Merge pull request #51 from spryker-middleware/bugfix/sm-203-json-row…

…-write-stream-throws-exception-if-theres-nothing-to-write

SM-203: Truncate file only when its size more than zero

.scrutinizer.yml

@@ -1,14 +1,12 @@
 build:
-    dependencies:
-        before:
-            - composer config repositories.spryker composer https://code.spryker.com/repo/private
     environment:
-        php:
-            version: 7.1
+        php: '7.1'
 
-checks:
-    php:
-        code_rating: true
+    nodes:
+        analysis:
+            tests:
+                override:
+                - php-scrutinizer-run
 
 filter:
     excluded_paths:

src/SprykerMiddleware/Zed/Process/Business/Stream/JsonRowWriteStream.php

@@ -81,7 +81,10 @@ public function close(): bool
         if ($this->handle) {
             $this->flush();
             $stat = fstat($this->handle);
-            ftruncate($this->handle, $stat[static::KEY_SIZE] - 1);
+
+            if ($stat[static::KEY_SIZE] > 0) {
+                ftruncate($this->handle, $stat[static::KEY_SIZE] - 1);
+            }
 
             return fclose($this->handle);
         }