Unable to use karma-electron with Xvfb

[track0x1]

Trying to run my unit tests headless on a linux box with electron but this doesn't let electron launch in Xvfb. :(

[twolfson]

Please make sure you are setting a DISPLAY environment variable that will be shared by Xvfb and karma. Here's the typical Travis CI setup:

https://docs.travis-ci.com/user/gui-and-headless-browsers/#Using-xvfb-to-Run-Tests-That-Require-a-GUI

and here it is working in this very repo with Travis CI (uses default npm test via Travis CI):

https://github.com/twolfson/karma-electron/blob/5.1.1/.travis.yml#L16-L22

There's also a cleaner variant suggested by Electron's docs:

https://github.com/electron/electron/blob/v1.4.10/docs/tutorial/testing-on-headless-ci.md

[track0x1]

I have DISPLAY defined and I can tell the display is configured properly because I can run firefox without an error. but this is what I see when I try karma:

$ ps -a
  PID TTY          TIME CMD
 2511 tty1     00:00:00 bash
13232 pts/1    00:00:00 Xvfb
13336 pts/1    00:00:00 ps

$ echo $DISPLAY
:99.0

$ ./node_modules/.bin/karma start ./karma.config.js --single-run
05 12 2016 11:27:27.981:INFO [karma]: Karma v1.3.0 server started at http://localhost:9876/
05 12 2016 11:27:27.983:INFO [launcher]: Launching browser Electron with unlimited concurrency
05 12 2016 11:27:28.085:INFO [launcher]: Starting browser Electron
05 12 2016 11:27:28.201:ERROR [launcher]: Cannot start Electron
	
05 12 2016 11:27:28.849:INFO [launcher]: Trying to start Electron again (1/2).
05 12 2016 11:27:28.889:ERROR [launcher]: Cannot start Electron
	
05 12 2016 11:27:28.910:INFO [launcher]: Trying to start Electron again (2/2).
05 12 2016 11:27:28.947:ERROR [launcher]: Cannot start Electron
	
05 12 2016 11:27:28.952:ERROR [launcher]: Electron failed 2 times (cannot start). Giving up.

[twolfson]

Maybe try running the electron executable directly to see if there's a better error message? It should be available at `./node_modules/.bin/electron` iirc

…

On Dec 5, 2016 8:30 AM, "Tom B" ***@***.***> wrote: I have DISPLAY defined and I can tell the display is configured properly because I can run firefox without an error. but this is what I see when I try karma: $ ps -a PID TTY TIME CMD 2511 tty1 00:00:00 bash 13232 pts/1 00:00:00 Xvfb 13336 pts/1 00:00:00 ps $ echo $DISPLAY :99.0 $ ./node_modules/.bin/karma start ./karma.config.js --single-run 05 12 2016 11:27:27.981:INFO [karma]: Karma v1.3.0 server started at http://localhost:9876/ 05 12 2016 11:27:27.983:INFO [launcher]: Launching browser Electron with unlimited concurrency 05 12 2016 11:27:28.085:INFO [launcher]: Starting browser Electron 05 12 2016 11:27:28.201:ERROR [launcher]: Cannot start Electron 05 12 2016 11:27:28.849:INFO [launcher]: Trying to start Electron again (1/2). 05 12 2016 11:27:28.889:ERROR [launcher]: Cannot start Electron 05 12 2016 11:27:28.910:INFO [launcher]: Trying to start Electron again (2/2). 05 12 2016 11:27:28.947:ERROR [launcher]: Cannot start Electron 05 12 2016 11:27:28.952:ERROR [launcher]: Electron failed 2 times (cannot start). Giving up. — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#17 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AA3FWLcBSbXMlFhg35iqaRT14nEOa16Lks5rFDwQgaJpZM4LC6lL> .

[track0x1]

Sweet! Found out that I needed to install libXss. Did that and it works! Thanks :)

[sanbor]

Here is the list of dependencies in Debian (from segment-boneyard/nightmare#224 (comment)):

xvfb
libgtk2.0-0
libgconf-2-4
libasound2
libxtst6
libxss1
libnss3

Here is a Dockerfile with the dependencies for CentOS. I had to install the following dependencies in CentOS 7:

yum install -y \
  libX11-devel.x86_64 \
  pixman-devel.x86_64 \
  libdrm-devel.x86_64 \
  mesa-libGL-devel.x86_64 \
  openssl-devel.x86_64 \
  xorg-x11-xtrans-devel.noarch \
  libXfont-devel.x86_64 \
  libxkbfile-devel.x86_64 \
  libpciaccess-devel.x86_64 \
  xorg-x11-utils \
  libXtst-devel.x86_64 \
  libjpeg-turbo-devel.x86_64 \
  gtk2-2.24.28-8.el7.x86_64 \
  libXScrnSaver-1.2.2-6.1.el7.x86_64 \
  GConf2-3.2.6-8.el7.x86_64 \
  alsa-lib-1.1.1-1.el7.x86_64 \
  'gnu-free-sans-fonts'