Add Node::setAttributes() (#385)

lib/PhpParser/Node.php

@@ -71,9 +71,16 @@ interface Node
     public function &getAttribute(string $key, $default = null);
 
     /**
-     * Returns all attributes for the given node.
+     * Returns all the attributes of this node.
      *
      * @return array
      */
     public function getAttributes() : array;
-}
+
+    /**
+     * Replaces all the attributes of this node.
+     *
+     * @param array $attributes
+     */
+    public function setAttributes(array $attributes);
+}

test/PhpParser/NodeAbstractTest.php

@@ -163,6 +163,20 @@ class NodeAbstractTest extends TestCase
             ),
             $node->getAttributes()
         );
+
+        $node->setAttributes(
+            array(
+                'a' => 'b',
+                'c' => null,
+            )
+        );
+        $this->assertSame(
+            array(
+                'a' => 'b',
+                'c' => null,
+            ),
+            $node->getAttributes()
+        );
     }
 
     public function testJsonSerialization() {