support Unity testing

src/emsesp.cpp

@@ -1583,11 +1583,16 @@ EMSESP::EMSESP()
 // start all the core services
 // the services must be loaded in the correct order
 void EMSESP::start() {
+// don't need shell if running unit tests
+#if !defined(UNITY_INCLUDE_CONFIG_H)
+
     serial_console_.begin(SERIAL_CONSOLE_BAUD_RATE);
 
     shell_ = std::make_shared<EMSESPConsole>(*this, serial_console_, true);
     shell_->maximum_log_messages(100);
+
     shell_->start();
+
 #if defined(EMSESP_DEBUG)
     shell_->log_level(uuid::log::Level::DEBUG);
 #else
@@ -1598,6 +1603,8 @@ void EMSESP::start() {
     shell_->add_flags(CommandFlags::ADMIN); // always start in su/admin mode when running tests
 #endif
 
+#endif
+
 // start the file system
 #ifndef EMSESP_STANDALONE
     if (!LittleFS.begin(true)) {