Merge pull request #529 from x3ro/docker-testrunner

[WIP] Docker test runner

test/docker/Dockerfile

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+FROM php:5.6-cli
+
+RUN export DEBIAN_FRONTEND=noninteractive; \
+    apt-get update; \
+    apt-get -qq install openssh-server sudo
+
+ENV DEPLOYER_USERNAME deployer
+ENV DEPLOYER_PASSWORD deployer_password
+
+RUN useradd --create-home --base-dir /home "${DEPLOYER_USERNAME}"
+RUN echo "${DEPLOYER_USERNAME}:${DEPLOYER_PASSWORD}" | chpasswd
+RUN echo "deployer ALL=NOPASSWD: ALL" >> /etc/sudoers
+
+USER deployer
+RUN mkdir -p ~/.ssh
+RUN ssh-keygen -b 2048 -t rsa -f ~/.ssh/id_rsa -q -N ""
+RUN cat ~/.ssh/id_rsa.pub > ~/.ssh/authorized_keys
+
+RUN chmod 600 ~/.ssh/*

test/docker/README.md

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+# Running tests with docker
+
+If you have docker installed on your local system, just run `test/docker/run.sh` from the root of the repository.
+
+If you cannot or don't want to install docker locally, you can use [docker machine](https://docs.docker.com/machine/) do run the tests inside a VM or e.g. a Digital Ocean container. After having created a docker machine (lets say you called it `default`), just load its environment:
+
+    eval "$(docker-machine env default)"
+
+Now you can run `test/docker/run.sh` as if docker was installed locally. Or maybe you just want to run a single test?
+
+    test/docker/run.sh --filter TaskTest::testTask
+
+Or all tests that contain the word "parallel":
+
+    test/docker/run.sh --filter parallel
+
+All parameters are directly passed to the `phpunit` command line tool as documented [here](https://phpunit.de/manual/current/en/textui.html).

test/docker/docker-bootstrap.sh

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+#!/bin/bash -xe
+
+sudo service ssh start
+
+eval `ssh-agent`
+ssh-add
+ssh-keyscan -t rsa localhost > ~/.ssh/known_hosts
+
+cd ~/deployer && vendor/phpunit/phpunit/phpunit $@

test/docker/run.sh

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+#!/bin/bash
+
+if [ ! -f composer.json ]; then
+    echo "Please run this from the deployer repository root"
+    exit 1
+fi
+
+composer install &&
+    docker build -t deployer-5.6 test/docker &&
+    docker run -v $(pwd):/home/deployer/deployer -i -t deployer-5.6 \
+        /home/deployer/deployer/test/docker/docker-bootstrap.sh $@