Add test Travis config

.travis.yml

@@ -0,0 +1,9 @@
+# Setting sudo access to false will let Travis CI use containers
+# rather than VMs to run the tests. For more details see:
+# https://docs.travis-ci.com/user/reference/overview/
+sudo: false
+
+script:
+  - cd tests
+  - ./unittest.sh
+  - git diff --exit-code