Running SilverStripe Tests Locally For a Module Using Docker

.env

# Generated by SilverStripe Installer
SS_BASE_URL="http://localhost"
SS_DATABASE_CLASS="MySQLPDODatabase"
SS_DATABASE_NAME="unittesting"
SS_DATABASE_PASSWORD=""
SS_DATABASE_SERVER="database"
SS_DATABASE_USERNAME="root"
SS_ENVIRONMENT_TYPE="dev"

docker-compose.yml

version: '2'
services:
 web:
 #  build:
 #    context: ./docker-ss
   image: brettt89/silverstripe-web:7.1-platform
   working_dir: /var/www
   volumes:
    - .:/var/www/html
   ports:
    - "80:80"
 database:
   image: mariadb
   volumes:
    - ~/srv/docker/data/mysql/suilven/testing:/var/lib/mysql
   restart: always
   environment:
    - MYSQL_ALLOW_EMPTY_PASSWORD=true

gistfile1.txt

Get a bash shell on the web container
```
sudo docker-compose exec web /bin/bash
```

Clone your module
```
cd /var/www/html/ && git clone <your module>
```

Execute commands from either Travis or Ciricle CI, this is an example.  Note the last step may take likes of 10 mins.
```
composer validate
composer require --prefer-source --no-update silverstripe/recipe-cms:1.1.x-dev
composer install --prefer-source --no-interaction --no-progress --no-suggest --optimize-autoloader --verbose --profile
```

Run your tests!
```
phpdbg -qrr vendor/bin/phpunit -d memory_limit=512M --coverage-clover=coverage.xml tests/
```

Optionally upload coverage
```
bash <(curl -s https://codecov.io/bash) -f coverage.xml
```