Added primitive unit testing in tests/

Makefile

@@ -1,3 +1,7 @@
+ifeq ($(TEST_FORMAT),)
+	TEST_FORMAT:=tunit
+endif
+
 all: boot.img kernel.bin
 
 src/%.o: src/%.c
@@ -23,9 +27,13 @@ boot.img: boot.bin kernel.bin
 	dd if=boot.tmp of=boot.img conv=notrunc
 	rm -f boot.tmp
 
-test: boot.img
+run: boot.img
 	bochs -f bochsrc -q
 
+.PHONY: test
+test:
+	cd tests && make clean && shunit.sh -f $(TEST_FORMAT) -t test.sh
+
 .PHONY: clean
 clean:
 	rm -f boot.bin asm/*o src/*o

tests/stdlib_atoi.c

@@ -0,0 +1,11 @@
+#include "stdlib.h"
+
+#define NULL 0x00
+
+int main(void)
+{
+  if ( atoi("1234\0") != 1234 ) return 1;
+  if ( atoi("65536\0") != 65536 ) return 2;
+  if ( atoi("-32767\0") != -32767 ) return 3;
+  return 0;
+}

tests/stdlib_atoi.deps

@@ -0,0 +1 @@
+stdlib

tests/stdlib_dtoa.c

@@ -0,0 +1,20 @@
+#include "stdlib.h"
+
+#define NULL 0x00
+
+int main(void)
+{
+  if ( dtoa(0) != '0' ) return 1;
+  if ( dtoa(1) != '1' ) return 2;
+  if ( dtoa(2) != '2' ) return 3;
+  if ( dtoa(3) != '3' ) return 4;
+  if ( dtoa(4) != '4' ) return 5;
+  if ( dtoa(5) != '5' ) return 6;
+  if ( dtoa(6) != '6' ) return 7;
+  if ( dtoa(7) != '7' ) return 8;
+  if ( dtoa(8) != '8' ) return 9;
+  if ( dtoa(9) != '9' ) return 10;
+  if ( dtoa(11) != NULL ) return 11;
+  if ( dtoa(-1) != NULL ) return 12;
+  return 0;
+}

tests/stdlib_dtoa.deps

@@ -0,0 +1 @@
+stdlib

tests/test.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+for file in *.c
+do
+    filebase=$(basename $file | sed 's/\.c$//')
+    compile_def=$(cat <<EOF
+function shunittest_compile_${filebase} {
+    set -e ; make ${filebase}.elf >&2 ; test -e ${filebase}.elf ; set +e
+}
+EOF
+)
+    eval "$compile_def"
+    run_def=$(cat <<EOF
+function shunittest_run_${filebase} {
+    set -e ; ./${filebase}.elf >&2 ; set +e
+}
+EOF
+)
+    eval "$run_def"
+done