Drupal Tests in wrong place

[whikloj]

Apparently Drupal have no idea what or where tests should go. Because I am finding some weird information.

So in Islandora where IslandoraKernelTestBase extends KernelTestBase all our files fall under the section Writing Functional Tests

The important bits are

• For functional tests that do not test web output, define a class that extends \Drupal\KernelTests\KernelTestBase. This class is much faster than WebTestBase, because instead of making a full install of Drupal, it uses an in-memory pseudo-installation (similar to what the installer and update scripts use). To use this test class, you will need to create the database tables you need and install needed modules manually.
• The namespace must be a subspace/subdirectory of \Drupal\yourmodule\Tests, where yourmodule is your module's machine name.
• The test class file must be named and placed under the yourmodule/src/Tests directory, according to the PSR-4 standard.

So ours are all using:

• the namespace \Drupal\Tests\islandora which should be \Drupal\islandora\Tests
• are in the path Tests/src/Kernel which should be src/Tests/Kernel

Except that PSR-4 seems to state that tests are not placed in the src/ directory. So perhaps Drupal documentation is completely wrong?