From d003707894bea9d1a1fb9a6ab69ead6941abe45d Mon Sep 17 00:00:00 2001
From: Ingo Schommer <me@chillu.com>
Date: Tue, 25 Feb 2014 11:33:12 +1300
Subject: [PATCH] BEHAT_SCREEN_SIZE env var

---
 README.md                                                | 9 +++++++++
 .../BehatExtension/Context/SilverStripeContext.php       | 5 +++++
 2 files changed, 14 insertions(+)

diff --git a/README.md b/README.md
index ee74da4..cd8fd22 100644
--- a/README.md
+++ b/README.md
@@ -280,6 +280,15 @@ Example: mymodule/tests/behat/features/bootstrap/MyModule/Test/Behaviour/Feature
 	    }
 	}
 
+### Screen Size
+
+In some Selenium drivers like [SauceLabs](http://www.saucelabs.com) you can 
+define the desired browser window size through a `capabilities` definition.
+By default, Selenium doesn't support this though, so we've added a workaround
+through an environment variable:
+
+	BEHAT_SCREEN_SIZE=320x600 vendor/bin/behat
+
 ## FAQ
 
 ### FeatureContext not found
diff --git a/src/SilverStripe/BehatExtension/Context/SilverStripeContext.php b/src/SilverStripe/BehatExtension/Context/SilverStripeContext.php
index 1b4ab03..bcac52e 100644
--- a/src/SilverStripe/BehatExtension/Context/SilverStripeContext.php
+++ b/src/SilverStripe/BehatExtension/Context/SilverStripeContext.php
@@ -131,6 +131,11 @@ class SilverStripeContext extends MinkContext implements SilverStripeAwareContex
 		}
 
 		$this->testSessionEnvironment->startTestSession($this->getTestSessionState());
+
+		if($screenSize = getenv('BEHAT_SCREEN_SIZE')) {
+			list($screenWidth, $screenHeight) = explode('x', $screenSize);
+			$this->getSession()->resizeWindow((int)$screenWidth, (int)$screenHeight);
+		}
 	}
 
 	/**