From 52ad56c66a3f92890a9e09493d987e01d94985ac Mon Sep 17 00:00:00 2001
From: Susann Sgorzaly <susann.sgorzaly@itexia.com>
Date: Tue, 13 Nov 2018 19:10:10 +0100
Subject: [PATCH] fixes unparse bug if no data for unparsing remain (comments
 #150)

---
 src/Csv.php                   | 4 ++--
 tests/methods/UnparseTest.php | 7 +++++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/Csv.php b/src/Csv.php
index c901e71..ec2e998 100644
--- a/src/Csv.php
+++ b/src/Csv.php
@@ -848,8 +848,8 @@ class Csv {
         // this is needed because sometime titles property is overwritten instead of using fields parameter!
         $titlesOnParse = !empty($this->data) ? array_keys(reset($this->data)) : array();
 
-        // both are identical, also in ordering
-        if (array_values($fields) === array_values($titlesOnParse)) {
+        // both are identical, also in ordering OR we have no data (only titles)
+        if (empty($titlesOnParse) || array_values($fields) === array_values($titlesOnParse)) {
             return array_combine($fields, $fields);
         }
 
diff --git a/tests/methods/UnparseTest.php b/tests/methods/UnparseTest.php
index 6083724..f57a17a 100644
--- a/tests/methods/UnparseTest.php
+++ b/tests/methods/UnparseTest.php
@@ -81,6 +81,13 @@ class UnparseTest extends Testcase {
         $this->unparseAndCompare($expected);
     }
 
+    public function testUnparseDefaultWithoutData(){
+        unset($this->csv->data[0]);
+        unset($this->csv->data[1]);
+        $expected = "column1,column2\r";
+        $this->unparseAndCompare($expected);
+    }
+
     private function unparseAndCompare($expected, $fields = array()) {
         $str = $this->csv->unparse($this->csv->data, $fields);
         $this->assertEquals($expected, $str);