From c7a62e103c471ad06430443ff6bc70c202274a25 Mon Sep 17 00:00:00 2001
From: Florian Eckerstorfer <florian@eckerstorfer.co>
Date: Thu, 5 Apr 2018 14:38:12 +0200
Subject: [PATCH] Add JsonSerializable interface to Chain

Fixes #22
---
 src/AbstractChain.php | 11 ++++++++++-
 tests/ChainTest.php   | 12 ++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/AbstractChain.php b/src/AbstractChain.php
index 87123be..f68b4bf 100644
--- a/src/AbstractChain.php
+++ b/src/AbstractChain.php
@@ -5,6 +5,7 @@
 use ArrayAccess;
 use ArrayIterator;
 use IteratorAggregate;
+use JsonSerializable;
 
 /**
  * Chain.
@@ -12,7 +13,7 @@
  * @author    Florian Eckerstorfer
  * @copyright 2015 Florian Eckerstorfer
  */
-abstract class AbstractChain implements ArrayAccess, IteratorAggregate
+abstract class AbstractChain implements ArrayAccess, IteratorAggregate, JsonSerializable
 {
     /**
      * @var array
@@ -63,4 +64,12 @@ public function offsetUnset($offset)
     {
         unset($this->array[$offset]);
     }
+
+    /**
+     * @return array
+     */
+    public function jsonSerialize()
+    {
+        return $this->array;
+    }
 }
diff --git a/tests/ChainTest.php b/tests/ChainTest.php
index f0d77cc..817ca12 100644
--- a/tests/ChainTest.php
+++ b/tests/ChainTest.php
@@ -138,4 +138,16 @@ public function chainIsCountable()
         $this->assertInstanceOf('\Countable', $c);
         $this->assertEquals(3, count($c));
     }
+
+    /**
+     * @test
+     * @covers Cocur\Chain\Chain::jsonSerialize()
+     */
+    public function chainIsJsonSerializable()
+    {
+        $c = Chain::create([0, 1, 2]);
+
+        $this->assertInstanceOf('\JsonSerializable', $c);
+        $this->assertEquals('[0,1,2]', json_encode($c));
+    }
 }