test: ensure role gathers the facts it uses by having test clear_facts before include_role

[richm]

The role gathers the facts it uses. For example, if the user uses
ANSIBLE_GATHERING=explicit, the role uses the setup module with the
facts and subsets it requires.

This change allows us to test this. Before every role invocation, the test
will use meta: clear_facts so that the role starts with no facts.

Create a task file tests/tasks/run_role_with_clear_facts.yml to do the tasks
to clear the facts and run the role. Note that this means we don't need to
use gather_facts for the tests.

Some vars defined using ansible_facts have been changed to be defined with
set_fact instead. This is because of the fact that vars are lazily
evaluated - the var might be referenced when the facts have been cleared, and
will issue an error like ansible_facts["distribution"] is undefined. This is
typically done for blocks that have a when condition that uses ansible_facts
and the block has a role invocation using run_role_with_clear_facts.yml
These have been rewritten to define the when condition using set_fact. This
is because the when condition is evaluated every time a task is invoked in the
block, and if the facts are cleared, this will raise an undefined variable error.

Signed-off-by: Rich Megginson rmeggins@redhat.com

Summary by Sourcery

Update systemd role tests to run the role via a shared task file that clears Ansible facts before each invocation, ensuring the role gathers any facts it requires itself.

Tests:

• Replace direct role inclusions in systemd tests with a common task file that clears facts then runs the role, exercising explicit fact-gathering behavior.
• Adjust tests to no longer rely on play-level gather_facts and to support options analogous to include_role parameters (tasks_from, public, failed_when) via wrapper vars.

[sourcery-ai]

Reviewer's Guide

Test playbooks are refactored to invoke the linux-system-roles.systemd role via a new helper task file that clears facts before each role run, and a helper mechanism is added to control role execution behavior (public export and failure handling) during tests.

File-Level Changes

Change	Details	Files
Introduce a helper task file to clear facts and run the systemd role with optional public vars and failure handling for tests.	Add tests/tasks/run_role_with_clear_facts.yml which clears Ansible facts via meta: clear_facts before including linux-system-roles.systemd. Support test-time control over which task file to execute using __sr_tasks_from and whether role vars are public using __sr_public. Simulate include_role failed_when=false behavior via a block/rescue wrapper controlled by __sr_failed_when while still running the role normally when failures should propagate.	tests/tasks/run_role_with_clear_facts.yml
Refactor existing tests to use the new helper task file instead of direct role includes and to rely on the role to gather needed facts.	In tests/tests_basic.yml, remove gather_facts and direct role declarations, replacing them with a task that includes tasks/run_role_with_clear_facts.yml before each verification section. In tests/tests_user_units.yml, replace multiple include_role uses with include_tasks of tasks/run_role_with_clear_facts.yml, passing through role input vars and using __sr_public where public: true was previously used. In tests/tests_facts.yml and tests/tests_default.yml, replace direct role execution with a task that includes tasks/run_role_with_clear_facts.yml, ensuring the role runs after facts are cleared and optionally exports its vars.	tests/tests_basic.yml tests/tests_user_units.yml tests/tests_facts.yml tests/tests_default.yml

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[richm]

[citest]

[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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