Tests for SaveInterface.js (#4402)

* tests for SaveInterface

* import LILYPONDHEADER

* space removed

* refactored

* consolidate "describe" blocks

* prompt fix

* getTurtle and getTurtleCount mocks

* remove extra newlines

* saveMIDI

* afterSaveMidi tests

---------

Co-authored-by: Walter Bender <[email protected]>

Author: Commanderk3

js/SaveInterface.js

@@ -757,7 +757,7 @@ class SaveInterface {
         this.activity.logo.runLogoCommands();
     }
 
-    /** 
+    /**
     * Perform actions after saving an MXML file.
     *
     * This method handles post-processing steps after saving an MXML file.
@@ -775,3 +775,8 @@ class SaveInterface {
         this.activity.logo.runningMxml = false;
     }
 }
+
+
+if (typeof module !== 'undefined' && module.exports) {
+    module.exports = { SaveInterface };
+}