dendrobates-t-azureus/src/lib.rs

#![no_std]
#![cfg_attr(test, no_main)]
#![feature(custom_test_frameworks)]
#![test_runner(crate::test_runner)]
#![reexport_test_harness_main = "test_main"]

use core::panic::PanicInfo;

use polling_serial::{serial_print, serial_println};
use vga_buffer::{print, println};

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
#[repr(u32)]
pub enum QemuExitCode {
    Success = 0x10,
    Failed = 0x11,
}

// Custom panic handler, required for freestanding program

pub fn test_panic_handler(info: &PanicInfo) -> ! {
    serial_println!("[failed]\n");
    serial_println!("Error: {}\n", info);
    exit_qemu(QemuExitCode::Failed);
}

// Assumes isa-debug-device at 0xf4, of size 4
pub fn exit_qemu(exit_code: QemuExitCode) -> ! {
    use x86_64::instructions::port::Port;

    unsafe {
        let mut port = Port::new(0xf4);
        port.write(exit_code as u32);
    }
    loop {}
}

pub fn test_runner(tests: &[&dyn Fn()]) {
    println!("Running {} tests", tests.len());
    serial_println!("Running {} tests", tests.len());
    for test in tests {
        test();
    }

    exit_qemu(QemuExitCode::Success);
}

#[cfg(test)]
#[no_mangle]
pub extern "C" fn _start() -> ! {
    test_main();
    loop {}
}

#[cfg(test)]
#[panic_handler]
fn panic(info: &PanicInfo) -> ! {
    test_panic_handler(info)
}

#[test_case]
fn trivial_assertion() {
    print!("trivial assertion... ");
    serial_print!("trivial assertion... ");
    assert_eq!(1, 1);
    println!("[ok]");
    serial_println!("[ok]");
}

#[test_case]
fn printf_test() {
    serial_print!("Testing VGA print/println... ");
    println!("Are frogs blue?");
    print!("Yes\n");
    serial_println!("[ok]");
}