First release with tests

tests/run-tests.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+set -ex
+
+function main {
+  build-image
+  run-ruby-tests
+}
+
+function cd-to-top-of-repo {
+  cd "$(git rev-parse --show-toplevel)"
+}
+
+function build-image {
+  cd-to-top-of-repo
+  docker build -t docker-swarm-autoscaler-tests ./tests
+}
+
+function run-ruby-tests {
+  cd-to-top-of-repo
+  echo 'INFO: Running rspec unit tests...'
+  local -r container_id=$(
+    docker create --rm \
+      -v /var/run/docker.sock:/var/run/docker.sock \
+      docker-swarm-autoscaler-tests \
+      bash -c "cd /root/tests && \
+      bundle exec rake spec"
+  )
+
+  docker cp . "${container_id}:/root/"
+
+  trap "docker rm ${container_id}" SIGHUP
+  docker start --attach --interactive "${container_id}"
+}
+
+[[ "${0}" == "${BASH_SOURCE[0]}" ]] && main "${@}"