Fix test for convert controller.

tests/TestCase.php

@@ -443,6 +443,14 @@ abstract class TestCase extends BaseTestCase
         return $this->getRandomGroup(TransactionType::WITHDRAWAL);
     }
 
+    /**
+     * @return TransactionGroup
+     */
+    protected function getRandomDepositGroup(): TransactionGroup
+    {
+        return $this->getRandomGroup(TransactionType::DEPOSIT);
+    }
+
     /**
      * @param string $class
      *