Add logging to tests

test/emul/Arduino.h

@@ -7,6 +7,7 @@
 #include <string.h>
 
 #include "HardwareSerial.h"
+#include "Logging.h"
 #include "Print.h"
 
 #include "esp-hal-gpio.h"

test/emul/Logging.h

@@ -0,0 +1,24 @@
+#ifndef LOGGING_H
+#define LOGGING_H
+
+#include <cstdarg>
+#include <cstdio>
+
+class Logging {
+ public:
+  static void printf(const char* format, ...) {
+    va_list args;
+    va_start(args, format);
+    vprintf(format, args);
+    va_end(args);
+  }
+
+  static void println(const char* message) { printf("%s\n", message); }
+
+  static void print(const char* message) { printf("%s", message); }
+};
+
+// Global logging instance
+extern Logging logging;
+
+#endif