Skip to main content

About

This blog covers a wide array of topics, issues and solutions related to automated testing and system administration. Those are real issues which I have encountered during my career as a test automation engineer on different projects that use different technologies. I hope you find my blog useful.

Popular posts from this blog

Switching between keyboard layouts in Openbox (Arch Linux)

Switching between two (or more) keyboard layouts in Openbox DE is a task that's quite easy to accomplish, although it might not be so obvious as in other desktop environments. This solution was tested on Arch Linux. You just need to edit this file (assuming you want to switch between English and Ukrainian Phonetic layouts with Alt-Shift): /etc/X11/xorg.conf.d/01-keyboard-layout.conf Section "InputClass" Identifier "keyboard-layout" Driver "evdev" MatchIsKeyboard "yes" Option "XkbLayout" "us,ua(phonetic)" Option "XkbModel" "pc105" Option "XkbOptions" "grp:alt_shift_toggle" EndSection If you have Nvidia card, don't forget to edit /etc/X11/xorg.conf.d/20-nvidia.conf and change Driver from "kbd" to "evdev" in InputDevice section: Section "InputDevice" Identifier "Keyboard0" Driver "evdev" EndSection Y
Read more

Solution for com.jcraft.jsch.JSchException: reject HostKey problem on Ubuntu

Just a random investigation with a workaround. So trying to connect to SFTP server using jsch library, but getting a nasty com.jcraft.jsch.JSchException: reject HostKey exception. This host is already present in ~/.ssh/known_hosts file, so it should not be problem, but it is. It turns out this problem happens if SFTP server is running on Ubuntu and strictHostKey is set to true, but it doesn't happen on Linux Fedora. I suppose this is because host entries in the known_hosts file on Ubuntu are encrypted in a different way than in known_hosts on Fedora, so it cannot be recognized or decrypted by JSch library. Now all you need to do is manually add host entries to the file. Basically you just get the public key for the host where SFTP server is running using this command: ssh-keyscan -t rsa sftp_server_ip_address_or_hostname Then copy-paste the output to your local ~/.ssh/known_hosts file. That's all, it should work now. If it doesn't, try to empty known_hosts file complet
Read more

Accurate Word Counter for non-Latin characters in Javascript regex

There is a problem that involves Javascript and regular expressions. The JS implementation of regexp does not support Unicode properly, for example /\b\S+\b/g regular expression will not count words with Unicode characters of many national alphabets and scripts, such as Cyrillic, Greek and Hindi. Unfortunately \S is restricted to Latin-only characters of English alphabet. To solve this problem we must explicitly include all Unicode characters. My solution is to use /([\u0080-\uFFFF\w]\u0027?)+/g regular expression instead. It covers the wide range of Unicode characters (from 0080 to FFFF) that includes all national alphabets + apostrophe symbol (0027). This regex has been tested with the following sample text and it counts all 55 words accurately, ignoring all special characters and punctuation, I used https://regexr.com to test it with this sample text that includes words from several alphabets.
Read more