Experimental Cucumber Tests fo YaST and libyui
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Experimental Cucumber Tests for YaST

Here are some experimental Cucumber tests for YaST or plain libyui applications.

⚠️ Security ⚠️

The libyui REST API currently does not implement any authentication, anybody who can access the API port has full control of the running application. This is especially critical for YaST which usually runs with the administrator (root) permissions!

Installing libyui

These tests require experimental REST API support in the libyui library which is available in the http_server branches in libyui Git repositories or you can install the experimental RPM packages for the openSUSE Leap 15.0 distribution.

Run as root user:

zypper ar -f https://download.opensuse.org/repositories/home:/lslezak:/libyui-rest-api/openSUSE_Leap_15.0/ libyui
rpm --import https://build.opensuse.org/projects/home:lslezak:libyui-rest-api/public_key
zypper dup --from libyui --allow-vendor-change

⚠️ Use at your risk! The packages are experimental and should not be used in production systems! 🔥

Then you can do a quick test to see if the REST API works, run any YaST module:

YUI_HTTP_PORT=14155 yast2 repositories

While the YaST is running you can dump the current dialog content in JSON format using this command on the same machine:

curl -i http://localhost:14155/dialog

Installing Cucumber Ruby Gem

Checkout this Git repository and install the needed Ruby gems using bundler locally:

git clone https://github.com/lslezak/cucumber-yast.git
cd cucumber-yast
bundle install --path ./.vendor/bundler

Running the Tests

Testing Locally

  • Run the test (as root):

    bundle exec cucumber features/repository_add_new_repo.feature

    Add Repository Screencast

Testing a Remote Instance

Because the libyui REST API uses an HTTP server which can be accessed remotely then it is easy to run the tests on a different machine. That means you can even test an YaST installation running in a virtual machine.

To allow remote access to the API you need to additionally set the variable YUI_HTTP_REMOTE=1, otherwise the API will be available only locally. You might also need to open the used port in firewall.

⚠️ For security reasons enable remote access only in a trusted network or in a testing machine, using a virtual machine is highly recommended.

Testing the YaST Installer

To include the REST API support in the openSUSE Leap 15.0 installer boot the installer with these extra parameters:

YUI_HTTP_PORT=14155 YUI_HTTP_REMOTE=1 selfupdate=https://download.opensuse.org/repositories/home:/lslezak:/libyui-rest-api/openSUSE_Leap_15.0/

This will update the YaST installer with the packages from the specified repositories. You will need to import an unknown GPG key during the process.

Then YaST restarts and the REST API should be available from outside.


  • Start a patched openSUSE Leap 15.0 installer as described above
  • Run the test:
    bundle exec cucumber features/leap15_installation.feature

Leap 15.0 Installation

Testing a Plain libyui Application

Cucumber tests can be written also for any application which uses the libyui framework.

The features/libyui_manywidgets.feature contains a test for the ManyWidgets.cc example.

How to start it (change the path to the example):

"xterm -geometry 80x30 -e libyui/libyui/build/examples/ManyWidgets" \
cucumber -s features/libyui_manywidgets.feature 2> /dev/null

Libyui ManyWidgets Example