README

Behat-ExtensionDriverLocator helps you load external drivers/services (like image uploaders, output formatters, etc) dinamically. The DriverLocator can find you a service in a preconfigured namespace by a given driverkey.

• It validates that the class implements the DriverInterface or your specific interface.
• It will call the configure method of the driver to get the config tree of the driver specific configurations
• It will validate the loaded config against the provided config tree.
• It will pass the valid config and the DI container to the load method of the driver in order to get a properly loaded service. The package also provide a Driver Node Builder which can create the drivers node for your behat extension. (see usage below)

Installation

Install by adding to your composer.json:

composer require --dev bex/behat-extension-driver-locator

Usage

1. In your behat extension's configure method use the Driver Node Builder to build the drivers configuration node:

       $driverNodeBuilder = DriverNodeBuilder::getInstance($driverNamespace, $driverParent);
       $driverNodeBuilder->buildDriverNodes($builder, $activeDriversNodeName, $driversCofigurationNodeName, $defaultDriverKeys);

   where:

   • the $driverNamespace is the namespace where the DriverNodeBuilder should look for the drivers when validating a given driver key e.g.: My\\Awesome\\BehatExtension\\Driver
   • the $driverParent is the parent class/interface which should be implemented by all driver e.g.: My\\Awesome\\BehatExtension\\Driver\\MyAwesomeDriverInterface (note that all driver need to implement the Bex\Behat\ExtensionDriverLocator\DriverInterface)
   • the $builder is an Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition instance which you get in your behat extension's configure method as a parameter, the DriverNodeBuilder will add the drivers node to this builder.
   • the $activeDriversNodeName is the name of the node where the user will be able to specify which driver should be used for your extension e.g.: active_my_awesome_drivers
   • the driversCofigurationNodeName is the name of the drivers node, the additional configuration of all driver will be under this node e.g.: my_awesome_drivers
   • the $defaultDriverKeys is the driverkey of the default driver(s) which will be used when the config is empty in the behat.yml e.g.: first_awesomeness
   • Note: The driverkey is always the lowercased and underlined version of the driver's classname. e.g. FirstAwesomeness -> first_awesomeness e.g. First -> first

   With the example configurations a valid config would look like this:

   default:
     extensions:
      My\\Awesome\\BehatExtension: ~

   or

   default:
     extensions:
      My\\Awesome\\BehatExtension:
        active_my_awesome_drivers: first_awesomeness
        my_awesome_drivers:
          first_awesomeness:
            # ... all driver specific configuration goes here ...

2. In your behat extension's load method use the Driver Locator to load the active driver(s): Note that it will validate the driver specific configs automatically.

       $driverLocator = DriverLocator::getInstance($driverNamespace, $driverParent);
       $drivers = $driverLocator->findDrivers($container, $activeDrivers, $driverConfigs);

   where:

   • the $driverNamespace is the namespace where the DriverLocator should look for the drivers e.g.: My\\Awesome\\BehatExtension\\Driver
   • the $driverParent is the parent class/interface which should be implemented by all driver e.g.: My\\Awesome\\BehatExtension\\Driver\\MyAwesomeDriverInterface
   • the $container is an Symfony\Component\DependencyInjection\ContainerBuilder instance which you get in your behat extension's load method as a parameter, the DriverLocator will pass this container to the load method of each driver
   • the $activeDrivers are the active image drivers from the $config param which you get in the load method e.g.: $config['active_my_awesome_drivers']
   • the $driverConfigs are the driver specific configuration values from the $config param e.g.: $config['my_awesome_drivers']