Operate accessories

When you want mysql, redis, and the like under MRSK management

test/cli/accessory_test.rb

@@ -0,0 +1,13 @@
+require "test_helper"
+require "active_support/testing/stream"
+require "mrsk/cli"
+
+class CliAccessoryTest < ActiveSupport::TestCase
+  include ActiveSupport::Testing::Stream
+
+  test "boot" do
+    command = stdouted { Mrsk::Cli::Accessory.start(["boot", "mysql", "-c", "test/fixtures/deploy_with_accessories.yml"]) }
+    
+    assert_match "Running docker run --name app-mysql -d --restart unless-stopped -p 3306:3306 --volume /var/lib/mysql:/var/lib/mysql --label service=app-mysql mysql:5.7 on 1.1.1.3", command
+  end
+end