Initial Docker support

Docker support for Wordpress Unit Testing

.env

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+WORDPRESS_DB_NAME=test
+WORDPRESS_DB_USER=test
+WORDPRESS_DB_PASSWORD=test
+
+MYSQL_ROOT_PASSWORD=test
+MYSQL_DATABASE=test
+MYSQL_USER=test
+MYSQL_PASSWORD=test

Dockerfile

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+FROM wordpress:php5.6
+
+RUN apt-get update && apt-get install -y less wget subversion mysql-client
+
+RUN wget https://phar.phpunit.de/phpunit-6.5.phar && \
+    chmod +x phpunit-6.5.phar && \
+    mv phpunit-6.5.phar /usr/local/bin/phpunit
+
+RUN curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar && \
+    chmod +x wp-cli.phar && \
+    mv wp-cli.phar /usr/local/bin/wp

docker-compose.yml

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+version: "2"
+services:
+    wordpress:
+        build:
+            context: .
+            dockerfile: Dockerfile
+        ports:
+            - "8888:80"
+        depends_on:
+            - db
+        environment:
+            WORDPRESS_DB_HOST: "db:3306"
+        env_file: .env
+        volumes:
+          - .:/var/www/html/wp-content/plugins/plugin
+          - for-testing:/tmp
+    db:
+        image: mysql:latest
+        env_file: .env
+        volumes:
+            - db-data:/var/lib/mysql
+
+volumes:
+    db-data:
+        driver: local
+    for-testing:
+        driver: local

phpcs.ruleset.xml

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+<?xml version="1.0"?>
+<ruleset name="WordPress Coding Standards for Plugins">
+	<description>Generally-applicable sniffs for WordPress plugins</description>
+
+	<rule ref="WordPress-Core" />
+	<rule ref="WordPress-Docs" />
+
+	<exclude-pattern>*/node_modules/*</exclude-pattern>
+	<exclude-pattern>*/vendor/*</exclude-pattern>
+</ruleset>