Update writing-tests-for-phpunit.rst

sebastianbergmann#224

Author: ricfio

src/writing-tests-for-phpunit.rst

@@ -438,6 +438,10 @@ Output will be more verbose as it'll contain that name of a dataset that breaks
             rewind($this->file);
 
             $this->current = fgetcsv($this->file);
+            if (is_array($row)) {
+                $row = array_map('intval', $row);
+            }
+            
             $this->key     = 0;
         }
 
@@ -459,6 +463,9 @@ Output will be more verbose as it'll contain that name of a dataset that breaks
         public function next(): void
         {
             $this->current = fgetcsv($this->file);
+            if (is_array($row)) {
+                $row = array_map('intval', $row);
+            }
 
             $this->key++;
         }