BlockComponent::checkRequirements() should disallow any block plugins whose definition declares it requires certain contexts

A refreshingly easy test to update. Those are a bit hard to find in XB 🙈

Thanks, this looks superb!

A refreshingly easy test to update. Those are a bit hard to find in XB 🙈

That's literally what we're working to improve → .

Note: this means that XB will start refusing ViewsBlocks whose Views use arguments, because:

          // Look for arguments and expose them as context.
          foreach ($display->getHandlers('argument') as $argument_name => $argument) {
            /** @var \Drupal\views\Plugin\views\argument\ArgumentPluginBase $argument */
            if ($context_definition = $argument->getContextDefinition()) {
              $this->derivatives[$delta]['context_definitions'][$argument_name] = $context_definition;
            }
          }

— \Drupal\views\Plugin\Derivative\ViewsBlock::getDerivativeDefinitions()

And that's a good thing, because those blocks would not work as expected in XB today, because 📌 Handle block contexts Active is not implemented yet. 👍