+ /**
+ * Get the Mink driver args from an environment variable, if it is set. Can
+ * be overridden in a derived class so it is possible to use a different
+ * value for a subset of tests, e.g. the JavaScript tests.
+ *
+ * @return string|false
+ * The JSON-encoded argument string. False if it is not set.
+ */
+ protected function getMinkDriverArgs() {
+ return getenv('MINK_DRIVER_ARGS');
+ }
+