Add parameters to nested query.

src/Query/NestedQuery.php

@@ -12,12 +12,15 @@
 namespace ONGR\ElasticsearchDSL\Query;
 
 use ONGR\ElasticsearchDSL\BuilderInterface;
+use ONGR\ElasticsearchDSL\ParametersTrait;
 
 /**
  * Elasticsearch nested query class.
  */
 class NestedQuery implements BuilderInterface
 {
+    use ParametersTrait;
+
     /**
      * @var string
      */
@@ -51,11 +54,13 @@ class NestedQuery implements BuilderInterface
      */
     public function toArray()
     {
-        return [
-            'path' => $this->path,
-            'query' => [
-                $this->query->getType() => $this->query->toArray(),
-            ],
-        ];
+        return $this->processArray(
+            [
+                'path' => $this->path,
+                'query' => [
+                    $this->query->getType() => $this->query->toArray(),
+                ],
+            ]
+        );
     }
 }

tests/Query/NestedQueryTest.php

@@ -40,4 +40,21 @@ class NestedQueryTest extends \PHPUnit_Framework_TestCase
         $query = new NestedQuery('test_path', $missingFilterMock);
         $this->assertEquals($result, $query->toArray());
     }
+
+    /**
+     * Tests if Nested Query has parameters.
+     */
+    public function testParameters()
+    {
+        $nestedQuery = $this->getMockBuilder('ONGR\ElasticsearchDSL\Query\NestedQuery')
+            ->disableOriginalConstructor()
+            ->setMethods(null)
+            ->getMock();
+
+        $this->assertTrue(method_exists($nestedQuery, 'addParameter'), 'Nested query must have addParameter method');
+        $this->assertTrue(method_exists($nestedQuery, 'setParameters'), 'Nested query must have setParameters method');
+        $this->assertTrue(method_exists($nestedQuery, 'getParameters'), 'Nested query must have getParameters method');
+        $this->assertTrue(method_exists($nestedQuery, 'hasParameter'), 'Nested query must have hasParameter method');
+        $this->assertTrue(method_exists($nestedQuery, 'getParameter'), 'Nested query must have getParameter method');
+    }
 }