ansible - custom filters to test type

ansible.cfg

[defaults]
filter_plugins = plugins/filter
test_plugins = plugins/test

output

PLAY [localhost] *********************************************************************************************************************

TASK [assert] ************************************************************************************************************************
ok: [localhost] => {
    "changed": false,
    "failed": false,
    "msg": "All assertions passed"
}

PLAY RECAP ***************************************************************************************************************************
localhost                  : ok=1    changed=0    unreachable=0    failed=0

play.yml

---
- hosts: localhost
  gather_facts: False
  connection: local
  vars:
    mylist:
      - one
      - abc
      - foo
    myfloat: 1.245
    myint: 10
    mystring: foobar
    mydict:
      key: value
  tasks:
    - assert:
        that:
          - mystring|is_string == True
          - mystring|get_type == 'string'

          - myint|is_int == True
          - myint|get_type == 'int'

          - myfloat|is_float == True
          - myfloat|get_type == 'float'

          - mydict|is_dict == True
          - mydict|get_type == 'dict'

type.py

# plugins/test/type.py

from __future__ import (absolute_import, division, print_function)
__metaclass__ = type


from functools import partial


def get_type(value):
    result = type(value).__name__
    if result == 'AnsibleUnicode':
        result = 'string'
    return result


def is_type(value, check_type=None):
    result = False
    if get_type(value) == check_type:
        result = True
    return result


class TestModule(object):
    '''Ansible Arista custom jinja2 filters'''

    def tests(self):
        return {
            'get_type': get_type,

            'is_dict': partial(is_type, check_type='dict'),
            'is_float': partial(is_type, check_type='float'),
            'is_int': partial(is_type, check_type='int'),
            'is_list': partial(is_type, check_type='list'),
            # a 'string' test is included in core jinja, but Ansible uses AnsibleUnicode
            # so handle that.
            'is_string': partial(is_type, check_type='string'),
        }

Excellent, thank you.