WP-CLI provides a command-line interface for many actions you might perform in the WordPress admin.
When building a site, it is important to test as many edge cases as possible. Theme Unit Test Data is the way to go here and a minimum requirement for any professionally built WordPress theme (in my opinion anyway) If building a theme for the wordpress.org theme repository this will almost certainly be tested. For those using WP-CLI, there is a quick and easy way to install and then remove this test data.
Naturally, you will need to install and setup WP-CLI before proceeding.
Go to the terminal and follow those commands.
Activate the WP Importer plugin.
wp plugin install wordpress-importer --activate
Make sure you have installed “wget” otherwise, install it.
For mac, install by Terminal
brew install wget
For the Linux (Ubuntu/CentOS)
sudo apt-get install wget or Yum install wget
Now download the theme unit test data XML file
wp import themeunittestdata.wordpress.xml --authors=create
It’ll take 1-5 minutes to depend on your internet speed.