Symbiote\Components\Tests\ComponentTest::testComponentUsingClassButNotPassedIn
If you don't pass a $class variable in, $class will end up defaulting to 'Symbiote\Components\ComponentData' without additional logic that prevents that (found in ComponentData class)
This is most likely not necessary in SilverStripe 4.X, but it was a necessary check in SilverStripe 3.X
Signature
public function testComponentUsingClassButNotPassedIn()