This PR:

• adds a new field "description" to theme.json top level to translate
• updates the expectation to existing behat tests

TODO

• Check test instructions (this is my first PR)
• Have the Core PR tested and committed

Context

A "description" key was added to theme.json in WordPress/gutenberg#45242

The Gutenberg PR was synced to Core in WordPress/wordpress-develop#4687

Unfortunately, a corresponding entry to the theme.json i18n schema was not part of the change.

Core trac ticket: https://core.trac.wordpress.org/ticket/61543

Testing

Set up

• See make.wordpress.org/cli/handbook/contributions/pull-requests/#setting-up
• Install and prepare dependencies:

brew install jq mysql
brew service start mysql
mysql_secure_installation
sudo mysql -u root -p
# MySQL Session
CREATE DATABASE IF NOT EXISTS `wp_cli_test`;
CREATE USER 'wp_cli_test'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password1';
GRANT ALL PRIVILEGES ON wp_cli_test.* TO "wp_cli_test"@"localhost";
\q

Before running any of the test (manual or automatic), make sure to set the THEME_JSON_SOURCE to '' (empty string) so the ThemeJsonExtractor picks the the local backup file with the changes at assets/theme-i18n.json.

Automated tests:

composer install
composer behat -- features/makepot.feature

Manual tests:

Create a new directory called foo-theme that contains a theme.json file with the following contents:

{
    "description": "My style variation description"
}

Run vendor/bin/wp i18n make-pot foo-theme

Verify that there's a foo-theme/foo-theme.pot file and that the "My style variation description" string is present as well as its context "Style variation description".

You should see something like:

msgctxt "Style variation description"
msgid "My style variation description"
msgstr ""