硒错误：没有指定显示 [英] Selenium Error: no display specified

问题描述

我已经安装了selenium-server-standalone-2.42.2.jar在一个debian的虚拟文件夹中安装了Firefox 29.0

并尝试运行以下脚本，该脚本是目录中唯一的文件phpunit：

pre $ < ;？php
class TestLogin extends PHPUnit_Extensions_Selenium2TestCase {

public function setUp（）
{
$ this-> setHost（'localhost'）;
$ this-> setPort（4444）;
$ this-> setBrowser（'firefox'）;
$ this-> setBrowserUrl（'http：// debian-vm / phpUnitTutorial'）;


public function testHasLoginForm（）
{
$ this-> url（'index.php'）;

$ username = $ this-> byName（'username'）;
$ password = $ this-> byName（'password'）;

$ this-> assertEquals（''，$ username-> value（））;
$ this-> assertEquals（''，$ password-> value（））;




$ b我得到以下错误：



  1）TestLogin :: testHasLoginForm 
 PHPUnit_Extensions_Selenium2TestCase_WebDriverException：无法在45000 ms后连接到端口7055上的主机
 127.0.0.1。 Firefox控制台输出：
错误：未指定显示
错误：未指定显示
  

这是什么意思？

我有几个线程红色，显然我不得不做以下我试过：

1）在命令行中键入

  export PATH =：0; 
  

结果：我得到同样的错误。

< 2）我已经安装了vnc4server，并获得debian-vm：1作为应用程序，然后设置 export PATH = debian-vm：1 运行realvnc并在查看器（工作）我得到了同样的问题。

解决方案您收到此错误，因为您没有设置 DISPLAY 变量。这是一个指导如何在无头机器上执行测试。

您必须安装和浏览器优先：

  apt-get install xvfb 
 apt-get install firefox-mozilla-build 
  

然后启动Xvfb：

  Xvfb& 
  

set DISPLAY 并启动Selenium： p>

  export DISPLAY = localhost：0.0 
 java -jar selenium-server-standalone-2.44.0.jar 
  

然后您就可以运行您的测试。

I've installed selenium-server-standalone-2.42.2.jar in a debian virtual box

and installed Firefox 29.0

and trying to run the following script with phpunit which is the only file in the directory:

<?php
class TestLogin extends PHPUnit_Extensions_Selenium2TestCase{

    public function setUp()
    {
            $this->setHost('localhost');
            $this->setPort(4444);
            $this->setBrowser('firefox');
            $this->setBrowserUrl('http://debian-vm/phpUnitTutorial');
    }

    public function testHasLoginForm()
    {
            $this->url('index.php');

            $username = $this->byName('username');
            $password = $this->byName('password');

            $this->assertEquals('', $username->value());
            $this->assertEquals('', $password->value());
    }
}

I get the following error:

1) TestLogin::testHasLoginForm
PHPUnit_Extensions_Selenium2TestCase_WebDriverException: Unable to connect to host
127.0.0.1 on port 7055 after 45000 ms. Firefox console output:
Error: no display specified
Error: no display specified

What does this mean?

I've red several threads and apparently I had to do the following which I tried:

1)to type this in the command shell

export PATH=:0;

Result: I got the same error.

2) I've installed vnc4server and getting debian-vm:1 as a application I then set export PATH=debian-vm:1 run it with realvnc and in the viewer (which works) I got the same problem.

解决方案

You receive this error, because you have not set the DISPLAY variable. Here is a guide how to perform the test on a headless machine.

You have to install Xvfb and a browser first:

apt-get install xvfb
apt-get install firefox-mozilla-build

then start Xvfb:

Xvfb &

set DISPLAY and start Selenium:

export DISPLAY=localhost:0.0
java -jar selenium-server-standalone-2.44.0.jar

and then you will be able to run your tests.

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