Merge branch '2.0'

* 2.0:
  Fix bug preventing changes of Mink default session service

features/mink_integration/switching_mink_sessions.feature

@@ -0,0 +1,70 @@
+Feature: Switching Mink sessions
+
+    Scenario: Switching Mink sessions
+        Given a working Symfony application with SymfonyExtension configured
+        And a Behat configuration containing:
+        """
+        default:
+            extensions:
+                Behat\MinkExtension:
+                    base_url: "http://localhost:8080/"
+                    default_session: symfony
+                    javascript_session: selenium2
+                    sessions:
+                        symfony:
+                            symfony: ~
+                        selenium2:
+                            selenium2: ~
+
+
+            suites:
+                default:
+                    contexts:
+                        - App\Tests\SomeContext
+        """
+        And a feature file containing:
+        """
+        Feature:
+            Scenario:
+                Then I should use Mink session with "FriendsOfBehat\SymfonyExtension\Driver\SymfonyDriver" as a driver
+
+            @javascript
+            Scenario:
+                Then I should use Mink session with "Behat\Mink\Driver\Selenium2Driver" as a driver
+        """
+        And a context file "tests/SomeContext.php" containing:
+        """
+        <?php
+
+        namespace App\Tests;
+
+        use Behat\Behat\Context\Context;
+        use Behat\Mink\Session;
+
+        final class SomeContext implements Context {
+            private $session;
+
+            public function __construct(Session $session)
+            {
+                $this->session = $session;
+            }
+
+            /** @Then I should use Mink session with :driver as a driver*/
+            public function shouldUseDriver(string $driverClass): void
+            {
+                var_dump(get_class($this->session));
+                var_dump(get_class($this->session->getDriver()));
+                assert($this->session->getDriver() instanceof $driverClass);
+            }
+        }
+        """
+        And a YAML services file containing:
+            """
+            services:
+                App\Tests\SomeContext:
+                    public: true
+                    arguments:
+                        - '@behat.mink.default_session'
+            """
+        When I run Behat
+        Then it should pass