Add ruby gem test

tests_new/integration/roles/test_gem/meta/main.yml

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+dependencies: 
+  - prepare_tests
+

tests_new/integration/roles/test_gem/tasks/main.yml

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+# test code for the gem module
+# (c) 2014, James Tanner <tanner.jc@gmail.com>
+
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+- name: remove a gem
+  gem: name=gist state=absent
+
+- name: verify gist is not installed
+  shell: gem list | egrep '^gist '
+  register: uninstall
+  failed_when: "uninstall.rc != 1"
+ 
+- name: install a gem
+  gem: name=gist state=present
+  register: gem_result
+
+- name: verify module output properties
+  assert: 
+    that: 
+        - "'name' in gem_result"
+        - "'changed' in gem_result" 
+        - "'state' in gem_result" 
+
+- name: verify gist is installed
+  shell: gem list | egrep '^gist ' 
+     

tests_new/integration/test_destructive.sh

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+ansible-playbook destructive.yml -i inventory -e @integration_config.yml -v $*