From e60da678837c70ce1b71b05004ddac8ec7550f8c Mon Sep 17 00:00:00 2001
From: Robert Clochard <github@dynamic-designer.de>
Date: Thu, 19 Apr 2018 14:03:36 +0200
Subject: [PATCH] Implements null check 4 final rendering TableWriter

In case no data was processed, now TableWriter throws an Exception. Better give an output.

You are free to change the wording :)
---
 src/TableWriter.php | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/TableWriter.php b/src/TableWriter.php
index c1399e0..c3cb0c5 100644
--- a/src/TableWriter.php
+++ b/src/TableWriter.php
@@ -46,10 +46,15 @@ public function writeItem(array $item) {
     /**
      * {@inheritdoc}
      */
-    public function finish() {
-        $this->table->setHeaders(array_keys($this->firstItem));
-        $this->table->render();
-
+    public function finish() {    	
+        if(!is_null($this->firstItem)) {
+		    $this->table->setHeaders(array_keys($this->firstItem));
+	    }else{
+		    $this->table->setHeaders(array('Result'));
+		    $this->table->addRow(array('No items processed.'));
+		}
+
+	    $this->table->render();
         $this->firstItem = null;
     }
 }