diff --git a/MappingRegistry.php b/MappingRegistry.php
index aeaf073..3573e9f 100644
--- a/MappingRegistry.php
+++ b/MappingRegistry.php
@@ -51,7 +51,6 @@ class MappingRegistry
     public function getTypeFieldNames(Elastica_Type $type)
     {
         $key = sprintf('%s/%s', $type->getIndex()->getName(), $type->getType());
-
         if (!isset($this->mappings[$key])) {
             throw new InvalidArgumentException(sprintf('This type is not registered: "%s".', $key));
         }
diff --git a/Populator.php b/Populator.php
old mode 100644
new mode 100755
index 39287b6..751aebf
--- a/Populator.php
+++ b/Populator.php
@@ -11,7 +11,9 @@ class Populator
 
     public function __construct(array $providers)
     {
-        $this->providers = $providers;
+        foreach ($providers as $name => $provider) {
+            $this->addProvider($name, $provider);
+        }
     }
 
     public function addProvider($name, ProviderInterface $provider)
diff --git a/Tests/MappingRegistryTest.php b/Tests/MappingRegistryTest.php
new file mode 100644
index 0000000..a5a1bad
--- /dev/null
+++ b/Tests/MappingRegistryTest.php
@@ -0,0 +1,84 @@
+<?php
+
+namespace FOQ\ElasticaBundle\Tests\MappingRegistry;
+
+use FOQ\ElasticaBundle\MappingRegistry;
+use Elastica_Type;
+use Elastica_Index;
+
+class MappingRegistryTest extends \PHPUnit_Framework_TestCase
+{
+    public function testThatCanApplyMappings()
+    {
+        $typeMock = $this->getMockBuilder('Elastica_Type')
+            ->disableOriginalConstructor()
+            ->getMock();
+        
+        $typeMock->expects($this->once())
+            ->method('setMapping')
+            ->with($this->equalTo(array('mappingArray')));
+        
+        $mapping = new MappingRegistry(array(
+            'index/type' => array($typeMock, array('mappingArray'))
+        ));
+
+        $mapping->applyMappings();
+    }
+   
+    /**
+     * @dataProvider invalidTypesParametersProvider 
+     * @expectedException InvalidArgumentException
+     */
+    public function testThatCannotGetTypeFieldForTypeWhichNotExists($indexName, $typeName)
+    {
+        $type = $this->getTypeMock('index', 'type');
+        $mapping = new MappingRegistry(array(
+            'index/type' => array($type, array('mappingArray'))
+        ));
+      
+        $mapping->getTypeFieldNames($this->getTypeMock($indexName, $typeName));
+    }
+    
+    public function testThatCanGetTypeField()
+    {
+        $type = $this->getTypeMock('index', 'type');
+        $mapping = new MappingRegistry(array(
+            'index/type' => array($type, array('mappingArray'))
+        ));
+      
+        $mapping->getTypeFieldNames($this->getTypeMock('index', 'type'));
+    }
+    
+    public static function invalidTypesParametersProvider()
+    {
+      return array(
+        array('index1', 'type'),
+        array('index', 'type2')
+      );
+    }
+
+    private function getTypeMock($indexName, $typeName)
+    {
+        $typeMock = $this->getMockBuilder('Elastica_Type')
+            ->disableOriginalConstructor()
+            ->getMock();
+        
+        $indexMock = $this->getMockBuilder('Elastica_Index')
+            ->disableOriginalConstructor()
+            ->getMock();
+       
+        $indexMock->expects($this->any())
+            ->method('getName')
+            ->will($this->returnValue($indexName));
+        
+        $typeMock->expects($this->any())
+            ->method('getIndex')
+            ->will($this->returnValue($indexMock));
+        
+        $typeMock->expects($this->any())
+            ->method('getType')
+            ->will($this->returnValue($typeName));
+
+        return $typeMock;
+    }
+}
diff --git a/Tests/PopulatorTest.php b/Tests/PopulatorTest.php
old mode 100644
new mode 100755
index 1918b2a..fe1f111
--- a/Tests/PopulatorTest.php
+++ b/Tests/PopulatorTest.php
@@ -29,9 +29,32 @@ class PopulatorTest extends \PHPUnit_Framework_TestCase
     {
         $provider = $this->getMock('FOQ\ElasticaBundle\Provider\ProviderInterface', array('populate'));
         $provider->expects($this->once())
-          ->method('populate');
+            ->method('populate');
+        
+        $provider2 = $this->getMock('FOQ\ElasticaBundle\Provider\ProviderInterface', array('populate'));
+        $provider2->expects($this->once())
+            ->method('populate');
   
-        $populator = new Populator(array('l3l0Provider' => $provider));
+        $populator = new Populator(array('l3l0Provider' => $provider, 'secondProvider' => $provider2));
+        $populator->populate(function ($text) { return $text; });
+    }
+
+   /**
+    * @expectedException PHPUnit_Framework_Error
+    */
+    public function testThatAddProviderHaveToImpelementProviderInterface()
+    {
+        $populator = new Populator(array());
+        $populator->addProvider('provider', new \stdClass());
+        $populator->populate(function ($text) { return $text; });
+    }
+   
+   /**
+    * @expectedException PHPUnit_Framework_Error
+    */
+    public function testThatProvidersPassToTheContructorHaveToImpelementProviderInterface()
+    {
+        $populator = new Populator(array('provider' => new \stdClass()));
         $populator->populate(function ($text) { return $text; });
     }
 }
diff --git a/Tests/Transformer/ModelToElasticaAutoTransformerTest.php b/Tests/Transformer/ModelToElasticaAutoTransformerTest.php
new file mode 100644
index 0000000..a1c2bd5
--- /dev/null
+++ b/Tests/Transformer/ModelToElasticaAutoTransformerTest.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace FOQ\ElasticaBundle\Tests\Transformer\ModelToElasticaAutoTransformer;
+
+use FOQ\ElasticaBundle\Transformer\ModelToElasticaAutoTransformer;
+
+class POPO 
+{
+    public $id   = 123;
+    public $name = 'someName';
+    public $desc = 'desc';
+
+    public function getId()
+    {
+        return $this->id;
+    }
+
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    public function getIterator()
+    {
+        $iterator = new \ArrayIterator();
+        $iterator->append('value1');
+
+        return $iterator;
+    }
+
+    public function getArray()
+    {
+        return array('key1' => 'value1', 'key2' => 'value2');
+    }
+}
+
+class ModelToElasticaAutoTransformerTest extends \PHPUnit_Framework_TestCase
+{
+    public function testThatCanTransformObject()
+    {
+        $transformer =  new ModelToElasticaAutoTransformer();
+        $document    = $transformer->transform(new POPO(), array('name'));
+        $data        = $document->getData();
+       
+        $this->assertInstanceOf('Elastica_Document', $document);
+        $this->assertEquals(123, $document->getId());
+        $this->assertEquals('someName', $data['name']);
+    }
+   
+    public function testThatCanTransformObjectWithIteratorValue()
+    {
+        $transformer =  new ModelToElasticaAutoTransformer();
+        $document    = $transformer->transform(new POPO(), array('iterator'));
+        $data        = $document->getData();
+     
+        $this->assertEquals(array('value1'), $data['iterator']);
+    }
+    
+    public function testThatCanTransformObjectWithArrayValue()
+    {
+        $transformer =  new ModelToElasticaAutoTransformer();
+        $document    = $transformer->transform(new POPO(), array('array'));
+        $data        = $document->getData();
+     
+        $this->assertEquals(array('key1' => 'value1', 'key2' => 'value2'), $data['array']);
+    }
+
+    /**
+     * @expectedException RuntimeException
+     */
+    public function testThatCannotTransformObjectWhenGetterDoesNotExists()
+    {
+        $transformer =  new ModelToElasticaAutoTransformer();
+        $document    = $transformer->transform(new POPO(), array('desc'));
+    }
+}