Create test for TRUNCATOR_MODE config

Environment

• Drupal: 11.4.4
• PHP: 8.5.5
• Database: MariaDB 10.11.16
• DDEV: v1.25.2
• Easy Breadcrumb: 2.x (commit 5bfef4e)

Prerequisites

• Easy Breadcrumb checked out on a clean 2.x branch inside a Drupal 11.4.4 site.
• PHPUnit runnable against the site, e.g.:
  

  ddev exec 'cd web/core && SIMPLETEST_BASE_URL=http://web SIMPLETEST_DB=mysql://db:db@db/db BROWSERTEST_OUTPUT_DIRECTORY=/tmp ../../vendor/bin/phpunit -c phpunit.xml.dist <test-path>'

• Confirm the coverage gap before the fix: grep -rn TRUNCATOR_MODE web/modules/contrib/easy_breadcrumb/tests/ returns no matches.

Steps

1. Apply the fix from MR !220: it adds tests/src/Functional/EasyBreadcrumbTruncatorModeTest.php, a functional test that creates a node titled Page With Long Title, enables Truncate the page's title to a maximum number with a length of 8, and asserts the segment reads Page ..., then Page Wit after disabling the trailing dots.
2. Rebuild caches: ddev drush cr
3. Run the new test and confirm it passes.
4. Mutation check: temporarily replace both TRUNCATOR_MODE conditions in src/EasyBreadcrumbBuilder.php (lines 586 and 656) with FALSE so truncation never happens, and run the test again.
5. Revert src/EasyBreadcrumbBuilder.php and run the test a final time.

Expected results

• The new test passes on unmodified 2.x.
• With truncation disabled the test fails, proving it genuinely covers the setting rather than passing vacuously.
• After reverting, the test passes again.

Actual results

Before the fix no test referenced TRUNCATOR_MODE, so the "Truncate the page's title to a maximum number" setting was completely uncovered. After applying MR !220 the new test ran green (1 test, 8 assertions; only pre-existing unrelated deprecation notices). With both truncation conditions forced to FALSE it failed with Behat\Mink\Exception\ElementHtmlException: The string "Page ..." was not found in the HTML of the element matching css "#block-breadcrumb li:nth-child(2)", confirming the assertions are meaningful; the closing elementNotContains on the full title also guards against the untruncated value. Reverting the builder restored a green run. phpcs --standard=Drupal,DrupalPractice reports no issues on the test file.

Testing produced with the assistance of an LLM.

Sorry sorry sorry @loopduplicate, previous comment updated 🙈

Looks perfect.