added decimal format variable for invoice duration (#1037)

tests/Invoice/Renderer/DebugRenderer.php

@@ -80,6 +80,15 @@ class DebugRenderer implements RendererInterface
         return $seconds;
     }
 
+    /**
+     * @param mixed $seconds
+     * @return mixed
+     */
+    protected function getFormattedDecimalDuration($seconds)
+    {
+        return $seconds;
+    }
+
     /**
      * Render the given InvoiceDocument with the data from the InvoiceModel into a stupid array for testing only.
      *

tests/Invoice/Renderer/DebugRendererTest.php

@@ -61,6 +61,7 @@ class DebugRendererTest extends TestCase
             'invoice.vat',
             'invoice.tax',
             'invoice.total_time',
+            'invoice.duration_decimal',
             'invoice.total',
             'invoice.subtotal',
             'template.name',
@@ -126,6 +127,7 @@ class DebugRendererTest extends TestCase
             'entry.total',
             'entry.currency',
             'entry.duration',
+            'entry.duration_decimal',
             'entry.duration_minutes',
             'entry.begin',
             'entry.begin_time',