我正在尝试配置系统测试,以便在selenium中使用无头铬。我有以下的水豚配置:
# spec/support/capybara.rb
Capybara.server = :puma, { Silent: true }
RSpec.configure do |config|
config.before(:each, type: :system) do
driven_by :rack_test
end
config.before(:each, type: :system, js: true) do
driven_by :selenium_chrome_headless, screen_size: [1400, 1400]
end
end
和下面的Dockerfile (没有数据库,因为我使用的是主机):
FROM ruby:2.5.1
RUN apt-get update
RUN apt-get install -y wget git
# Node
RUN curl -sL https://deb.nodesource.com/setup_9.x | bash -
RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
RUN apt-get update
# Essentials
RUN apt-get install -y git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev software-properties-common libffi-dev nodejs yarn unzip
# Chrome
RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
&& echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list
RUN apt-get update && apt-get -y install google-chrome-stable
# Chromedriver
RUN wget -q https://chromedriver.storage.googleapis.com/2.39/chromedriver_linux64.zip
RUN unzip chromedriver_linux64.zip -d /usr/local/bin
RUN rm -f chromedriver_linux64.zip
RUN apt-get clean
我在网上关注了几个关于如何设置headless_chrome测试的来源,但它们都恢复到了上面的配置。尝试运行水豚,它显示以下错误,我似乎不能成功地调试它。
Selenium::WebDriver::Error::UnknownError:
unknown error: DevToolsActivePort file doesn't exist
(Driver info: chromedriver=2.39.562737 (dba483cee6a5f15e2e2d73df16968ab10b38a2bf),platform=Linux 4.16.11-1-ARCH x86_64)
上述docker文件包含最新的chrome和chromedriver版本,分别为67和2.39。我也尝试过老版本,上面也有同样的错误,例如66和2.38,符合http://chromedriver.chromium.org/downloads上的版本支持。
以前有没有人见过这个错误?
发布于 2018-05-31 03:22:33
似乎水豚的默认selenium_chrome_headless设置不足以在docker容器中运行。我已经通过将spec/support/capybara.rb设置更改为以下内容来解决此问题:
# spec/support/capybara.rb
# Setup chrome headless driver
Capybara.server = :puma, { Silent: true }
Capybara.register_driver :chrome_headless do |app|
options = ::Selenium::WebDriver::Chrome::Options.new
options.add_argument('--headless')
options.add_argument('--no-sandbox')
options.add_argument('--disable-dev-shm-usage')
options.add_argument('--window-size=1400,1400')
Capybara::Selenium::Driver.new(app, browser: :chrome, options: options)
end
Capybara.javascript_driver = :chrome_headless
# Setup rspec
RSpec.configure do |config|
config.before(:each, type: :system) do
driven_by :rack_test
end
config.before(:each, type: :system, js: true) do
driven_by :chrome_headless
end
end
尤其不要忘记"--disable-dev-shm-usage“,因为它解决了docker中有限的资源问题,如:https://github.com/GoogleChrome/puppeteer/issues/1834中所述
编辑:我没有对上面的Dockerfile文件做任何更改
https://stackoverflow.com/questions/50610316
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