ansible/test/integration/roles/test_var_blending/tasks/main.yml

# test code 
# (c) 2014, Michael DeHaan <michael.dehaan@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/>.

- include_vars: more_vars.yml

- name: deploy a template that will use variables at various levels
  template: src=foo.j2 dest={{output_dir}}/foo.templated 
  register: template_result

- name: copy known good into place
  copy: src=foo.txt dest={{output_dir}}/foo.txt

- name: compare templated file to known good
  shell: diff {{output_dir}}/foo.templated {{output_dir}}/foo.txt
  register: diff_result

- name: verify templated file matches known good
  assert:  
    that: 
        - 'diff_result.stdout == ""' 

- name: check debug variable with same name as var content
  debug: var=same_value_as_var_name_var
  register: same_value_as_var_name

- name: check debug variable output when variable is undefined
  debug: var=undefined_variable
  register: var_undefined

- assert:
    that:
      - var_undefined.undefined_variable == 'VARIABLE IS NOT DEFINED!'
      - same_value_as_var_name.same_value_as_var_name_var == 'same_value_as_var_name_var'