[MIRROR] Unit Test rework & Master/Ticker update (#11372)

Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>
Co-authored-by: C.L. <killer65311@gmail.com>

code/modules/debugging/debugger.dm

@@ -0,0 +1,54 @@
+/// The debugger instance.
+/// This is a GLOBAL_REAL because it initializes before the MC or GLOB.
+/// Really only used to check to see if the debugger is enabled or not,
+/// and to separate debugger-related code into its own thing.
+GLOBAL_REAL(Debugger, /datum/debugger)
+
+/datum/debugger
+	/// Is the debugger enabled?
+	VAR_FINAL/enabled = FALSE
+	/// The error text, if initializing the debugger errored.
+	VAR_FINAL/error
+	/// The path to the auxtools debug DLL, if it sets.
+	/// Defaults to the environmental variable AUXTOOLS_DEBUG_DLL.
+	VAR_FINAL/dll_path
+
+/datum/debugger/New(dll_path)
+	if(!isnull(Debugger))
+		CRASH("Attempted to initialize /datum/debugger when global.Debugger is already set!")
+	Debugger = src
+#ifndef OPENDREAM_REAL
+	src.dll_path = dll_path || world.GetConfig("env", "AUXTOOLS_DEBUG_DLL")
+	enable()
+#endif
+
+/datum/debugger/Destroy()
+#ifndef OPENDREAM_REAL
+	if(enabled)
+		call_ext(dll_path, "auxtools_shutdown")()
+#endif
+	return ..()
+
+/// Attempt to enable the debugger.
+/datum/debugger/proc/enable()
+#ifndef OPENDREAM_REAL
+	if(enabled)
+		CRASH("Attempted to enable debugger while its already enabled, somehow.")
+	if(!dll_path)
+		return FALSE
+	var/result = call_ext(dll_path, "auxtools_init")()
+	if(result != "SUCCESS")
+		error = result
+		return FALSE
+	enable_debugging()
+	enabled = TRUE
+	return TRUE
+#else
+	return FALSE
+#endif
+
+/datum/debugger/vv_edit_var(var_name, var_value)
+	return FALSE // no.
+
+/datum/debugger/CanProcCall(procname)
+	return FALSE // double no.