Adding test Coverage for mysql_variable module

Use mysql_variable to query, set and update variables.
Assert using user and password to query, set and update  variables.
Assert using single quotes, double quotes and no quotes  when using variables

test/integration/roles/test_mysql_variables/tasks/assert_var.yml

@@ -0,0 +1,36 @@
+# test code to assert variables in mysql_variables module
+# (c) 2014,  Wayne Rosario <wrosario@ansible.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/>.
+
+# ============================================================
+# Assert mysql variable name and value from mysql database
+#
+- name: assert output message changed value 
+  assert: { that: "output.changed == {{changed}}" }
+
+- name: run mysql command to show variable 
+  command: mysql "-e show variables like '{{var_name}}';"
+  register: result
+
+- name: assert output mysql variable name and value
+  assert:
+    that:
+       - "result.changed == true"
+       - "'{{var_name}}' in result.stdout"
+       - "'{{var_value}}' in result.stdout"
+
+