Implement code for integration test post

src/main.rs

@@ -3,22 +3,12 @@
 #![cfg_attr(not(test), no_main)] // disable all Rust-level entry points
 #![cfg_attr(test, allow(dead_code, unused_macros))] // allow unused code in test mode
 
-extern crate spin;
-extern crate volatile;
 #[macro_use]
-extern crate lazy_static;
-
-#[cfg(test)]
-extern crate array_init;
-#[cfg(test)]
-extern crate std;
+extern crate blog_os;
 
 #[cfg(not(test))]
 use core::panic::PanicInfo;
 
-#[macro_use]
-mod vga_buffer;
-
 /// This function is the entry point, since the linker looks for a function
 /// named `_start_` by default.
 #[cfg(not(test))]
@@ -36,4 +26,4 @@ pub extern "C" fn _start() -> ! {
 pub fn panic(info: &PanicInfo) -> ! {
     println!("{}", info);
     loop {}
-}
+}