TestPlayBook.py

# tests are fairly 'live' (but safe to run)
# setup authorized_keys for logged in user such
# that the user can log in as themselves before running tests

import unittest
import getpass
import ansible.playbook
import ansible.utils as utils
import ansible.callbacks as ans_callbacks
import os
import shutil
import ansible.constants as C

EVENTS = []

class TestCallbacks(object):
    # using same callbacks class for both runner and playbook

    def __init__(self):
        pass

    def set_playbook(self, playbook):
        self.playbook = playbook

    def on_no_hosts_remaining(self):
        pass

    def on_start(self):
        EVENTS.append('start')

    def on_skipped(self, host, item=None):
        EVENTS.append([ 'skipped', [ host ]])

    def on_import_for_host(self, host, filename):
        EVENTS.append([ 'import', [ host, filename ]])

    def on_error(self, host, msg):
        EVENTS.append([ 'stderr', [ host, msg ]])

    def on_not_import_for_host(self, host, missing_filename):
        pass

    def on_notify(self, host, handler):
        EVENTS.append([ 'notify', [ host, handler ]])

    def on_task_start(self, name, is_conditional):
        EVENTS.append([ 'task start', [ name, is_conditional ]])

    def on_failed(self, host, results, ignore_errors):
        EVENTS.append([ 'failed', [ host, results, ignore_errors ]])

    def on_ok(self, host, result):
        # delete certain info from host_result to make test comparisons easier
        host_result = result.copy()
        for k in [ 'ansible_job_id', 'results_file', 'md5sum', 'delta', 'start', 'end' ]:
            if k in host_result:
                del host_result[k]
        for k in host_result.keys():
            if k.startswith('facter_') or k.startswith('ohai_'):
                del host_result[k]
        EVENTS.append([ 'ok', [ host, host_result ]])

    def on_play_start(self, pattern):
        EVENTS.append([ 'play start', [ pattern ]])

    def on_async_ok(self, host, res, jid):
        EVENTS.append([ 'async ok', [ host ]])

    def on_async_poll(self, host, res, jid, clock):
        EVENTS.append([ 'async poll', [ host ]])

    def on_async_failed(self, host, res, jid):
        EVENTS.append([ 'async failed', [ host ]])

    def on_unreachable(self, host, msg):
        EVENTS.append([ 'failed/dark', [ host, msg ]])

    def on_setup(self):
        pass

    def on_no_hosts(self):
        pass

class TestPlaybook(unittest.TestCase):

   def setUp(self):
       self.user = getpass.getuser()
       self.cwd = os.getcwd()
       self.test_dir = os.path.join(self.cwd, 'test')
       self.stage_dir = self._prepare_stage_dir()

       if os.path.exists('/tmp/ansible_test_data_copy.out'):
           os.unlink('/tmp/ansible_test_data_copy.out')
       if os.path.exists('/tmp/ansible_test_data_template.out'):
           os.unlink('/tmp/ansible_test_data_template.out')
       if os.path.exists('/tmp/ansible_test_messages.out'):
           os.unlink('/tmp/ansible_test_messages.out')
       if os.path.exists('/tmp/ansible_test_role_messages.out'):
           os.unlink('/tmp/ansible_test_role_messages.out')

   def _prepare_stage_dir(self):
       stage_path = os.path.join(self.test_dir, 'test_data')
       if os.path.exists(stage_path):
           shutil.rmtree(stage_path, ignore_errors=False)
           assert not os.path.exists(stage_path)
       os.makedirs(stage_path)
       assert os.path.exists(stage_path)
       return stage_path

   def _get_test_file(self, filename):
       # get a file inside the test input directory
       filename = os.path.join(self.test_dir, filename)
       assert os.path.exists(filename)
       return filename

   def _get_stage_file(self, filename):
       # get a file inside the test output directory
       filename = os.path.join(self.stage_dir, filename)
       return filename

   def _run(self, test_playbook, host_list='test/ansible_hosts', 
            extra_vars=None):
       ''' run a module and get the localhost results '''
       # This ensures tests are independent of eachother
       global EVENTS
       ansible.playbook.SETUP_CACHE.clear()
       EVENTS = []

       self.test_callbacks = TestCallbacks()
       self.playbook = ansible.playbook.PlayBook(
           playbook     = test_playbook,
           host_list    = host_list,
           module_path  = 'library/',
           forks        = 1,
           timeout      = 5,
           remote_user  = self.user,
           remote_pass  = None,
           extra_vars   = extra_vars,
           stats            = ans_callbacks.AggregateStats(),
           callbacks        = self.test_callbacks,
           runner_callbacks = self.test_callbacks
       )
       result = self.playbook.run()
       return result

   def test_playbook_vars(self):
       test_callbacks = TestCallbacks()
       playbook = ansible.playbook.PlayBook(
           playbook=os.path.join(self.test_dir, 'test_playbook_vars', 'playbook.yml'),
           host_list='test/test_playbook_vars/hosts',
           stats=ans_callbacks.AggregateStats(),
           callbacks=test_callbacks,
           runner_callbacks=test_callbacks
       )
       playbook.run()

   def _test_playbook_undefined_vars(self, playbook, fail_on_undefined):
       # save DEFAULT_UNDEFINED_VAR_BEHAVIOR so we can restore it in the end of the test
       saved_undefined_var_behavior = C.DEFAULT_UNDEFINED_VAR_BEHAVIOR
       C.DEFAULT_UNDEFINED_VAR_BEHAVIOR = fail_on_undefined

       test_callbacks = TestCallbacks()
       playbook = ansible.playbook.PlayBook(
           playbook=os.path.join(self.test_dir, 'test_playbook_undefined_vars', playbook),
           host_list='test/test_playbook_undefined_vars/hosts',
           stats=ans_callbacks.AggregateStats(),
           callbacks=test_callbacks,
           runner_callbacks=test_callbacks
       )
       actual = playbook.run()

       C.DEFAULT_UNDEFINED_VAR_BEHAVIOR = saved_undefined_var_behavior

       # if different, this will output to screen
       print "**ACTUAL**"
       print utils.jsonify(actual, format=True)
       expected =  {
           "localhost": {
               "changed": 0,
               "failures": 0,
               "ok": int(not fail_on_undefined) + 1,
               "skipped": 0,
               "unreachable": int(fail_on_undefined)
           }
       }
       print "**EXPECTED**"
       print utils.jsonify(expected, format=True)

       assert utils.jsonify(expected, format=True) == utils.jsonify(actual, format=True)

   #def test_playbook_undefined_vars1_ignore(self):
   #    self._test_playbook_undefined_vars('playbook1.yml', False)

   #def test_playbook_undefined_vars1_fail(self):
   #    self._test_playbook_undefined_vars('playbook1.yml', True)

   #def test_playbook_undefined_vars2_ignore(self):
   #    self._test_playbook_undefined_vars('playbook2.yml', False)

   #def test_playbook_undefined_vars2_fail(self):
   #    self._test_playbook_undefined_vars('playbook2.yml', True)

   def test_yaml_hosts_list(self):
       # Make sure playbooks support hosts: [host1, host2]
       # TODO: Actually run the play on more than one host
       test_callbacks = TestCallbacks()
       playbook = ansible.playbook.PlayBook(
           playbook=os.path.join(self.test_dir, 'hosts_list.yml'),
           host_list='test/ansible_hosts',
           stats=ans_callbacks.AggregateStats(),
           callbacks=test_callbacks,
           runner_callbacks=test_callbacks
       )
       play = ansible.playbook.Play(playbook, playbook.playbook[0], os.getcwd())
       assert play.hosts == ';'.join(('host1', 'host2', 'host3'))

   def test_playbook_hash_replace(self):
      # save default hash behavior so we can restore it in the end of the test
      saved_hash_behavior = C.DEFAULT_HASH_BEHAVIOUR
      C.DEFAULT_HASH_BEHAVIOUR = "replace"

      test_callbacks = TestCallbacks()
      playbook = ansible.playbook.PlayBook(
          playbook=os.path.join(self.test_dir, 'test_hash_behavior', 'playbook.yml'),
          host_list='test/ansible_hosts',
          stats=ans_callbacks.AggregateStats(),
          callbacks=test_callbacks,
          runner_callbacks=test_callbacks
      )
      playbook.run()

      filename = '/tmp/ansible_test_messages.out'
      expected_lines = [
        "goodbye: Goodbye World!"
      ]
      self._compare_file_output(filename, expected_lines)

      filename = '/tmp/ansible_test_role_messages.out'
      expected_lines = [
        "inside_a_role: Indeed!"
      ]
      self._compare_file_output(filename, expected_lines)

      # restore default hash behavior
      C.DEFAULT_HASH_BEHAVIOUR = saved_hash_behavior

   def test_playbook_hash_merge(self):
      # save default hash behavior so we can restore it in the end of the test
      saved_hash_behavior = C.DEFAULT_HASH_BEHAVIOUR
      C.DEFAULT_HASH_BEHAVIOUR = "merge"

      test_callbacks = TestCallbacks()
      playbook = ansible.playbook.PlayBook(
          playbook=os.path.join(self.test_dir, 'test_hash_behavior', 'playbook.yml'),
          host_list='test/ansible_hosts',
          stats=ans_callbacks.AggregateStats(),
          callbacks=test_callbacks,
          runner_callbacks=test_callbacks
      )
      playbook.run()

      filename = '/tmp/ansible_test_messages.out'
      expected_lines = [
        "goodbye: Goodbye World!",
        "hello: Hello World!"
      ]
      self._compare_file_output(filename, expected_lines)

      filename = '/tmp/ansible_test_role_messages.out'
      expected_lines = [
        "goodbye: Goodbye World!",
        "hello: Hello World!",
        "inside_a_role: Indeed!"
      ]
      self._compare_file_output(filename, expected_lines)

      # restore default hash behavior
      C.DEFAULT_HASH_BEHAVIOUR = saved_hash_behavior

   def test_playbook_ignore_errors(self):
       test_callbacks = TestCallbacks()
       playbook = ansible.playbook.PlayBook(
           playbook=os.path.join(self.test_dir, 'playbook-ignore-errors.yml'),
           host_list='test/ansible_hosts',
           stats=ans_callbacks.AggregateStats(),
           callbacks=test_callbacks,
           runner_callbacks=test_callbacks
       )
       actual = playbook.run()

       # if different, this will output to screen
       print "**ACTUAL**"
       print utils.jsonify(actual, format=True)
       expected =  {
           "localhost": {
               "changed": 1,
               "failures": 1,
               "ok": 1,
               "skipped": 0,
               "unreachable": 0
           }
       }
       print "**EXPECTED**"
       print utils.jsonify(expected, format=True)

       assert utils.jsonify(expected, format=True) == utils.jsonify(actual,format=True)

   def test_playbook_changed_when(self):
       test_callbacks = TestCallbacks()
       playbook = ansible.playbook.PlayBook(
           playbook=os.path.join(self.test_dir, 'playbook-changed_when.yml'),
           host_list='test/ansible_hosts',
           stats=ans_callbacks.AggregateStats(),
           callbacks=test_callbacks,
           runner_callbacks=test_callbacks
       )
       actual = playbook.run()

       # if different, this will output to screen
       print "**ACTUAL**"
       print utils.jsonify(actual, format=True)
       expected =  {
           "localhost": {
               "changed": 3,
               "failures": 0,
               "ok": 6,
               "skipped": 0,
               "unreachable": 0
           }
       }
       print "**EXPECTED**"
       print utils.jsonify(expected, format=True)

       assert utils.jsonify(expected, format=True) == utils.jsonify(actual,format=True)

   def test_playbook_failed_when(self):
       test_callbacks = TestCallbacks()
       playbook = ansible.playbook.PlayBook(
           playbook=os.path.join(self.test_dir, 'playbook-failed_when.yml'),
           host_list='test/ansible_hosts',
           stats=ans_callbacks.AggregateStats(),
           callbacks=test_callbacks,
           runner_callbacks=test_callbacks
       )
       actual = playbook.run()

       # if different, this will output to screen
       print "**ACTUAL**"
       print utils.jsonify(actual, format=True)
       expected =  {
           "localhost": {
               "changed": 2,
               "failures": 1,
               "ok": 2,
               "skipped": 0,
               "unreachable": 0
           }
       }
       print "**EXPECTED**"
       print utils.jsonify(expected, format=True)

       assert utils.jsonify(expected, format=True) == utils.jsonify(actual,format=True)


   def test_playbook_always_run(self):
      test_callbacks = TestCallbacks()
      playbook = ansible.playbook.PlayBook(
          playbook=os.path.join(self.test_dir, 'playbook-always-run.yml'),
          host_list='test/ansible_hosts',
          stats=ans_callbacks.AggregateStats(),
          callbacks=test_callbacks,
          runner_callbacks=test_callbacks,
          check=True
      )
      actual = playbook.run()

      # if different, this will output to screen
      print "**ACTUAL**"
      print utils.jsonify(actual, format=True)
      expected =  {
          "localhost": {
              "changed": 4,
              "failures": 0,
              "ok": 4,
              "skipped": 8,
              "unreachable": 0
          }
      }
      print "**EXPECTED**"
      print utils.jsonify(expected, format=True)

      assert utils.jsonify(expected, format=True) == utils.jsonify(actual,format=True)


   def _compare_file_output(self, filename, expected_lines):
      actual_lines = []
      with open(filename) as f:
        actual_lines = [l.strip() for l in f.readlines()]
        actual_lines = sorted(actual_lines)

      print "**ACTUAL**"
      print actual_lines

      print "**EXPECTED**"
      print expected_lines

      assert actual_lines == expected_lines