Installing/using C9.io 中 Nightwatch.js 的硒

Question

我正在尝试使用 Nightwatch.js 进行自动化单元和端到端测试。 Nightwatch.js 取决于硒。

我已经确定了如何安装它（参见下面的 "Steps to install Selenium"），并且可以启动 Selenium 服务器（通过 bin/ java -jar selenium-server-standalone-2.48.2.jar）。
然而，当我尝试运行一个基本的守夜人测试时，由于浏览器、url 和端口配置问题（下面的错误），我遇到了错误。
有没有人可以提供一些提示，说明我应该如何 configure the nightwatch.json 文件来使用安装到 C9 中的 Selenium？

安装 Selenium 的步骤

mkdir bin
cd bin
wget "http://selenium-release.storage.googleapis.com/2.48/selenium-server-standalone-2.48.2.jar"
unzip selenium-server-standalone-2.48.2.jar
cd ..

日志

03:26:27.875 INFO - Executing: [new session: Capabilities [{platform=ANY, acceptSslCerts=true, javascriptEnabled=true, browserName=firefox, name=Basic}]])
03:26:27.893 INFO - Creating a new session for Capabilities [{platform=ANY, acceptSslCerts=true, javascriptEnabled=true, browserName=firefox, name=Basic}]
org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:

(process:3585): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
Error: no display specified

        at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:122)
        at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:271)
        at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:117)
        at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:218)
        at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:211)
        at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:129)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at org.openqa.selenium.remote.server.FirefoxDriverProvider.callConstructor(FirefoxDriverProvider.java:91)
        at org.openqa.selenium.remote.server.FirefoxDriverProvider.newInstance(FirefoxDriverProvider.java:68)
        at org.openqa.selenium.remote.server.DefaultDriverFactory.newInstance(DefaultDriverFactory.java:60)
        at org.openqa.selenium.remote.server.DefaultSession$BrowserCreator.call(DefaultSession.java:222)
        at org.openqa.selenium.remote.server.DefaultSession$BrowserCreator.call(DefaultSession.java:1)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at org.openqa.selenium.remote.server.DefaultSession.run(DefaultSession.java:176)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
03:27:13.875 WARN - Exception thrown
java.util.concurrent.ExecutionException: org.openqa.selenium.WebDriverException: java.lang.reflect.InvocationTargetException
Build info: version: '2.48.2', revision: '41bccdd', time: '2015-10-09 19:59:12'
System info: host: 'metasean-learnin-nightwatch-2330511', ip: '172.17.33.167', os.name: 'Linux', os.arch: 'amd64', os.version: '4.2.0-c9', java.version: '1.7.0_85'
Driver info: driver.version: unknown
        at java.util.concurrent.FutureTask.report(FutureTask.java:122)
        at java.util.concurrent.FutureTask.get(FutureTask.java:188)
        at org.openqa.selenium.remote.server.DefaultSession.execute(DefaultSession.java:183)
        at org.openqa.selenium.remote.server.DefaultSession.<init>(DefaultSession.java:119)
        at org.openqa.selenium.remote.server.DefaultSession.createSession(DefaultSession.java:95)
        at org.openqa.selenium.remote.server.DefaultDriverSessions.newSession(DefaultDriverSessions.java:124)
        at org.openqa.selenium.remote.server.handler.NewSession.handle(NewSession.java:58)
        at org.openqa.selenium.remote.server.handler.NewSession.handle(NewSession.java:1)
        at org.openqa.selenium.remote.server.rest.ResultConfig.handle(ResultConfig.java:111)
        at org.openqa.selenium.remote.server.JsonHttpCommandHandler.handleRequest(JsonHttpCommandHandler.java:175)
        at org.openqa.selenium.remote.server.DriverServlet.handleRequest(DriverServlet.java:202)
        at org.openqa.selenium.remote.server.DriverServlet.doPost(DriverServlet.java:164)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
        at org.openqa.selenium.remote.server.DriverServlet.service(DriverServlet.java:130)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
        at org.openqa.jetty.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
        at org.openqa.jetty.jetty.servlet.ServletHandler.dispatch(ServletHandler.java:680)
        at org.openqa.jetty.jetty.servlet.ServletHandler.handle(ServletHandler.java:571)
        at org.openqa.jetty.http.HttpContext.handle(HttpContext.java:1526)
        at org.openqa.jetty.http.HttpContext.handle(HttpContext.java:1479)
        at org.openqa.jetty.http.HttpServer.service(HttpServer.java:920)
        at org.openqa.jetty.http.HttpConnection.service(HttpConnection.java:820)
        at org.openqa.jetty.http.HttpConnection.handleNext(HttpConnection.java:986)
        at org.openqa.jetty.http.HttpConnection.handle(HttpConnection.java:837)
        at org.openqa.jetty.http.SocketListener.handleConnection(SocketListener.java:243)
        at org.openqa.jetty.util.ThreadedServer.handle(ThreadedServer.java:358)
        at org.openqa.jetty.util.ThreadPool$PoolThread.run(ThreadPool.java:537)
Caused by: org.openqa.selenium.WebDriverException: java.lang.reflect.InvocationTargetException
Build info: version: '2.48.2', revision: '41bccdd', time: '2015-10-09 19:59:12'
System info: host: 'metasean-learnin-nightwatch-2330511', ip: '172.17.33.167', os.name: 'Linux', os.arch: 'amd64', os.version: '4.2.0-c9', java.version: '1.7.0_85'
Driver info: driver.version: unknown
        at org.openqa.selenium.remote.server.FirefoxDriverProvider.callConstructor(FirefoxDriverProvider.java:101)
        at org.openqa.selenium.remote.server.FirefoxDriverProvider.newInstance(FirefoxDriverProvider.java:68)
        at org.openqa.selenium.remote.server.DefaultDriverFactory.newInstance(DefaultDriverFactory.java:60)
        at org.openqa.selenium.remote.server.DefaultSession$BrowserCreator.call(DefaultSession.java:222)
        at org.openqa.selenium.remote.server.DefaultSession$BrowserCreator.call(DefaultSession.java:1)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at org.openqa.selenium.remote.server.DefaultSession.run(DefaultSession.java:176)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at org.openqa.selenium.remote.server.FirefoxDriverProvider.callConstructor(FirefoxDriverProvider.java:91)
        ... 9 more
Caused by: org.openqa.selenium.WebDriverException: Failed to connect to binary FirefoxBinary(/usr/bin/firefox) on port 7055; process output follows: 

(process:3585): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
Error: no display specified

Build info: version: '2.48.2', revision: '41bccdd', time: '2015-10-09 19:59:12'
System info: host: 'metasean-learnin-nightwatch-2330511', ip: '172.17.33.167', os.name: 'Linux', os.arch: 'amd64', os.version: '4.2.0-c9', java.version: '1.7.0_85'
Driver info: driver.version: FirefoxDriver
        at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:134)
        at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:271)
        at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:117)
        at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:218)
        at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:211)
        at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:129)
        ... 14 more
Caused by: org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:

(process:3585): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
Error: no display specified

        at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:122)
        ... 19 more
03:27:13.884 WARN - Exception: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:

(process:3585): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
Error: no display specified

Answer 1

对于处于这种情况的其他人，有好消息也有坏消息。

好消息...

在 C9 工作区的顶部，单击 "Preview"，然后单击 "Preview Running Application"。这将打开一个新的 C9 选项卡。
复制新 C9 选项卡地址栏的部分 AFTER "https://"（例如 <project-name>-<username>.c9users.io）。
在 C9 终端中，运行 ping <project-name>-<username>.c9users.io（用您的信息替换 <project-name>-<username>.c9users.io）。这 returns 一个实际的 IP 地址。
在nightwatch.json文件中，将"launch_url"的值设为返回的ip地址
您现在可以运行 nightwatch。 :-)

坏消息... - 我们尝试运行的前两个测试涉及针对 browser.url 和 browser.end 的测试，在这两种情况下，nightwatch 的 browser 对象似乎已在某处被修改。我们不确定在哪里、为什么或如何修复它，但如果没有它，能够运行 nightwatch 对我们没有多大好处。 :-(

Installing/using C9.io 中 Nightwatch.js 的硒

Installing/using Selenium for Nightwatch.js in C9.io

selenium

cloud9-ide

nightwatch.js

安装 Selenium 的步骤

日志