Run Travis CI tests within docker container

.travis.yml

@@ -1,17 +1,9 @@
 ---
+sudo: required
 language: bash
-# addons:
+services:
-#   apt:
+  - docker
-#     sources:
-#     - debian-sid
-#     packages:
-#     - shellcheck
 before_install:
-  - sudo add-apt-repository ppa:duggan/bats --yes
+  - docker pull yadm/testbed:latest
-  - sudo apt-get update -qq
-  - sudo apt-get install -qq bats
-  - sudo apt-get install -qq gnupg
-  - sudo apt-get install -qq expect
 script:
-  # - make test
+  - docker run --rm -v "$PWD:/yadm:ro" yadm/testbed
-  - make bats