ansible/test/integration/targets/replace/tasks/main.yml

# setup
- set_fact: output_dir_test={{output_dir}}/test_replace

- name: make sure our testing sub-directory does not exist
  file: path="{{ output_dir_test }}" state=absent

- name: create our testing sub-directory
  file: path="{{ output_dir_test }}" state=directory

# tests
- name: create test files
  copy:
      content: |-
                The quick brown fox jumps over the lazy dog.
                We promptly judged antique ivory buckles for the next prize.
                Jinxed wizards pluck ivy from the big quilt.
                Jaded zombies acted quaintly but kept driving their oxen forward.                
      dest: "{{ output_dir_test }}/pangrams.{{ item }}.txt"
  with_sequence: start=0 end=6 format=%02x #increment as needed


## test `before` option
- name: remove all spaces before "quilt"
  replace:
    path: "{{ output_dir_test }}/pangrams.00.txt"
    before: 'quilt'
    regexp: ' '
  register: replace_test0

- command: "cat {{ output_dir_test }}/pangrams.00.txt"
  register: replace_cat0

- name: validate before assertions
  assert:
    that:
      - replace_test0 is successful
      - replace_test0 is changed
      - replace_cat0.stdout_lines[0] == 'Thequickbrownfoxjumpsoverthelazydog.'
      - replace_cat0.stdout_lines[-1] == 'Jaded zombies acted quaintly but kept driving their oxen forward.'


## test `after` option
- name: remove all spaces after "promptly"
  replace:
    path: "{{ output_dir_test }}/pangrams.01.txt"
    after: 'promptly'
    regexp: ' '
  register: replace_test1

- command: "cat {{ output_dir_test }}/pangrams.01.txt"
  register: replace_cat1

- name: validate after assertions
  assert:
    that:
      - replace_test1 is successful
      - replace_test1 is changed
      - replace_cat1.stdout_lines[0] == 'The quick brown fox jumps over the lazy dog.'
      - replace_cat1.stdout_lines[-1] == 'Jadedzombiesactedquaintlybutkeptdrivingtheiroxenforward.'


## test combined `before` and `after` options
- name: before "promptly" but after "quilt", replace every "e" with a "3"
  replace:
    path: "{{ output_dir_test }}/pangrams.02.txt"
    before: 'promptly'
    after: 'quilt'
    regexp: 'e'
    replace: '3'
  register: replace_test2

- name: validate after+before assertions
  assert:
    that:
      - replace_test2 is successful
      - not replace_test2 is changed
      - replace_test2.msg.startswith("Pattern for before/after params did not match the given file")

- name: before "quilt" but after "promptly", replace every "e" with a "3"
  replace:
    path: "{{ output_dir_test }}/pangrams.03.txt"
    before: 'quilt'
    after: 'promptly'
    regexp: 'e'
    replace: '3'
  register: replace_test3

- command: "cat {{ output_dir_test }}/pangrams.03.txt"
  register: replace_cat3

- name: validate before+after assertions
  assert:
    that:
      - replace_test3 is successful
      - replace_test3 is changed
      - replace_cat3.stdout_lines[1] == 'We promptly judg3d antiqu3 ivory buckl3s for th3 n3xt priz3.'


## test ^$ behavior in MULTILINE, and . behavior in absense of DOTALL
- name: quote everything between bof and eof
  replace:
    path: "{{ output_dir_test }}/pangrams.04.txt"
    regexp: ^([\S\s]+)$
    replace: '"\1"'
  register: replace_test4_0

- command: "cat {{ output_dir_test }}/pangrams.04.txt"
  register: replace_cat4_0

- name: quote everything between bol and eol
  replace:
    path: "{{ output_dir_test }}/pangrams.04.txt"
    regexp: ^(.+)$
    replace: '"\1"'
  register: replace_test4_1

- command: "cat {{ output_dir_test }}/pangrams.04.txt"
  register: replace_cat4_1

- name: validate before+after assertions
  assert:
    that:
      - replace_test4_0 is successful
      - replace_test4_0 is changed
      - replace_test4_1 is successful
      - replace_test4_1 is changed
      - replace_cat4_0.stdout_lines[0] == '"The quick brown fox jumps over the lazy dog.'
      - replace_cat4_0.stdout_lines[-1] == 'Jaded zombies acted quaintly but kept driving their oxen forward."'
      - replace_cat4_1.stdout_lines[0] == '""The quick brown fox jumps over the lazy dog."'
      - replace_cat4_1.stdout_lines[-1] == '"Jaded zombies acted quaintly but kept driving their oxen forward.""'


## test \b escaping in short and long form
- name: short form with unescaped word boundaries
  replace: path="{{ output_dir_test }}/pangrams.05.txt" regexp='\b(.+)\b' replace='"\1"'
  register: replace_test5_0

- name: short form with escaped word boundaries
  replace: path="{{ output_dir_test }}/pangrams.05.txt" regexp='\\b(.+)\\b' replace='"\1"'
  register: replace_test5_1

- command: "cat {{ output_dir_test }}/pangrams.05.txt"
  register: replace_cat5_1

- name: long form with unescaped word boundaries
  replace:
    path: "{{ output_dir_test }}/pangrams.05.txt"
    regexp: '\b(.+)\b'
    replace: '"\1"'
  register: replace_test5_2

- command: "cat {{ output_dir_test }}/pangrams.05.txt"
  register: replace_cat5_2

- name: long form with escaped word boundaries
  replace:
    path: "{{ output_dir_test }}/pangrams.05.txt"
    regexp: '\\b(.+)\\b'
    replace: '"\1"'
  register: replace_test5_3

- name: validate before+after assertions
  assert:
    that:
      - not replace_test5_0 is changed
      - replace_test5_1 is changed
      - replace_test5_2 is changed
      - not replace_test5_3 is changed
      - replace_cat5_1.stdout_lines[0] == '"The quick brown fox jumps over the lazy dog".'
      - replace_cat5_1.stdout_lines[-1] == '"Jaded zombies acted quaintly but kept driving their oxen forward".'
      - replace_cat5_2.stdout_lines[0] == '""The quick brown fox jumps over the lazy dog"".'
      - replace_cat5_2.stdout_lines[-1] == '""Jaded zombies acted quaintly but kept driving their oxen forward"".'


## test backup behaviors
- name: replacement with backup
  replace:
    path: "{{ output_dir_test }}/pangrams.06.txt"
    regexp: ^(.+)$
    replace: '"\1"'
    backup: true
  register: replace_test6

- command: "cat {{ output_dir_test }}/pangrams.06.txt"
  register: replace_cat6_0

- command: "cat {{ replace_test6.backup_file }}"
  register: replace_cat6_1

- name: validate backup
  assert:
    that:
      - replace_test6 is successful
      - replace_test6 is changed
      - replace_test6.backup_file is search('/pangrams.06.txt.')
      - replace_cat6_0.stdout != replace_cat6_1.stdout


## test filesystem failures
- name: fail on directory
  replace:
    path: "{{ output_dir_test }}"
    regexp: ^(.+)$
  register: replace_test7_1
  ignore_errors: true

- name: fail on missing file
  replace:
    path: "{{ output_dir_test }}/missing_file.txt"
    regexp: ^(.+)$
  register: replace_test7_2
  ignore_errors: true

- name: validate backup
  assert:
    that:
      - replace_test7_1 is failure
      - replace_test7_2 is failure
      - replace_test7_1.msg.endswith(" is a directory !")
      - replace_test7_2.msg.endswith(" does not exist !")


## test subsection replacement when before/after potentially match more than once
- name: test file for subsection replacement gone awry
  copy:
      content: |-
                # start of group
                0.0.0.0
                127.0.0.1
                127.0.1.1
                # end of group

                # start of group
                0.0.0.0
                127.0.0.1
                127.0.1.1
                # end of group

                # start of group
                0.0.0.0
                127.0.0.1
                127.0.1.1
                # end of group                
      dest: "{{ output_dir_test }}/addresses.txt"

- name: subsection madness
  replace:
    path: "{{ output_dir_test }}/addresses.txt"
    after: '# start of group'
    before: '# end of group'
    regexp: '0'
    replace: '9'
  register: replace_test8

- command: "cat {{ output_dir_test }}/addresses.txt"
  register: replace_cat8

- name: validate before+after assertions
  assert:
    that:
      - replace_test8 is successful
      - replace_test8 is changed
      - replace_cat8.stdout_lines[1] == "9.9.9.9"
      - replace_cat8.stdout_lines[7] == "0.0.0.0"
      - replace_cat8.stdout_lines[13] == "0.0.0.0"