---
# We assume 'create_fs' tests have passed.

- name: filesystem creation
  filesystem:
    dev: '{{ dev }}'
    fstype: '{{ fstype }}'

- name: get filesystem UUID with 'blkid'
  command:
    cmd: 'blkid -c /dev/null -o value -s UUID {{ dev }}'
  changed_when: false
  register: blkid_ref

- name: Assert that a filesystem exists on top of the device
  assert:
    that:
      - blkid_ref.stdout | length > 0


# Test check_mode first
- name: filesystem removal (check mode)
  filesystem:
    dev: '{{ dev }}'
    state: absent
  register: wipefs
  check_mode: yes

- name: get filesystem UUID with 'blkid' (should remain the same)
  command:
    cmd: 'blkid -c /dev/null -o value -s UUID {{ dev }}'
  changed_when: false
  register: blkid

- name: Assert that the state changed but the filesystem still exists
  assert:
    that:
      - wipefs is changed
      - blkid.stdout == blkid_ref.stdout

# Do it
- name: filesystem removal
  filesystem:
    dev: '{{ dev }}'
    state: absent
  register: wipefs

- name: get filesystem UUID with 'blkid' (should be empty)
  command:
    cmd: 'blkid -c /dev/null -o value -s UUID {{ dev }}'
  changed_when: false
  failed_when: false
  register: blkid

- name: Assert that the state changed and the device has no filesystem
  assert:
    that:
      - wipefs is changed
      - blkid.stdout | length == 0
      - blkid.rc == 2

# Do it again
- name: filesystem removal (idempotency)
  filesystem:
    dev: '{{ dev }}'
    state: absent
  register: wipefs

- name: Assert that the state did not change
  assert:
    that:
      - wipefs is not changed

# and again
- name: filesystem removal (idempotency, check mode)
  filesystem:
    dev: '{{ dev }}'
    state: absent
  register: wipefs
  check_mode: yes

- name: Assert that the state did not change
  assert:
    that:
      - wipefs is not changed


# By the way, test removal of a filesystem on unexistent device
- name: filesystem removal (unexistent device)
  filesystem:
    dev: '/dev/unexistent_device'
    state: absent
  register: wipefs

- name: Assert that the state did not change
  assert:
    that:
      - wipefs is not changed