diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index fd0a947..1b77761 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,10 +1,11 @@
-set(TARGET_NAME run_tests)
+set(TARGET_LAYER0 test_layer0)
 
 
 # add test sources here ... 
-add_executable(${TARGET_NAME} 
+add_executable(${TARGET_LAYER0}
+    # add need lib and source code here
+    layer0.cpp
+)
 
-    ../lib/fischl.cpp 
-    testfischl.cpp
-    
-)
\ No newline at end of file
+# add test to activate ctest -VV
+add_test(NAME ${TARGET_LAYER0} COMMAND sudo ./${TARGET_LAYER0})
\ No newline at end of file
diff --git a/test/layer0.cpp b/test/layer0.cpp
new file mode 100644
index 0000000..4d95e8d
--- /dev/null
+++ b/test/layer0.cpp
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "rawdisk.h"
+
+int main() {
+    char *d = strdup("/dev/vdb");
+    RawDisk *H = new RawDisk(d);
+    
+    char *buf = "iloveosdfjlseirfnerig";
+    char readBuffer[512] = {0};  // Initialize to zeros
+
+    //printf("dir %s, numSectors %lld, diskSize %lld \n", H->dir, H->numSectors, H->diskSize);
+
+    //use number to substitute H->getnumSector(), getnumSectors() are not yest implemented
+    for(off_t i = 0; i < 10; i++) {
+        H->rawdisk_write(i, buf);
+    }
+    //use number to substitute H->getnumSector(), getnumSectors() are not yest implemented
+    for(off_t i = 0; i < 10; i++) {
+        H->rawdisk_read(i, readBuffer);
+        assert(strncmp(readBuffer, buf, strlen(buf)) == 0);
+    }
+
+    delete H;  // Delete the RawDisk object
+
+    return 0;
+}