co⚡e: Sparkplug™ MQTT edge

METHOD PRIVATE Test_Len : BOOL
VAR_STAT
    _fbWSTRINGBuilder : Sparkplug.FB_WSTRINGBuilder;
IF counit.TEST_ORDERED('Test_Len') THEN
    _fbWSTRINGBuilder.Append( wsText1 );
    Expected := _fbWSTRINGBuilder.Len();
    AssertEquals_DINT( Expected := Expected,
                       Actual := TO_DINT( SIZEOF( wsText1 )),
                       Message := 'The string size differs' );
                           
    TEST_FINISHED();
END_IF