From 7633e54663731256452d3e39d6b0cd4fb47065cf Mon Sep 17 00:00:00 2001
From: Mathieu Maret <mathieu.maret@gmail.com>
Date: Thu, 8 Nov 2018 22:09:12 +0100
Subject: [PATCH] Add some way to test kernel

---
 Makefile     |  6 +++++-
 tests/test.c | 11 +++++++++++
 tests/test.h |  3 +++
 3 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 tests/test.c
 create mode 100644 tests/test.h

diff --git a/Makefile b/Makefile
index b27e4bf..768d515 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ LDFLAGS += -g -m32 -nostdlib -static -fno-common -fno-use-cxa-atexit -fno-except
 CFLAGS += -g -m32 -Wall -Wextra -Werror -ffreestanding  -fno-exceptions -fno-pie -fno-stack-protector
 CXXFLAGS += -g -m32 -Wall -Wextra -Werror -ffreestanding  -fno-exceptions -fno-rtti -fno-pie
 
-SUBDIRS := core drivers
+SUBDIRS := core drivers tests
 
 CPPFLAGS += $(foreach dir, $(SUBDIRS), -I$(dir))
 
@@ -37,6 +37,10 @@ core/irq_handler.o:core/irq_handler.c
 %.o:%.asm
 	$(AS) $(ASFLAGS) -o $@ $<
 
+self_test: CFLAGS += -DRUN_TEST
+self_test: clean kernel
+	qemu-system-x86_64 -kernel kernel -serial stdio
+
 test:kernel
 	qemu-system-x86_64 -kernel $<
 
diff --git a/tests/test.c b/tests/test.c
new file mode 100644
index 0000000..4fad5e4
--- /dev/null
+++ b/tests/test.c
@@ -0,0 +1,11 @@
+#include "serial.h"
+#include "vga.h"
+
+void run_test(){
+	printf("Testing Serial");
+	serialWrite('h');
+	serialWrite('e');
+	serialWrite('l');
+	serialWrite('l');
+	serialWrite('o');
+}
diff --git a/tests/test.h b/tests/test.h
new file mode 100644
index 0000000..3715a92
--- /dev/null
+++ b/tests/test.h
@@ -0,0 +1,3 @@
+#pragma once
+
+void run_test();