Create test for HOME_SEGMENT_VALIDATION_SKIP config

Opened MR !211.

Adds a functional test for a breadcrumb path with an intermediate segment that resolves to the configured front page. It covers both the default behavior and HOME_SEGMENT_VALIDATION_SKIP enabled.

Checked locally:
- php -l tests/src/Functional/EasyBreadcrumbHomeSegmentValidationSkipTest.php
- composer validate --no-check-publish
- git diff --check

@tribekk the test needed two small fixes — the pipeline failure is reproducible locally and is caused by the test itself, not by the module. I pushed them to the MR branch; details below.

Environment

• Drupal: 11.4.4
• PHP: 8.5.5
• Database: MariaDB 10.11.16
• DDEV: v1.25.2
• Easy Breadcrumb: 2.x-dev (2.x, commit c68c5f0)

Prerequisites

• Easy Breadcrumb checked out on the 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 HOME_SEGMENT_VALIDATION_SKIP web/modules/contrib/easy_breadcrumb/tests/ returns no matches.

Steps

1. Apply the fix from MR !211: it adds tests/src/Functional/EasyBreadcrumbHomeSegmentValidationSkipTest.php, a functional test that makes a node aliased /front-page the site front page, adds a child node aliased /front-page/child-page, and asserts the intermediate segment is dropped by default but kept once Do not check for path, that is duplicate of home page is enabled.
2. Rebuild caches: ddev drush cr
3. Run the new test and confirm it passes.
4. Mutation check: temporarily disable the HOME_SEGMENT_VALIDATION_SKIP branch in src/EasyBreadcrumbBuilder.php (around line 1004) and run the test again.
5. Revert the change to EasyBreadcrumbBuilder.php and run the test a final time.

Expected results

• The new test passes on unmodified 2.x.
• With the HOME_SEGMENT_VALIDATION_SKIP branch disabled, the test fails — proving it genuinely covers the setting.
• After reverting, the test passes again.

Actual results

The MR as committed fails, both in the phpunit CI job and locally: Behat\Mink\Exception\ElementHtmlException: The string "Child page" was not found in the HTML of the element matching css "#block-breadcrumb li:nth-child(2)". Two problems in the test:

• system.site page.front is set to $front_page->toUrl()->getInternalPath(), which returns node/1 without the leading slash. Drupal stores this setting with a leading slash, and EasyBreadcrumbBuilder compares the processed path against it, so the front-page exclusion never matches. With the raw value the breadcrumb is identical (Home / Front Page / Child Page) whether the setting is on or off, so the test could not cover the config at all. Using '/' . $front_page->toUrl()->getInternalPath() produces the intended difference: Home / Child Page by default, Home / Front Page / Child Page with the setting enabled.
• The asserted strings do not match the rendered output. Easy Breadcrumb capitalises segment titles, so the breadcrumb reads Front Page and Child Page, while the test asserts Front page / Child page.

With those two changes applied locally, the test passes on unmodified 2.x (1 test, 5 assertions; only pre-existing unrelated deprecation notices), and fails with ElementHtmlException: The string "Front Page" was not found ... once the HOME_SEGMENT_VALIDATION_SKIP branch is disabled — so the scenario itself is right and covers the config. phpcs --standard=Drupal,DrupalPractice reports no issues on the test file.

Testing produced with the assistance of an LLM.