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[52065] originally introduced the logic to guess the LCP image based on certain heuristics and to not lazy-load that image. However, with the introduction of block themes, that logic was not functioning correctly, resulting in all featured images to be lazy-loaded, regardless of whether it was the LCP image or not. Together with an update to the `core/post-featured-image` block included in [55079], this changeset fixes the logic to correctly handle featured images in block themes as well. Additionally, in combination with an update to the `core/template-part` block from [55246], this changeset includes an enhancement which uses the benefits of block template parts to avoid lazy-loading images in the `header` block template part, making the lazy-loading heuristics even more accurate for sites using a block theme. Props flixos90, adamsilverstein, mamaduka, antonvlasenko, shahidul95, reduanmasud, costdev, mukesh27, ironprogrammer, manfcarlo, robinwpdeveloper, spacedmonkey. Fixes #56930. git-svn-id: https://develop.svn.wordpress.org/trunk@55318 602fd350-edb4-49c9-b593-d223f7449a82
The short version:
1. Create a clean MySQL database and user. DO NOT USE AN EXISTING DATABASE or you will lose data, guaranteed.
2. Copy wp-tests-config-sample.php to wp-tests-config.php, edit it and include your database name/user/password.
3. $ svn up
4. Run the tests from the "trunk" directory:
To execute a particular test:
$ phpunit tests/phpunit/tests/test_case.php
To execute all tests:
$ phpunit
Notes:
Test cases live in the 'tests' subdirectory. All files in that directory will be included by default. Extend the WP_UnitTestCase class to ensure your test is run.
phpunit will initialize and install a (more or less) complete running copy of WordPress each time it is run. This makes it possible to run functional interface and module tests against a fully working database and codebase, as opposed to pure unit tests with mock objects and stubs. Pure unit tests may be used also, of course.
Changes to the test database will be rolled back as tests are finished, to ensure a clean start next time the tests are run.
phpunit is intended to run at the command line, not via a web server.