Running headless firefox Xvfb with Jenkins to run selenium tests

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I face with Error: no display specified error when running play framework tests in Jenkins at FreeBSD server. So every time I face with timeout

org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox

Jenkins has:

1) Xvfb plugin installed

2) Play Framework installed

Tests are written using selenide library and selenide module for play framework.

Xvfb configured and enabled in job configuration.

Job console output is:

Checking out Revision 3f485bd2e3dbcfa058fc19f89ab18020e36707d8 (origin/trunk)
...
Xvfb starting$ /usr/local/bin//Xvfb :1 -screen 0  -fbdir /usr/local/jenkins/xvfb-9-786185694297443042.fbdir
...
Command detected: clean
Command detected: deps --sync
Command detected: precompile
Command detected: auto-test
[YalsTests] $ /srv/java/play/play clean
...
~ using java version "1.8.0_72"
[YalsTests] $ /srv/java/play/play auto-test
~ 14 tests to run:
~
~ selenium/front/CorrectInput...         org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:
Error: no display specified

    at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:113)
    at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:271)

Job configuration:

[X] Start Xvfb before the build, and shut it down after.
Xvfb specific display name  1
Xvfb display name offset 0

Invoke Play Framework       
Command set     Play 1.x 
Goals   
    Clean project [clean]
    Custom parameter
         Custom command deps --sync
    Precompile all Java sources and templates [precompile]
    Automatically run all application tests [auto-test]
selenide jenkins selenium firefox
3 Answers

I tend to supply this if I'm running my tests via Jenkins:

xvfb-run --server-args="-screen 0, 1920x1080x16" mvn clean install...

One thing that has tripped me up in the past is that while xvfb-run will create a virtual display, it can really screw up your screenshots and web interactions if it isn't sized correctly, so it's usually advisable to supply a resolution size which will suitably display your browser.

user_93505660
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