Test default kernel configuration

features/configuration/configuring_application_kernel.feature

@@ -0,0 +1,59 @@
+Feature: Configuring application kernel
+
+    Background:
+        Given a working Symfony application with SymfonyExtension configured
+        And a Behat configuration containing:
+        """
+        default:
+            suites:
+                default:
+                    contexts:
+                        - App\Tests\SomeContext
+        """
+        And a context file "tests/SomeContext.php" containing:
+        """
+        <?php
+
+        namespace App\Tests;
+
+        use Behat\Behat\Context\Context;
+        use Symfony\Component\HttpKernel\KernelInterface;
+
+        final class SomeContext implements Context {
+            private $kernel;
+
+            public function __construct(KernelInterface $kernel) { $this->kernel = $kernel; }
+
+            /** @Then the application kernel should have environment :environment */
+            public function kernelEnvironmentShouldBe(string $environment): void { assert($this->kernel->getEnvironment() === $environment); }
+
+            /** @Then the application kernel should have debug :state*/
+            public function kernelDebugShouldBe(string $state): void
+            {
+                $map = ['enabled' => true, 'disabled' => false];
+
+                if (!array_key_exists($state, $map)) { throw new \Exception('Invalid state passed!'); }
+
+                assert($this->kernel->isDebug() === $map[$state]);
+            }
+        }
+        """
+        And a YAML services file containing:
+        """
+        services:
+            App\Tests\SomeContext:
+                public: true
+                arguments:
+                    - "@kernel"
+        """
+
+    Scenario: Using test environment with debug enabled by default
+        Given a feature file containing:
+        """
+        Feature:
+            Scenario:
+                Then the application kernel should have environment "test"
+                And the application kernel should have debug enabled
+        """
+        When I run Behat
+        Then it should pass