**TL;DR:**
- New image is actively maintained vs existing one that is over 5 years old.
- Slight improvement to LDAP tree config via `.ldif` files.
- No more `Dockerfile` required to build, we can just rely on `docker run`.
`osixia/openldap` has not seen any activity since Feb 2021, while our `Dockerfile` was fixed to v1.1.6` (Feb 2018).
Startup time for this new image is around 5 seconds? (_The LDAP test uses a standard 20 second timeout check to wait until the server is ready before continuing with starting the DMS image_).
This commit migrates to `bitnami/openldap` which required modifying the `01_mail-tree.ldif` to also include adding the root object to start successfully. This image is actively maintained and one of the most popular OpenLDAP images on DockerHub.
The user account `.ldif` files have minimal changes:
- Lines moved around for better organization
- Additional comments for context
- Removal of inherited `objectClass` attributes (`person`, `top`) from the `orgnizationalPerson` class. Attribute `sn` changed to long form `surname` and values corrected with `givenName`. `changetype: add` was also not necessary.
Additionally the image does not support the `.schema` format, they must be converted to `.ldif` which has been done for `postfix-book.schema`.
See PR for more details.
* tests: Switch to setup helper and conventions
* tests: Adapt run command to new conventions
- We have two helper methods with implicit `CONTAINER_NAME` reference, which is a bit more DRY and improves readability.
- `wc -l` + `assert_output 1` converted to use helper `_should_output_number_of_lines 1`
- `DOMAIN` var changed from `my-domain.com` to local testing domain `example.test`.
* tests: Refactor `setup_file()`
- Test wide ENV defined at the top
- OpenLDAP build and run logic grouped together. Added notes, network alias and tty not required.
- Extracted out special LDAP Postfix/Dovecot ENV into separate array. LDAP specific provisioning / auth ENV also included, with comments + linebreak to better group related ENV.
- Likewise additional ENV to support test cases has been extracted to a separate array with additional comments for context.
- Those two arrays are expanded back into the main `CUSTOM_SETUP_ARGUMENTS` that configure hostname and network for the DMS container.
* tests: Refactor the LDAP account table query testcase
- Covers 3 accounts to test from LDAP.
- 2 are the same query against users/aliases/groups tables in Postfix, only differing by account queried (and expected as returned result).
- 1 separate test to ensure a difference in config is supported correctly.
- Extracted repeated test logic into a helper method.
- Added additional context in comments about the creation source of these LDAP accounts and their related Postfix config / interaction. Direct reference to special case PR (since `git blame` will be less useful).
* tests: Use iteration for `grep` setting checks
More DRY approach. With a bit more helpful failure context via `assert_output` (_and only grepping the key_). Simpler to grok what's being covered.
* tests: DRY test email delivery
A bit more verbose with the new helper method. `test-email.txt` template is only used by the LDAP test, as is the `sendmail` command.
Helper will take two args to support the testcases, but at a later date should be refactored to be consistent with the `_send_email()` helper (_which presently uses `nc` that is required for plain-text mail/auth, otherwise we'd have used `openssl`, bigger refactor required_).
* tests: Slight revisions and relocating testcases
- Dovecot quota plugin testcase revised to check files exist instead of rely on `ls` failure.
- Moved Postfix quota plugin testcase into prior dovecot testcase for quota plugin check. Better error output by only querying the `smtpd_recipient_restrictions` setting (_which should be the only one configured for the service_).
- Moved the saslauthd and pflogsumm testcases (_no changes beyond revised comments_) above the `ATTENTION` comment, and one testcase below the comment that belonged to that group.
* tests: Simplify openldap `docker build` command
- `--no-cache` was creating a new image on the Docker host each time the test is run. Shouldn't be any need to build without cache.
- No need to use `pushd` + `popd`, can just provide the path context directly, and the `./Dockerfile` is an implicit default thus `-f` not required either.
Additionally removed the old `checking` prefix from testcase names.
* tests: Move LDAP specific config into `test/config/ldap/`
- No changes to any of these config files, just better isolation as not relevant to any other tests.
- Section heading in `setup_file()` added to distinguish the remainder of the function is dedicated to the DMS container setup.
- Comment providing some context about the `mv` to maintainers, this should be done after defaults are initialized but before starting up the container.
* chore: Appease the lint gods
* Apply suggestions from code review
