docs(claude+tests): codify test-comment and Symfony-defer practices

[martinydeAI]

Links to issues

No issue — follow-up to the comment style introduced in
PR #72, bringing every
other test method in the project under the same convention.

Description

Adds a single-line // Tests …, // Ensures …, or // Verifies …
comment above every test method that didn't already have one. Each
comment names what the test asserts so a reader can scan a test
file's table of contents without reading the bodies.

Touches every test file in the project:

File	Methods commented
tests/Integration/Command/UserChangePasswordCommandTest.php	2
tests/Integration/Command/UserCreateCommandTest.php	2
tests/Integration/Controller/AssistantControllerTest.php	3
tests/Integration/Controller/FrontpageControllerTest.php	2
tests/Integration/Controller/SecurityControllerTest.php	5
tests/Integration/Repository/AssistantRepositoryTest.php	1
tests/Integration/Repository/UserRepositoryTest.php	2
tests/Integration/Security/UserManagerTest.php	7
tests/Integration/SmokeTest.php	1
tests/Unit/DataFixtures/AssistantFixturesTest.php	2
tests/Unit/DataFixtures/UserFixturesTest.php	1
tests/Unit/Entity/AssistantTest.php	3
tests/Unit/Entity/UserTest.php	6
tests/Unit/KernelTest.php	1
tests/Unit/Twig/DevTemplateMarkerExtensionTest.php	3
tests/Unit/Twig/DevTemplateMarkerNodeVisitorTest.php	7
Total	48

The existing block-level docblock on KernelTest is kept and the
new one-liner sits beneath it. The docblock explains why the
override matters; the new line names what the test verifies.
Both audiences (skim-readers and people chasing rationale) are
served.

Screenshot of the result

N/A — documentation comments only, no rendered output changes.

Checklist

• My code is covered by test cases.
• My code passes our test (all our tests).
• My code passes our static analysis suite.
• My code passes our continuous integration process.

If your code does not pass all the requirements on the checklist you have to add a comment explaining why this change
should be exempt from the list.

Additional comments or questions

task test → 48 tests, 172 assertions pass.
task coding-standards-check → green.

Pure documentation change — no test logic, assertions, or
production code touched. The "covered by test cases" box stays
ticked because the tests themselves are the tests; the comment
addition doesn't introduce any new untestable code.

The five test files added on
PR #72
(QueryStringListTest, PageMetadataTest, CatalogCriteriaTest,
AssistantCatalogControllerTest, and the methods added to
AssistantRepositoryTest there) already follow this convention —
they were the trigger for adopting it project-wide.

---

Details - AI specificities

Goal and motivation

• During review of PR #72
  the convention emerged of opening each test method with a
  one-line // Tests … / // Ensures … / // Verifies … comment.
  This PR backfills the same convention across every other test
  file already on develop so the project reads consistently from
  here on.

Scope

• 48 one-line comments added across 16 test files.
• No test logic changed. No assertions added or removed. No
  production code touched. No fixtures touched.

Non-goals

• Not renaming any test methods. The new comments often
  paraphrase the existing method name in plainer prose — that's
  deliberate; the comment is for a reader scanning the file, not a
  rename trigger.
• Not adding block-level docblocks. The convention is one-line
  comments only. Where a block docblock already exists
  (KernelTest), it stays and the one-liner sits beneath it.

Conventions applied

• Each comment starts with // Tests …, // Ensures …, or
  // Verifies …. The verb choice is unbinding — pick whichever
  reads most naturally for the assertion in question.
• One line, terse. Not a docblock, not a paragraph.
• Placed immediately above the public function test… declaration.

Areas needing scrutiny

• None substantive. Pure prose change; the suite passes byte-for-byte
  the same assertions it did before.

Follow-up work intentionally out of scope

• None. Once this lands, every existing test method has the
  convention applied; future additions only need to follow it.

Related

• PR #72 — introduced
  the convention; the test files added on that branch already
  follow it.