ENH: adding wrapper around visit to detect 404s

src/SilverStripe/BehatExtension/Context/SilverStripeContext.php

@@ -498,4 +498,25 @@ EOS;
 		$this->getSession()->getDriver()->executeScript($script);
 	}
 	
+	
+	/**
+	 * @Override "When /^(?:|I )go to "(?P<page>[^"]+)"$/"
+	 * We override this function to detect issues with .htaccess external redirects.
+	 *
+	 * For instance, if the behat test is being run with a base_url which includes a
+	 * path, e.g. "http://localhost/behat-test-abc123/", .htaccess redirects may take the browser
+	 * to the wrong base path, e.g. "http://localhost/", which will then probably generate
+	 * a apache 404 response, which is pretty standard and we can detect it and give a better
+	 * error message.
+	 */
+	public function visit($page){
+		parent::visit($page);
+			
+		// We now check the response body. We would check for the response status code,
+		// but that is not quite possible yet, so this is the best we can do.
+		$page = $this->getSession()->getPage();
+		$title = $page->find('css', 'title')->getHtml(); // getText returns empty string, so have to use getHtml
+		assertNotEquals('404 Not Found', $title, 'A 404 response was detected from the server. If you intended to test an apache 404 response, please write a specific 404 test step.');
+	}
+	
 }