Warn when classes are used in testing environment; this means tests aren't efficient.

app/Services/Internal/Update/JournalUpdateService.php

@@ -30,7 +30,6 @@ use FireflyIII\Models\TransactionType;
 use FireflyIII\Services\Internal\Support\JournalServiceTrait;
 use Illuminate\Support\Collection;
 use Log;
-
 /**
  * Class to centralise code that updates a journal given the input by system.
  *
@@ -39,6 +38,16 @@ use Log;
 class JournalUpdateService
 {
     use JournalServiceTrait;
+    /**
+     * Constructor.
+     */
+    public function __construct()
+    {
+        if ('testing' === env('APP_ENV')) {
+            Log::warning(sprintf('%s should not be instantiated in the TEST environment!', \get_class($this)));
+        }
+    }
+
 
     /**
      * @param TransactionJournal $journal