Add CI Testing (#3)

* Add testing to role

Testing is based on how geerlingguy test roles.

* Add fancy README badge.

.gitignore

@@ -0,0 +1,2 @@
+tests/test.sh
+*.retry

.travis.yml

@@ -0,0 +1,14 @@
+---
+services: docker
+
+env:
+  - distro: centos7
+  - distro: ubuntu1604
+
+script:
+  # Download test shim.
+  - wget -O ${PWD}/tests/test.sh https://gist.githubusercontent.com/geerlingguy/73ef1e5ee45d8694570f334be385e181/raw/
+  - chmod +x ${PWD}/tests/test.sh
+
+  # Run tests.
+  - ${PWD}/tests/test.sh

README.md

@@ -1,4 +1,4 @@
-# Ansible Role: Grok
+# Ansible Role: Grok [![Build Status](https://travis-ci.org/Islandora-Devops/ansible-role-grok.svg?branch=master)](https://travis-ci.org/Islandora-Devops/ansible-role-grok)
 
 An Ansible role that installs [Grok](https://github.com/GrokImageCompression/grok) on:
 
@@ -21,14 +21,16 @@ grok_version_tag: v2.3.0
 
 ## Dependencies
 
-* None
+* Playbook requires the following applciations to be installed: 
+  - git
+  - build-essential (gcc, g++, make)
 
 ## Example Playbook
 
     - hosts: webservers
       roles:
-        - { role: islandora.grok }
+        - islandora.grok
 
 ## License
 
-MIT
+MIT

tasks/install.yml

@@ -3,6 +3,8 @@
 - name: Install Grok dependencies (apt)
   apt:
     name: "{{ item }}"
+    update_cache: yes
+    cache_valid_time: 600
   with_items:
     - cmake
     - libpng16-dev

tests/test.yml

@@ -0,0 +1,26 @@
+---
+- hosts: all
+
+  pre_tasks:
+    - name: Install dependancies (apt)
+      apt:
+        update_cache: yes
+        cache_valid_time: 600
+        name: "{{ item }}"
+      with_items:
+        - git
+        - build-essential
+      when: ansible_os_family == 'Debian'
+
+    - name: Install dependancies (yum)
+      yum:
+        name: "{{ item }}"
+      with_items:
+        - git
+        - gcc
+        - gcc-c++
+        - make
+      when: ansible_os_family == 'RedHat'
+
+  roles:
+    - role_under_test