How to communicate between contexts in behat 3?

问题

I can't use getMainContext() and getSubcontext($alias) in version 3 any more. What is the way to communicate between context in version 3. Are context traits the only way?

 # behat.yml
 default:
   suites:
        guest_features:
              paths:    [ %paths.base%/features/web ]
              filters:  { role: guest }
              contexts: [ GuestContext ]

        user_features:
            paths:    [ %paths.base%/features/web ]
            filters:  { role: member }
            contexts: [ MemberContext ]

        groupled_features:
            paths:    [ %paths.base%/features/web ]
            filters:  { role: grouplead}
            contexts: [ GroupleadContext ]

        admin_features:
            paths:    [ %paths.base%/features/web ]
            filters:  { role: admin }
            contexts: [ AdminContext ]

 extensions:
    Behat\MinkExtension:
        base_url: http://ollo.com
        browser_name: firefox
        selenium2:
                capabilities: { "browser": "firefox", "version": "24"}
        goutte: ~

回答1:

You can use scenario hooks, as explained in the "Accessing contexts from each other" documentation page:

use Behat\Behat\Context\Context;
use Behat\Behat\Hook\Scope\BeforeScenarioScope;

class MemberContext implements Context
{
    /** @var GuestContext */
    private $guestContext;


    /** @BeforeScenario */
    public function before(BeforeScenarioScope $scope)
    {
        // Get the environment
        $environment = $scope->getEnvironment();
        // $environment is an instance of
        //        Behat\Behat\Context\Environment\InitializedContextEnvironment


        // Get all the contexts you need in this context
        $this->guestContest = $environment->getContext('GuestContext');
        // $this->guestContest is the instance of GuestContext
     }
}

来源：https://stackoverflow.com/questions/29674685/how-to-communicate-between-contexts-in-behat-3

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