Had to specify mysql socket to run php automated test

[mmarco9]

I had to add mysql socket information to be able to run phpunit. Without it, phpunit complained that it could not connect to database. Hopefully someone can confirm this and add this information to the docs.

Example in wp-tests-config.php:
define( 'DB_HOST', 'localhost:/Applications/MAMP/tmp/mysql/mysql.sock' );

I followed all the instructions from here: ​https://make.wordpress.org/core/handbook/testing/automated-testing/phpunit/ . I am using MacOS Catalina 10.15.2.