From f3fd223b9390ddc2579c78f74f2d1c5d78cab675 Mon Sep 17 00:00:00 2001
From: Tobias Nyholm <tobias.nyholm@gmail.com>
Date: Sun, 25 Dec 2016 21:50:33 +0100
Subject: [PATCH] Allow us to reset the builder

---
 src/MultipartStreamBuilder.php | 13 +++++++++++++
 tests/FunctionTest.php         | 14 ++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/src/MultipartStreamBuilder.php b/src/MultipartStreamBuilder.php
index 5a62d75..0f634dd 100644
--- a/src/MultipartStreamBuilder.php
+++ b/src/MultipartStreamBuilder.php
@@ -229,6 +229,19 @@ public function setMimetypeHelper(MimetypeHelper $mimetypeHelper)
         return $this;
     }
 
+    /**
+     * Reset and clear all stored data. This allows you to use builder for a subsequent request.
+     *
+     * @return MultipartStreamBuilder
+     */
+    public function reset()
+    {
+        $this->data = [];
+        $this->boundary = null;
+
+        return $this;
+    }
+
     /**
      * Gets the filename from a given path.
      *
diff --git a/tests/FunctionTest.php b/tests/FunctionTest.php
index 3323bf2..ff6ea82 100644
--- a/tests/FunctionTest.php
+++ b/tests/FunctionTest.php
@@ -103,6 +103,20 @@ public function testBoundary()
         $this->assertEquals(5, substr_count($multipartStream, $boundary));
     }
 
+    public function testReset()
+    {
+        $boundary = 'SpecialBoundary';
+        $builder = new MultipartStreamBuilder();
+        $builder->addResource('content0', 'foobar');
+        $builder->setBoundary($boundary);
+
+        $builder->reset();
+        $multipartStream = (string) $builder->build();
+        $this->assertNotContains('foobar', $multipartStream, 'Stream should not have any data after reset()');
+        $this->assertNotEquals($boundary, $builder->getBoundary(), 'Stream should have a new boundary after reset()');
+        $this->assertNotEmpty($builder->getBoundary());
+    }
+
     /**
      * @param string $body
      *