Error running Selenium automatically from Nightwatch.js with Firefox

问题

I want to start Selenium Server automatically when I run a nightwatch.js test case. I changed the selenium settings on nightwatch.json to:

  "selenium" : {
    "start_process" : true,
    "server_path" : "./selenium/selenium391.jar",
    "log_path" : "C:/Projects/reports",
    "host" : "127.0.0.1",
    "port" : 4444,
    "cli_args" : {
      "webdriver.chrome.driver" : "./selenium/chromedriver.exe",
      "webdriver.ie.driver" : "./selenium/IEDriverServer.exe",
      "webdriver.firefox.profile" : "./selenium/geckodriver.exe"
    }
  },

This configuration works when I use Chrome as browser. However I got an error when I run it using Firefox:

ERROR Response 500 POST /wd/hub/session (312ms) { value:
   { message: 'Unable to create new service: GeckoDriverService\nBuild info: ver
sion: \'3.9.1\', revision: \'63f7b50\', time: \'2018-02-07T22:42:28.403Z\'\nSyst
em info: host: \'IBS-PC192\', ip: \'192.168.1.115\', os.name: \'Windows 7\', os.
arch: \'x86\', os.version: \'6.1\', java.version: \'1.8.0_112\'\nDriver info: dr
iver.version: unknown',
     error: 'session not created' },
  status: 33 }

If I run the Selenium Server manually, the nightwatch test works on Firefox. How do I resolve this?

nightwatch.json file: for Firefox

{
  "src_folders" : ["tests"],
  "output_folder" : "reports",
  "custom_commands_path" : "",
  "page_objects_path" : "",
  "custom_assertions_path" : "",
  "globals_path" : "C:/Projects/global/globals.js",
  "live_output" : false,
  "parallel_process_delay" : 10,
  "disable_colors": false,
  "test_workers" : false,

  "selenium" : {
    "start_process" : true,
    "server_path" : "./selenium/selenium391.jar",
    "log_path" : "C:/Projects/reports",
    "host" : "127.0.0.1",
    "port" : 4444,
    "cli_args" : {
      "webdriver.chrome.driver" : "./selenium/chromedriver.exe",
      "webdriver.ie.driver" : "./selenium/IEDriverServer.exe",
      "webdriver.firefox.profile" : "./selenium/geckodriver.exe"
    }
  },

  "test_settings" : {
    "default" : {
      "launch_url" : "http://localhost",
      "selenium_host" : "127.0.0.1",
      "selenium_port" : 4444,
      "silent" : true,
      "disable_colors": false,
      "screenshots" : {
        "enabled" : false,
        "path" : ""
      },
      "desiredCapabilities" : {
        "browserName" : "firefox",
        "javascriptEnabled" : true,
        "acceptSslCerts" : true
      }
    },

The content of selenium-debug.log

14:24:00.791 INFO - Selenium build info: version: '3.9.1', revision: '63f7b50'
14:24:00.791 INFO - Launching a standalone Selenium Server on port 4444
2018-02-16 14:24:00.853:INFO::main: Logging initialized @280ms to org.seleniumhq.jetty9.util.log.StdErrLog
2018-02-16 14:24:00.962:INFO:osjs.Server:main: jetty-9.4.7.v20170914, build timestamp: 2017-11-21T22:27:37+01:00, git hash: 82b8fb23f757335bb3329d540ce37a2a2615f0a8
2018-02-16 14:24:00.978:WARN:osjs.SecurityHandler:main: ServletContext@o.s.j.s.ServletContextHandler@5ed7a6{/,null,STARTING} has uncovered http methods for path: /
2018-02-16 14:24:00.978:INFO:osjsh.ContextHandler:main: Started o.s.j.s.ServletContextHandler@5ed7a6{/,null,AVAILABLE}
2018-02-16 14:24:01.352:INFO:osjs.AbstractConnector:main: Started ServerConnector@18f65a4{HTTP/1.1,[http/1.1]}{0.0.0.0:4444}
2018-02-16 14:24:01.352:INFO:osjs.Server:main: Started @782ms
14:24:01.352 INFO - Selenium Server is up and running on port 4444
2018-02-16 14:24:01.540:INFO:osjshC.ROOT:qtp17048053-10: org.openqa.selenium.remote.server.WebDriverServlet-132ec19: Initialising WebDriverServlet
14:24:01.618 INFO - Found handler: org.openqa.selenium.remote.server.commandhandler.BeginSession@1e1a802
14:24:01.618 INFO - /session: Executing POST on /session (handler: BeginSession)
14:24:01.680 INFO - Capabilities are: Capabilities {acceptSslCerts: true, browserName: firefox, javascriptEnabled: true, name: Google Wiki}
14:24:01.680 INFO - Capabilities {acceptSslCerts: true, browserName: firefox, javascriptEnabled: true, name: Google Wiki} matched class org.openqa.selenium.remote.server.ServicedSession$Factory (provider: org.openqa.selenium.firefox.GeckoDriverService)

回答1:

The error you are seeing does gives us some hint about whats going wrong as follows :

ERROR Response 500 POST /wd/hub/session (312ms) { value: { message: 'Unable to create new service: GeckoDriverService\nBuild info: version: \'3.9.1\', revision: \'63f7b50\', time: \'2018-02-07T22:42:28.403Z\'\nSystem info: host: \'IBS-PC192\', ip: \'192.168.1.115\', os.name: \'Windows 7\', os.arch: \'x86\', os.version: \'6.1\', java.version: \'1.8.0_112\'\nDriver info: driver.version: unknown', error: 'session not created' }, status: 33 }

The HyperText Transfer Protocol (HTTP) Response 500 server error response code indicates that the server encountered an unexpected condition that prevented it from fulfilling the request.

The main reason is the binaries you are using are incompatible as :

Selenium Client version is as selenium391.jar released '2018-02-07T22:42:28.403Z'
But the JDK version is as java.version: '1.8.0_112 which is pretty ancient.

Solution

A quick solution would be to :

Update the JDK version to recent levels i.e. Java SE Development Kit 8u161
Run CCleaner tool to wipe off the OS chores before and after executing your Test Suite

Update

As you mentioned in your comment that you still got the same error you need to change the following line :

"webdriver.firefox.profile" : "./selenium/geckodriver.exe"

To :

"webdriver.gecko.driver" : "./selenium/geckodriver.exe"

来源：https://stackoverflow.com/questions/48827865/error-running-selenium-automatically-from-nightwatch-js-with-firefox

标签

node.js

windows

selenium

nightwatch.js

geckodriver