Drupal 8 PHPUnit Deprecation Example

An example Drupal 8 project that uses PHPUnit to highlight deprecations within custom module code.

This project contains an example module that uses a deprecated function - drupal_set_message().

When the PHPUnit tests are run, the deprecation notice is displayed in the test output:

Remaining deprecation notices (1)

1x: drupal_set_message() is deprecated in Drupal 8.5.0 and will be removed before Drupal 9.0.0. Use \Drupal\Core\Messenger\MessengerInterface::addMessage() instead. See https://www.drupal.org/node/2774931 1x in DisplayMessageTest::a_message_is_displayed_on_nodes from Drupal\Tests\example\Functional

Also, a non-zero exit code is returned.

Running the tests

The project uses DDEV and contains a custom command for running PHPUnit (see this blog post that describes how to add it).

To use the command and run the tests:

ddev phpunit web/modules/custom