From 5e6de194c6e56d381da3a13c55ae0311cd2280c2 Mon Sep 17 00:00:00 2001
From: jstoone <jstoone@drk.sh>
Date: Tue, 1 Nov 2016 16:34:02 +0100
Subject: [PATCH] Throw invalid argument exception if value below zero is given

---
 src/Illuminate/Support/Collection.php   |  6 ++++++
 tests/Support/SupportCollectionTest.php | 11 +++++++++++
 2 files changed, 17 insertions(+)

diff --git a/src/Illuminate/Support/Collection.php b/src/Illuminate/Support/Collection.php
index a129c9c618b2..dde214e8f1fa 100644
--- a/src/Illuminate/Support/Collection.php
+++ b/src/Illuminate/Support/Collection.php
@@ -955,6 +955,12 @@ public function split($numberOfGroups)
      */
     public function chunk($size)
     {
+        if ($size < 0) {
+            throw new InvalidArgumentException(
+                'Size parameter expected to be greater than 0'
+            );
+        }
+
         if ($size == 0) {
             return new static;
         }
diff --git a/tests/Support/SupportCollectionTest.php b/tests/Support/SupportCollectionTest.php
index cbc809abd910..d6af9d730dd4 100755
--- a/tests/Support/SupportCollectionTest.php
+++ b/tests/Support/SupportCollectionTest.php
@@ -692,6 +692,17 @@ public function testChunkWhenGivenZeroAsSize()
         );
     }
 
+    public function testChunkWhenGivenLessThanZero()
+    {
+        $collection = new Collection([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+
+        $this->expectException(InvalidArgumentException::class);
+        $this->assertEquals(
+            [],
+            $collection->chunk(-1)->toArray()
+        );
+    }
+
     public function testEvery()
     {
         $data = new Collection([