver/common/driver.rb:59:in `for'
# /home/docker/.gem/ruby/2.3.0/gems/selenium-webdriver-2.52.0/lib/selenium/webdriver.rb:86:in `for'
# /home/docker/.gem/ruby/2.3.0/gems/capybara-2.6.2/lib/capybara/selenium/driver.rb:13:in `browser'
# /home/docker/.gem/ruby/2.3.0/gems/capybara-2.6.2/lib/capybara/selenium/driver.rb:45:in `visit'
# /home/docker/.gem/ruby/2.3.0/gems/capybara-2.6.2/lib/capybara/session.rb:232:in `visit'
# /home/docker/.gem/ruby/2.3.0/gems/capybara-2.6.2/lib/capybara/dsl.rb:51:in `block (2 levels) in <module:DSL>'
# ./spec/example_test.rb:31:in `block (2 levels) in <top (required)>'
有任何想法吗?我错过了什么?
更新
知道了!
def setup
url = 'http://selenium.hub.docker/wd/hub'
capabilities = Selenium::WebDriver::Remote::Capabilities.firefox
Capybara.app_host = "http://#{ENV['APP_HOST']}"
Capybara.run_server = false

Capybara.register_driver :remote_browser do |app|
Capybara::Selenium::Driver.new(
app,
:browser => :remote,
url: url,
desired_capabilities: capabilities
)
end

Capybara.default_driver = :remote_browser
Capybara.javascript_driver = :remote_browser
end
关键---除了 Capybara.run_server = false并添加 http://到 app_host---指定 /wd/hub在网址上。
工作解决方案here .

最佳答案

对于 capybara 设置,您需要担心一些事情 -

1 - capybara 连接到浏览器的地方 - 在大多数人的情况下,这是本地的,但您使用的是远程,并且您似乎已正确配置

2 - 浏览器尝试连接的地方 - 由 Capybara.app_host 设置的基本 url - 所以 Capybara.app_host = "http://<ip/domain 应用程序将在其上运行的名称> - 你已将其设置为 ENV['APP_HOST' ] 设置为 app.under.test - 我假设那是解析为机器 capybara 正在运行的可访问接口(interface)的 ip/域名?

3 - Capybara 绑定(bind)正在测试的应用程序 - 这是通过 Capybara.server_host 和 Capybara.server_port 设置的 - server_host 默认为 127.0.0.1 并且端口是随机选择的。这很可能是您的问题所在,因为运行 Capybara 的机器上的 127.0.0.1 通常无法从其他机器访问您需要将其更改为与 #2 中的 app.under.test 匹配的外部可用 ip。如果您的防火墙配置需要,您可能还需要设置端口。

关于rspec - 如何配置 Capybara 在 dockerized Selenium Grid 中运行测试?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35821718/

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