Added custom address for Geonames (#695)

* Added custom address for Geonames

* Applied changes from StyleCI

* Bugfix

Author: Nyholm

Assert.php

@@ -52,6 +52,17 @@ public static function longitude($value, $message = '')
         }
     }
 
+    /**
+     * @param mixed  $value
+     * @param string $message
+     */
+    public static function notNull($value, $message = '')
+    {
+        if (null === $value) {
+            throw new \InvalidArgumentException(sprintf($message ?: 'Value cannot be null'));
+        }
+    }
+
     private static function typeToString($value)
     {
         return is_object($value) ? get_class($value) : gettype($value);

Model/Coordinates.php

@@ -35,6 +35,9 @@ final class Coordinates
      */
     public function __construct($latitude, $longitude)
     {
+        Assert::notNull($latitude);
+        Assert::notNull($longitude);
+
         $latitude = (float) $latitude;
         $longitude = (float) $longitude;