+ protected $values = [];
+
+ /**
+ * Initialize with test values
+ *
+ * @param array $values Initial values
+ */
+ public function __construct($values = [])
+ {
+ $this->values = $values;
+ }
+
+ /**
+ * Set a given value
+ *
+ * @param string $key Key of the value to set
+ * @param mixed $value Value to set
+ */
+ public function set($key, $value)
+ {
+ $this->values[$key] = $value;
+ }
+
+ /**
+ * Get a given configuration value
+ *
+ * @param string $key Index of the value to retrieve
+ *
+ * @return mixed The value if set, else the name of the key
+ */
+ public function get($key)