Add functional tests

This relies on zaza updates landing.

https://github.com/gnuoy/zaza/tree/functest-utils
https://github.com/gnuoy/zaza/tree/functest-utils-vault

Change-Id: Iebb2415077b682dfdf590b4b5f35a3c593ed3d69

src/metadata.yaml

@@ -12,6 +12,7 @@ description: |
   credentials, SQL/NoSQL databases, X.509 certificates,
   SSH credentials, and more.
 series:
+  - bionic
   - xenial
 tags:
   - security

src/test-requirements.txt

@@ -0,0 +1,2 @@
+# zaza
+git+https://github.com/openstack-charmers/zaza.git#egg=zaza

src/tests/bundles/xenial.yaml

@@ -0,0 +1,12 @@
+series: xenial
+services:
+  vault:
+    num_units: 1
+    series: xenial
+    charm: ../../../vault
+  postgresql:
+    charm: cs:postgresql
+    num_units: 1
+relations:
+- - vault:db
+  - postgresql:db

src/tests/tests.yaml

@@ -0,0 +1,9 @@
+charm_name: vault
+tests:
+  - zaza.charm_tests.vault.tests.VaultTest
+configure:
+  - zaza.charm_tests.vault.setup.basic_setup
+gate_bundles:
+  - xenial
+dev_bundles:
+  - bionic

src/tox.ini

@@ -0,0 +1,35 @@
+[tox]
+envlist = pep8
+skipsdist = True
+
+[testenv]
+setenv = VIRTUAL_ENV={envdir}
+         PYTHONHASHSEED=0
+whitelist_externals = juju
+passenv = HOME TERM CS_API_*
+deps = -r{toxinidir}/test-requirements.txt
+install_command =
+  pip install {opts} {packages}
+
+[testenv:pep8]
+basepython = python2.7
+deps=charm-tools
+commands = charm-proof
+
+[testenv:func-noop]
+basepython = python3
+commands =
+    true
+
+[testenv:func]
+basepython = python3
+commands =
+    functest-run-suite --keep-model
+
+[testenv:func-smoke]
+basepython = python3
+commands =
+    functest-run-suite --keep-model
+
+[testenv:venv]
+commands = {posargs}