Add support for BrowserKit driver

spec/Behat/MinkExtension/ServiceContainer/Driver/BrowserKitFactorySpec.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace spec\Behat\MinkExtension\ServiceContainer\Driver;
+
+use PhpSpec\ObjectBehavior;
+use Behat\MinkExtension\ServiceContainer\Driver\DriverFactory;
+
+class BrowserKitFactorySpec extends ObjectBehavior
+{
+    function it_is_a_driver_factory()
+    {
+        $this->shouldHaveType(DriverFactory::class);
+    }
+
+    function it_is_named_browserkit()
+    {
+        $this->getDriverName()->shouldReturn('browserkit_http');
+    }
+
+    function it_does_not_support_javascript()
+    {
+        $this->supportsJavascript()->shouldBe(false);
+    }
+}