Selenium 错误:未指定显示 [英] Selenium Error: no display specified

问题描述

我已经在 debian 虚拟机中安装了 selenium-server-standalone-2.42.2.jar

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

并安装了 Firefox 29.0

and installed Firefox 29.0

并尝试使用目录中唯一的文件 phpunit 运行以下脚本:

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());
    }
}

我收到以下错误:

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

这是什么意思?

我已经红色了几个线程，显然我必须执行以下我尝试过的操作:

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

1) 在命令 shell 中输入这个

1)to type this in the command shell

export PATH=:0;

结果:我遇到了同样的错误.

Result: I got the same error.

2) 我已经安装了 vnc4server 并将 debian-vm:1 作为应用程序我然后设置 export PATH=debian-vm:1 使用 realvnc 和在查看器中运行它(有效)我遇到了同样的问题.

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.

推荐答案

您收到此错误，因为您尚未设置 DISPLAY 变量.这是如何在无头机器上执行测试的指南.

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.

您必须先安装 Xvfb 和浏览器:

You have to install Xvfb and a browser first:

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

然后启动Xvfb:

Xvfb &

设置DISPLAY并启动Selenium:

set DISPLAY and start Selenium:

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

然后你就可以运行你的测试了.

and then you will be able to run your tests.

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