ensure array or traversable

README.md

@@ -117,7 +117,7 @@ In order for you to use definitions cache you have to `require doctrine/cache`.
 #### Additional settings
 
 * `containerClass`, container class that will be built, must implement `\Interop\Container\ContainerInterface`, `\Di\FactoryInterface` and `\DI\InvokerInterface` (`\Jgut\Slim\PHPDI\Container` by default)
-* `definitions`, an array of paths to definition files/directories or arrays of definitions. _Definitions are loaded in order of appearance_
+* `definitions`, an array or traversable of paths to definition files/directories or arrays of definitions. _Definitions are loaded in order of appearance_
 
 ## Services registration order
 

src/Configuration.php

@@ -67,15 +67,13 @@ public function __construct($configurations = [])
             throw new \InvalidArgumentException('Configurations must be a traversable');
         }
 
-        if (count($configurations)) {
-            $this->seedConfigurations($configurations);
-        }
+        $this->seedConfigurations($configurations);
     }
 
     /**
      * Seed configurations.
      *
-     * @param $configurations
+     * @param array|\Traversable $configurations
      */
     protected function seedConfigurations($configurations)
     {
@@ -243,7 +241,7 @@ public function getDefinitions()
     /**
      * Set definitions.
      *
-     * @param string|array $definitions
+     * @param string|array|\Traversable $definitions
      *
      * @throws \InvalidArgumentException
      *
@@ -255,9 +253,13 @@ public function setDefinitions($definitions)
             $definitions = [$definitions];
         }
 
+        if ($definitions instanceof \Traversable) {
+            $definitions = iterator_to_array($definitions);
+        }
+
         if (!is_array($definitions)) {
             throw new \InvalidArgumentException(
-                sprintf('Definitions must be a string or an array. %s given', gettype($definitions))
+                sprintf('Definitions must be a string or traversable. %s given', gettype($definitions))
             );
         }
 

tests/PHPDI/ConfigurationTest.php

@@ -77,7 +77,7 @@ public function testInvalidContainerClass()
 
     /**
      * @expectedException \InvalidArgumentException
-     * @expectedExceptionMessage Definitions must be a string or an array. integer given
+     * @expectedExceptionMessage Definitions must be a string or traversable. integer given
      */
     public function testInvalidDefinitionsType()
     {