database.yml.ci

test:
 adapter: mysql2
 encoding: utf8
 pool: 5
 username: <%= ENV.fetch("MYSQL_USER", "root") %>
 password:
 host: <%= ENV.fetch("MYSQL_HOST", "127.0.0.1") %>
 port: <%= ENV.fetch("MYSQL_PORT", "3306") %>
 database: <%= ENV.fetch("MYSQL_DATABASE", "circleci-example-for-rails_test") %>