For the step 2:
you should add:
"The database $DB_NAME should be already created"
For the step 3 you should mention where phpunit must run from:
Go to your magento root directory and run unit tests for the first time to install test database by running phpunit. It should take about 3 minutes.
$ phpunit
For the step 2: you should add: "The database $DB_NAME should be already created"
For the step 3 you should mention where phpunit must run from:
Spent some time to figure it out.