feature #779 Create MakerTestCase::createKernel method (franmomu)

This PR was merged into the 1.0-dev branch.

Discussion
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Create MakerTestCase::createKernel method

This will allow to create a custom kernel to register your own bundles and configuration.

Commits
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9790a67 Expose MakerTestCase::createKernel method

Author: weaverryan

src/Test/MakerTestCase.php

@@ -15,10 +15,14 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\MakerBundle\MakerInterface;
 use Symfony\Bundle\MakerBundle\Str;
+use Symfony\Component\HttpKernel\KernelInterface;
 use Symfony\Component\Process\Process;
 
 abstract class MakerTestCase extends TestCase
 {
+    /**
+     * @var KernelInterface
+     */
     private $kernel;
 
     /**
@@ -100,7 +104,7 @@ protected function assertContainsCount(string $needle, string $haystack, int $co
     protected function getMakerInstance(string $makerClass): MakerInterface
     {
         if (null === $this->kernel) {
-            $this->kernel = new MakerTestKernel('dev', true);
+            $this->kernel = $this->createKernel();
             $this->kernel->boot();
         }
 
@@ -110,6 +114,11 @@ protected function getMakerInstance(string $makerClass): MakerInterface
         return $this->kernel->getContainer()->get($serviceId);
     }
 
+    protected function createKernel(): KernelInterface
+    {
+        return new MakerTestKernel('dev', true);
+    }
+
     private function hasRequiredDependencyVersions(MakerTestDetails $testDetails, MakerTestEnvironment $testEnv): bool
     {
         if (empty($testDetails->getRequiredPackageVersions())) {