热衷于将 Capybara 烘焙到新版 Rails (5.1) cfhttp://weblog.rubyonrails.org/2017/2/23/Rails-5-1-beta1/ http://weblog.rubyonrails.org/2017/2/23/Rails-5-1-beta1/
不过我遇到了问题。这是我的步骤。欢迎任何线索。
全新安装:
- Linux Ubuntu Desktop 16.10(Hyper-V 上的虚拟机),安装了 Chrome 并运行良好;
- 红宝石 2.4;
- Rails 5.1.beta。
1.- 创建一个简单的应用程序:
~$ ruby -v
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]
~$ rails -v
Rails 5.1.0.beta1
~$ mkdir railsapps
~$ cd railsapps
~/railsapps$ rails new smoketestapp
~/railsapps$ cd smoketestapp
~/railsapps/smoketestapp$ rails generate scaffold post title:string body:text
~/railsapps/smoketestapp$ rails db:migrate
2.- 运行测试
~/railsapps/smoketestapp$ cat test/system/posts_test.rb
require "application_system_test_case"
class PostsTest < ApplicationSystemTestCase
test "visiting the index" do
visit posts_url
assert_selector "h1", text: "Post"
end
end
~/railsapps/smoketestapp$ rake test TEST=test/system/posts_test.rb
Run options: --seed 55778
# Running:
...
Error:
PostsTest#test_visiting_the_index:
Selenium::WebDriver::Error::WebDriverError: Unable to find chromedriver. Please download the server from http://chromedriver.storage.googleapis.com/index.html and place it somewhere on your PATH. More info at https://github.com/SeleniumHQ/selenium/wiki/ChromeDriver.
...
1 runs, 0 assertions, 0 failures, 1 errors, 0 skips
~/railsapps/smoketestapp$
3.- 好的,让我们按照错误消息中的建议进行操作(安装chromedriver
) :
~/railsapps/smoketestapp$ ls /usr/bin/google-chrome
lrwxrwxrwx 1 root root 31 Mar 18 15:31 /usr/bin/google-chrome -> /etc/alternatives/google-chrome*
~/railsapps/smoketestapp$ echo $PATH
...:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:...
~/railsapps/smoketestapp$ wget https://chromedriver.storage.googleapis.com/2.28/chromedriver_linux64.zip
~/railsapps/smoketestapp$ unzip chromedriver_linux64.zip
~/railsapps/smoketestapp$ sudo cp chromedriver /usr/local/bin
~/railsapps/smoketestapp$ ls /usr/local/bin
total 7504
drwxr-xr-x 2 root root 4096 Mar 19 19:05 ./
drwxr-xr-x 10 root root 4096 Okt 12 22:42 ../
-rwxr-xr-x 1 root root 7673176 Mar 19 19:05 chromedriver*
~/railsapps/smoketestapp$
4.- 好的。重试测试...
~/railsapps/smoketestapp$ rake test TEST=test/system/posts_test.rb
Run options: --seed 51574
# Running:
...
Error:
PostsTest#test_visiting_the_index:
Net::ReadTimeout: Net::ReadTimeout test/system/posts _test.rb:5:in `block in '
...
bin/rails test test/system/posts_test.rb:4
...
1 runs, 0 assertions, 0 failures, 1 errors, 0 skips
~/railsapps/smoketestapp$
Not OK!
关于根本原因的线索'Net::ReadTimeout: Net::ReadTimeout'运行时给出错误信息rails -v
在应用程序目录中,给出Selenium::WebDriver::Error::UnknownError: 未知错误:Chrome 无法启动:
~/railsapps/smoketestapp$ rails -v
Run options: --seed 39896
# Running:
.......E
Error:
PostsTest#test_visiting_the_index:
Selenium::WebDriver::Error::UnknownError: unknown error: Chrome failed to start: exited abnormally
(Driver info: chromedriver=2.28.455506 (18f6627e265f442aeec9b6661a49fe819aeeea1f),platform=Linux 4.8.0-41-generic x86_64)
test/system/posts_test.rb:5:in `block in <class:PostsTest>'
Error:
PostsTest#test_visiting_the_index:
Net::ReadTimeout: Net::ReadTimeout
bin/rails test test/system/posts_test.rb:4
...
~/railsapps/smoketestapp$
这是我直接从 Ruby 调用 Selenium WebDriver 时得到的结果:
~/railsapps/smoketestapp$ irb
2.4.0 :001 > require "selenium-webdriver"
=> true
2.4.0 :002 > driver = Selenium::WebDriver.for(:chrome)
Net::ReadTimeout: Net::ReadTimeout
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/protocol.rb:176:in `rbuf_fill'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/protocol.rb:154:in `readuntil'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/protocol.rb:164:in `readline'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/http/response.rb:40:in `read_status_line'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/http/response.rb:29:in `read_new'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/http.rb:1446:in `block in transport_request'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/http.rb:1443:in `catch'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/http.rb:1443:in `transport_request'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/http.rb:1416:in `request'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/http.rb:1409:in `block in request'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/http.rb:877:in `start'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/net/http.rb:1407:in `request'
from ~/.rvm/gems/ruby-2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/http/default.rb:124:in `response_for'
from ~/.rvm/gems/ruby-2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/http/default.rb:78:in `request'
from ~/.rvm/gems/ruby-2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/http/common.rb:61:in `call'
from ~/.rvm/gems/ruby-2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/bridge.rb:669:in `raw_execute'
from ~/.rvm/gems/ruby-2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/bridge.rb:108:in `create_session'
from ~/.rvm/gems/ruby-2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/bridge.rb:71:in `initialize'
from ~/.rvm/gems/ruby-2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/chrome/bridge.rb:52:in `initialize'
from ~/.rvm/gems/ruby-2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/common/driver.rb:61:in `new'
from ~/.rvm/gems/ruby-2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/common/driver.rb:61:in `for'
from ~/.rvm/gems/ruby-2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver.rb:87:in `for'
from (irb):2
from ~/.rvm/rubies/ruby-2.4.0/bin/irb:11:in `<main>'
2.4.0 :003 > exit
~/railsapps/smoketestapp$
任何帮助表示赞赏,谢谢
Varus
Update:
发现问题,查看 Selenium 驱动程序的日志文件。为此,我在 IRB 中输入以下内容:
require "selenium-webdriver"
Selenium::WebDriver::Chrome.driver_path="/usr/local/bin/chromedriver"
Selenium::WebDriver.for :chrome, :service_log_path => "/tmp/cd.log"
driver = Selenium::WebDriver.for(:chrome)
跟踪日志文件确定了这一点:chrome 无法启动:
~/railsapps/smoketestapp$ tail /tmp/cd.log
...
[0.247][INFO]: Launching chrome: /opt/google/chrome/google-chrome --disable-background-networking --disable-client-side-phishing-detection --disable-component-update --disable-default-apps --disable-hang-monitor --disable-prompt-on-repost --disable-web-resources --enable-logging --full-memory-crash-report --ignore-certificate-errors --load-extension=/tmp/.org.chromium.Chromium.Pdre6o/internal --logging-level=1 --metrics-recording-only --no-first-run --password-store=basic --remote-debugging-port=12264 --safebrowsing-disable-auto-update --safebrowsing-disable-download-protection --use-mock-keychain --user-data-dir=/tmp/.org.chromium.Chromium.mHJaEd data:,
[0.250][WARNING]: PAC support disabled because there is no system implementation
[20.281][INFO]: RESPONSE InitSession unknown error: Chrome failed to start: exited abnormally
~/railsapps/smoketestapp$
最后我发现通过 PuTTY 远程调用 chrome 不起作用(这就是我一直在做的事情),尽管直接在虚拟机(在终端服务器中)上执行相同的操作是有效的.
在腻子上:
~$ google-chrome
[3938:3938:0320/213941.129923:ERROR:browser_main_loop.cc(279)] Gtk: cannot open display:
然而,它直接在虚拟机上运行。
不幸的是,我的快乐是短暂的,因为我遇到了另一个错误,但那是另一个故事了:
irb(main):001:0> require "selenium-webdriver"
=> true
irb(main):002:0> Selenium::WebDriver::Chrome.driver_path="/usr/local/bin/chromedriver"
=> "/usr/local/bin/chromedriver"
irb(main):003:0> driver = Selenium::WebDriver.for(:chrome)
=> #<Selenium::WebDriver::Driver:0x59d7c889a916c6b8 browser=:chrome>
irb(main):004:0> driver.navigate.to("http://www.google.com")
Selenium::WebDriver::Error::UnknownError: unknown error: Runtime.executionContextCreated has invalid 'context': {"auxData":{"frameId":"10797.1","isDefault":true},"id":1,"name":"","origin":"://"}
(Session info: chrome=57.0.2987.110)
(Driver info: chromedriver=2.4.226074,platform=Linux 4.8.0-41-generic x86_64)
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/response.rb:69:in `assert_ok'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/response.rb:32:in `initialize'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/http/common.rb:83:in `new'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/http/common.rb:83:in `create_response'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/http/default.rb:107:in `request'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/http/common.rb:61:in `call'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/bridge.rb:669:in `raw_execute'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/bridge.rb:647:in `execute'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/bridge.rb:120:in `get'
from ~/.rvm/rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/common/navigation.rb:32:in `to'
from (irb):4
from ~/.rvm/rubies/ruby-2.4.0/bin/irb:11:in `<main>'
irb(main):005:0> exit