How to start behavior tests for powermail?

Preperations

First of all, do a composer update in powermail root folder
You have to install a local TYPO3-instance in the next step and it should be available under powermail102. localhost.de
Move (or symlink) the powermail-Folder into typo3conf/ext/ and activate the extension.
Then import the database dump from http://powermail.in2code.ws/fileadmin/behat/powermail.sql.gz

Command line

Start Selenium

Download geckodriver from https://github.com/mozilla/geckodriver/releases, make it executable and move it to /usr/local/bin/
Open a console and go to EXT:powermail/Tests/Behavior/
Start a selenium server with sh selenium.sh
As an alternative, you could specify which browser version should be used (if you installed a second firefox - probably older then quantum) - in my case: java -jar ../../.Build/vendor/se/selenium-server-standalone/bin/selenium-server-standalone.jar -Dwebdriver.firefox.bin="/var/www/Webtools/firefox/42/firefox"

Start Behat

Open another console and go to EXT:powermail/Tests/Behavior/
Start behat with sh behat.sh or with sh behats.sh (for stopping on first failure)
As an alternative, you could specify a single test by its tag like sh behatt.sh Pi1Default (to start all tests @Pi1Default)

Screenshot

Screen from the huge testparcours that has to be passed before every release:

Behaviour tests with docker

Using ddev

Run the following commands in the project root

ddev start
ddev initialize

Then ssh into ddev ddev ssh and then run the behat tests via composer

composer run test:behaviour:ddev

"Plain" docker

Prerequisite: https://github.com/codekitchen/dinghy-http-proxy
This is a local proxy, that enables you to run multiple docker projects in parallel
Run make install-project
Run make login-php

In the container run

composer run test:behaviour:docker